From 8143b618ed4700c89b1270828283e02320d235ab Mon Sep 17 00:00:00 2001
From: Muhammad Haris <101793258+headlessNode@users.noreply.github.com>
Date: Thu, 7 Aug 2025 06:01:18 +0000
Subject: [PATCH] feat: add blas/ext/find-last-index
---
.../blas/ext/find-last-index/README.md | 312 ++++++++
.../benchmark/benchmark.assign.js | 124 ++++
.../find-last-index/benchmark/benchmark.js | 116 +++
.../blas/ext/find-last-index/docs/repl.txt | 115 +++
.../ext/find-last-index/docs/types/index.d.ts | 276 +++++++
.../ext/find-last-index/docs/types/test.ts | 405 ++++++++++
.../ext/find-last-index/examples/index.js | 48 ++
.../blas/ext/find-last-index/lib/assign.js | 171 +++++
.../blas/ext/find-last-index/lib/base.js | 96 +++
.../blas/ext/find-last-index/lib/index.js | 74 ++
.../blas/ext/find-last-index/lib/main.js | 164 +++++
.../blas/ext/find-last-index/package.json | 62 ++
.../ext/find-last-index/test/test.assign.js | 694 ++++++++++++++++++
.../blas/ext/find-last-index/test/test.js | 39 +
.../ext/find-last-index/test/test.main.js | 680 +++++++++++++++++
15 files changed, 3376 insertions(+)
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/README.md
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.assign.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/docs/repl.txt
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/index.d.ts
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/test.ts
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/examples/index.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/lib/assign.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/lib/base.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/lib/index.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/lib/main.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/package.json
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.assign.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.js
create mode 100644 lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.main.js
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/README.md b/lib/node_modules/@stdlib/blas/ext/find-last-index/README.md
new file mode 100644
index 000000000000..0c5ef7acb456
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/README.md
@@ -0,0 +1,312 @@
+
+
+# findLastIndex
+
+> Return the index of the last element along an [ndarray][@stdlib/ndarray/ctor] dimension which passes a test implemented by a predicate function.
+
+
+
+## Usage
+
+```javascript
+var findLastIndex = require( '@stdlib/blas/ext/find-last-index' );
+```
+
+#### findLastIndex( x\[, options], clbk\[, thisArg] )
+
+Returns the index of the last element along an [ndarray][@stdlib/ndarray/ctor] dimension which passes a test implemented by a predicate function.
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+// Create an input ndarray:
+var x = array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
+// returns
+
+// Perform operation:
+var out = findLastIndex( x, isEven );
+// returns
+
+var idx = out.get();
+// returns 5
+```
+
+The function has the following parameters:
+
+- **x**: input [ndarray][@stdlib/ndarray/ctor]. Must have at least one dimension.
+- **options**: function options (_optional_).
+- **clbk**: callback function.
+- **thisArg**: callback execution context (_optional_).
+
+The invoked callback is provided three arguments:
+
+- **value**: current array element.
+- **idx**: current array element index.
+- **array**: input ndarray.
+
+To set the callback execution context, provide a `thisArg`.
+
+
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+function isEven( v ) {
+ this.count += 1;
+ return v % 2.0 === 0.0;
+}
+
+var x = array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
+
+var ctx = {
+ 'count': 0
+};
+var out = findLastIndex( x, isEven, ctx );
+// returns
+
+var idx = out.get();
+// returns 5
+
+var count = ctx.count;
+// returns 6
+```
+
+The function accepts the following options:
+
+- **dtype**: output ndarray [data type][@stdlib/ndarray/dtypes]. Must be an integer index or generic [data type][@stdlib/ndarray/dtypes].
+- **dim**: dimension over which to perform operation. If provided a negative integer, the dimension along which to perform the operation is determined by counting backward from the last dimension (where `-1` refers to the last dimension). Default: `-1`.
+- **keepdims**: boolean indicating whether the reduced dimensions should be included in the returned [ndarray][@stdlib/ndarray/ctor] as singleton dimensions. Default: `false`.
+
+If no element along an [ndarray][@stdlib/ndarray/ctor] passes a test implemented by the predicate function, the corresponding element in the returned [ndarray][@stdlib/ndarray/ctor] is `-1`.
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+// Create an input ndarray:
+var x = array( [ 1.0, 3.0, 5.0, 7.0 ] );
+// returns
+
+// Perform operation:
+var out = findLastIndex( x, isEven );
+// returns
+
+var idx = out.get();
+// returns -1
+```
+
+By default, the function performs the operation over elements in the last dimension. To perform the operation over a different dimension, provide a `dim` option.
+
+```javascript
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var array = require( '@stdlib/ndarray/array' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+var x = array( [ [ -1.0, 2.0 ], [ -3.0, 4.0 ] ] );
+
+var opts = {
+ 'dim': 0
+};
+
+var out = findLastIndex( x, opts, isEven );
+// returns
+
+var idx = ndarray2array( out );
+// returns [ -1, 1 ]
+```
+
+By default, the function excludes reduced dimensions from the output [ndarray][@stdlib/ndarray/ctor]. To include the reduced dimensions as singleton dimensions, set the `keepdims` option to `true`.
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+var x = array( [ [ -1.0, 2.0 ], [ -3.0, 4.0 ] ] );
+
+var opts = {
+ 'dim': 0,
+ 'keepdims': true
+};
+
+var out = findLastIndex( x, opts, isEven );
+// returns
+
+var idx = ndarray2array( out );
+// returns [ [ -1, 1 ] ]
+```
+
+By default, the function returns an [ndarray][@stdlib/ndarray/ctor] having a [data type][@stdlib/ndarray/dtypes] determined by the function's output data type [policy][@stdlib/ndarray/output-dtype-policies]. To override the default behavior, set the `dtype` option.
+
+```javascript
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dtype = require( '@stdlib/ndarray/dtype' );
+var array = require( '@stdlib/ndarray/array' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+var x = array( [ 1.0, 2.0, 3.0, 4.0 ] );
+
+var opts = {
+ 'dtype': 'generic'
+};
+
+var idx = findLastIndex( x, opts, isEven );
+// returns
+
+var dt = dtype( idx );
+// returns 'generic'
+```
+
+#### findLastIndex.assign( x, out\[, options], clbk\[, thisArg] )
+
+Returns the index of the last element along an [ndarray][@stdlib/ndarray/ctor] dimension which passes a test implemented by a predicate function and assigns results to a provided output [ndarray][@stdlib/ndarray/ctor].
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+var x = array( [ 1.0, 2.0, 3.0, 4.0 ] );
+var y = zeros( [], {
+ 'dtype': 'int32'
+});
+
+var out = findLastIndex.assign( x, y, isEven );
+// returns
+
+var idx = out.get();
+// returns 1
+
+var bool = ( out === y );
+// returns true
+```
+
+The method has the following parameters:
+
+- **x**: input [ndarray][@stdlib/ndarray/ctor]. Must have at least one dimension.
+- **out**: output [ndarray][@stdlib/ndarray/ctor].
+- **options**: function options (_optional_).
+- **clbk**: callback function.
+- **thisArg**: callback execution context (_optional_).
+
+The method accepts the following options:
+
+- **dim**: dimension over which to perform operation. If provided a negative integer, the dimension along which to perform the operation is determined by counting backward from the last dimension (where `-1` refers to the last dimension). Default: `-1`.
+
+
+
+
+
+
+
+## Notes
+
+- A provided callback function should return a boolean.
+- Setting the `keepdims` option to `true` can be useful when wanting to ensure that the output [ndarray][@stdlib/ndarray/ctor] is [broadcast-compatible][@stdlib/ndarray/base/broadcast-shapes] with ndarrays having the same shape as the input [ndarray][@stdlib/ndarray/ctor].
+- The output data type [policy][@stdlib/ndarray/output-dtype-policies] only applies to the main function and specifies that, by default, the function must return an [ndarray][@stdlib/ndarray/ctor] having an integer index or "generic" [data type][@stdlib/ndarray/dtypes]. For the `assign` method, the output [ndarray][@stdlib/ndarray/ctor] is allowed to have any supported output [data type][@stdlib/ndarray/dtypes].
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var findLastIndex = require( '@stdlib/blas/ext/find-last-index' );
+
+// Define a callback function:
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+// Generate an array of random numbers:
+var xbuf = discreteUniform( 10, 0, 20, {
+ 'dtype': 'generic'
+});
+
+// Wrap in an ndarray:
+var x = new ndarray( 'generic', xbuf, [ 5, 2 ], [ 2, 1 ], 0, 'row-major' );
+console.log( ndarray2array( x ) );
+
+var opts = {
+ 'dim': 0
+};
+
+// Perform operation:
+var idx = findLastIndex( x, opts, isEven );
+
+// Print the results:
+console.log( ndarray2array( idx ) );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[@stdlib/ndarray/ctor]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/ndarray/ctor
+
+[@stdlib/ndarray/dtypes]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/ndarray/dtypes
+
+[@stdlib/ndarray/output-dtype-policies]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/ndarray/output-dtype-policies
+
+[@stdlib/ndarray/base/broadcast-shapes]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/ndarray/base/broadcast-shapes
+
+
+
+
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.assign.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.assign.js
new file mode 100644
index 000000000000..baa11a25a030
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.assign.js
@@ -0,0 +1,124 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var pkg = require( './../package.json' ).name;
+var findLastIndex = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+ 'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {number} v - input value
+* @returns {boolean} result
+*/
+function clbk( v ) {
+ return v < 0.0;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var out;
+ var x;
+
+ x = uniform( len, 0.0, 100.0, options );
+ x = new ndarray( options.dtype, x, [ len ], [ 1 ], 0, 'row-major' );
+
+ out = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var o;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ o = findLastIndex.assign( x, out, clbk );
+ if ( typeof o !== 'object' ) {
+ b.fail( 'should return an ndarray' );
+ }
+ }
+ b.toc();
+ if ( isnan( o.get() ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var min;
+ var max;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( pkg+':assign:dtype='+options.dtype+',len='+len, f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.js
new file mode 100644
index 000000000000..8e24fe67f117
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/benchmark/benchmark.js
@@ -0,0 +1,116 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var pkg = require( './../package.json' ).name;
+var findLastIndex = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+ 'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {number} v - input value
+* @returns {boolean} result
+*/
+function clbk( v ) {
+ return v < 0.0;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var x = uniform( len, 0.0, 100.0, options );
+ x = new ndarray( options.dtype, x, [ len ], [ 1 ], 0, 'row-major' );
+
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var o;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ o = findLastIndex( x, clbk );
+ if ( typeof o !== 'object' ) {
+ b.fail( 'should return an ndarray' );
+ }
+ }
+ b.toc();
+ if ( isnan( o.get() ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var min;
+ var max;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( pkg+':dtype='+options.dtype+',len='+len, f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/repl.txt
new file mode 100644
index 000000000000..3e2b64317cfd
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/repl.txt
@@ -0,0 +1,115 @@
+
+{{alias}}( x[, options], clbk[, thisArg] )
+ Returns the index of the last element along an ndarray dimension which
+ passes a test implemented by a predicate function.
+
+ The callback function is provided the following arguments:
+
+ - value: current array element.
+ - index: current array index.
+ - array: the input ndarray.
+
+ The callback function should return a boolean.
+
+ If no element along an ndarray passes a test implemented by the predicate
+ function, the corresponding element in the returned ndarray is `-1`.
+
+ Parameters
+ ----------
+ x: ndarray
+ Input array. Must at least have one dimension.
+
+ options: Object (optional)
+ Function options.
+
+ options.dtype: string (optional)
+ Output array data type. Must be an integer index or "generic" data type.
+
+ options.dim: integer (optional)
+ Dimension over which to perform a reduction. If provided a negative
+ integer, the dimension along which to perform the operation is
+ determined by counting backward from the last dimension (where -1 refers
+ to the last dimension). Default: -1.
+
+ options.keepdims: boolean (optional)
+ Boolean indicating whether the reduced dimensions should be included in
+ the returned ndarray as singleton dimensions. Default: false.
+
+ clbk: Function
+ Callback function.
+
+ thisArg: any (optional)
+ Callback execution context.
+
+ Returns
+ -------
+ out: ndarray
+ Output array.
+
+ Examples
+ --------
+ > var x = {{alias:@stdlib/ndarray/array}}( [ -1.0, 2.0, -3.0, -4.0 ] );
+ > function clbk( v ) { return v % 2.0 === 0.0; };
+ > var y = {{alias}}( x, clbk );
+ > var v = y.get()
+ 3
+
+
+{{alias}}.assign( x, out[, options], clbk[, thisArg] )
+ Returns the index of the last element along an ndarray dimension which
+ passes a test implemented by a predicate function and assigns results to a
+ provided output ndarray.
+
+ The callback function is provided the following arguments:
+
+ - value: current array element.
+ - index: current array index.
+ - array: the input ndarray.
+
+ The callback function should return a boolean.
+
+ If no element along an ndarray passes a test implemented by the predicate
+ function, the corresponding element in the returned ndarray is `-1`.
+
+ Parameters
+ ----------
+ x: ndarray
+ Input array. Must at least have one dimension.
+
+ out: ndarray
+ Output array.
+
+ options: Object (optional)
+ Function options.
+
+ options.dim: integer (optional)
+ Dimension over which to perform a reduction. If provided a negative
+ integer, the dimension along which to perform the operation is
+ determined by counting backward from the last dimension (where -1 refers
+ to the last dimension). Default: -1.
+
+ clbk: Function
+ Callback function.
+
+ thisArg: any (optional)
+ Callback execution context.
+
+ Returns
+ -------
+ out: ndarray
+ Output array.
+
+ Examples
+ --------
+ > var x = {{alias:@stdlib/ndarray/array}}( [ -1.0, 2.0, -3.0, -4.0 ] );
+ > var out = {{alias:@stdlib/ndarray/zeros}}( [] );
+ > function clbk( v ) { return v % 2.0 === 0.0; };
+ > var y = {{alias}}.assign( x, out, clbk )
+
+ > var bool = ( out === y )
+ true
+ > var v = out.get()
+ 3
+
+ See Also
+ --------
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/index.d.ts
new file mode 100644
index 000000000000..139845346aff
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/index.d.ts
@@ -0,0 +1,276 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+///
+
+import { IntegerIndexAndGenericDataType as DataType, typedndarray } from '@stdlib/types/ndarray';
+
+/**
+* Input array.
+*/
+type InputArray = typedndarray;
+
+/**
+* Output array.
+*/
+type OutputArray = typedndarray;
+
+/**
+* Returns the result of callback function.
+*
+* @returns result
+*/
+type NullaryCallback = ( this: ThisArg ) => boolean;
+
+/**
+* Returns the result of callback function.
+*
+* @param value - current array element
+* @returns result
+*/
+type UnaryCallback = ( this: ThisArg, value: T ) => boolean;
+
+/**
+* Returns the result of callback function.
+*
+* @param value - current array element
+* @param index - current array element index
+* @returns result
+*/
+type BinaryCallback = ( this: ThisArg, value: T, index: number ) => boolean;
+
+/**
+* Returns the result of callback function.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param array - input ndarray
+* @returns result
+*/
+type TernaryCallback = ( this: ThisArg, value: T, index: number, array: U ) => boolean;
+
+/**
+* Returns the result of callback function.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param array - input ndarray
+* @returns result
+*/
+type Callback = NullaryCallback | UnaryCallback | BinaryCallback | TernaryCallback;
+
+/**
+* Interface defining "base" options.
+*/
+interface BaseOptions {
+ /**
+ * Dimension over which to perform operation. Default: `-1`.
+ *
+ * ## Notes
+ *
+ * - If provided a negative integer, the dimension along which to perform the operation is determined by counting backward from the last dimension (where `-1` refers to the last dimension).
+ */
+ dim?: number;
+}
+
+/**
+* Interface defining options.
+*/
+interface Options extends BaseOptions {
+ /**
+ * Output array data type.
+ */
+ dtype?: DataType;
+
+ /**
+ * Boolean indicating whether the reduced dimensions should be included in the returned array as singleton dimensions. Default: `false`.
+ */
+ keepdims?: boolean;
+}
+
+/**
+* Interface describing `findLastIndex`
+*/
+interface FindLastIndex {
+ /**
+ * Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.
+ *
+ * @param x - input ndarray
+ * @param clbk - callback function
+ * @param thisArg - callback function execution context
+ * @returns output ndarray
+ *
+ * @example
+ * var array = require( '@stdlib/ndarray/array' );
+ *
+ * function clbk( value ) {
+ * return value % 2.0 === 0.0;
+ * }
+ *
+ * var x = array( [ -1.0, 2.0, -3.0 ] );
+ *
+ * var y = findLastIndex( x, clbk );
+ * // returns
+ *
+ * var v = y.get();
+ * // returns 1
+ */
+ = InputArray, ThisArg = unknown>( x: U, clbk: Callback, thisArg?: ThisParameterType> ): OutputArray;
+
+ /**
+ * Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.
+ *
+ * @param x - input ndarray
+ * @param options - function options
+ * @param clbk - callback function
+ * @param thisArg - callback function execution context
+ * @returns output ndarray
+ *
+ * @example
+ * var array = require( '@stdlib/ndarray/array' );
+ *
+ * function clbk( value ) {
+ * return value % 2.0 === 0.0;
+ * }
+ *
+ * var x = array( [ -1.0, 2.0, -3.0 ] );
+ *
+ * var y = findLastIndex( x, {}, clbk );
+ * // returns
+ *
+ * var v = y.get();
+ * // returns 1
+ */
+ = InputArray, ThisArg = unknown>( x: U, options: Options, clbk: Callback, thisArg?: ThisParameterType> ): OutputArray;
+
+ /**
+ * Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function and assigns results to a provided output ndarray.
+ *
+ * @param x - input ndarray
+ * @param out - output ndarray
+ * @param clbk - callback function
+ * @param thisArg - callback function execution context
+ * @returns output ndarray
+ *
+ * @example
+ * var array = require( '@stdlib/ndarray/array' );
+ * var zeros = require( '@stdlib/ndarray/zeros' );
+ *
+ * function clbk( value ) {
+ * return value % 2.0 === 0.0;
+ * }
+ *
+ * var x = array( [ -1.0, 2.0, -3.0 ] );
+ * var y = zeros( [] );
+ *
+ * var out = findLastIndex.assign( x, y, clbk );
+ * // returns
+ *
+ * var v = out.get();
+ * // returns 1
+ *
+ * var bool = ( out === y );
+ * // returns true
+ */
+ assign = InputArray, V extends OutputArray = OutputArray, ThisArg = unknown>( x: U, out: V, clbk: Callback, thisArg?: ThisParameterType> ): V;
+
+ /**
+ * Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function and assigns results to a provided output ndarray.
+ *
+ * @param x - input ndarray
+ * @param out - output ndarray
+ * @param options - function options
+ * @param clbk - callback function
+ * @param thisArg - callback function execution context
+ * @returns output ndarray
+ *
+ * @example
+ * var array = require( '@stdlib/ndarray/array' );
+ * var zeros = require( '@stdlib/ndarray/zeros' );
+ *
+ * function clbk( value ) {
+ * return value % 2.0 === 0.0;
+ * }
+ *
+ * var x = array( [ -1.0, 2.0, -3.0 ] );
+ * var y = zeros( [] );
+ *
+ * var out = findLastIndex.assign( x, y, {}, clbk );
+ * // returns
+ *
+ * var v = out.get();
+ * // returns 1
+ *
+ * var bool = ( out === y );
+ * // returns true
+ */
+ assign = InputArray, V extends OutputArray = OutputArray, ThisArg = unknown>( x: U, out: V, options: BaseOptions, clbk: Callback, thisArg?: ThisParameterType> ): V;
+}
+
+/**
+* Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function and assigns results to a provided output ndarray.
+*
+* @param x - input ndarray
+* @param options - function options
+* @param clbk - callback function
+* @param thisArg - callback execution context
+* @returns output ndarray
+*
+* @example
+* var array = require( '@stdlib/ndarray/array' );
+*
+* function clbk( value ) {
+* return value % 2.0 === 0.0;
+* }
+*
+* var x = array( [ -1.0, 2.0, -3.0 ] )
+*
+* var y = findLastIndex( x, clbk );
+* // returns
+*
+* var v = y.get();
+* // returns 1
+*
+* @example
+* var array = require( '@stdlib/ndarray/array' );
+* var zeros = require( '@stdlib/ndarray/zeros' );
+*
+* function clbk( value ) {
+* return value % 2.0 === 0.0;
+* }
+*
+* var x = array( [ -1.0, 2.0, -3.0 ] )
+* var y = zeros( [] );
+*
+* var out = findLastIndex.assign( x, y, clbk );
+* // returns
+*
+* var v = out.get();
+* // returns 1
+*
+* var bool = ( out === y );
+* // returns true
+*/
+declare const findLastIndex: FindLastIndex;
+
+
+// EXPORTS //
+
+export = findLastIndex;
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/test.ts
new file mode 100644
index 000000000000..68128b161921
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/docs/types/test.ts
@@ -0,0 +1,405 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/* eslint-disable @typescript-eslint/no-unused-expressions, space-in-parens */
+
+///
+
+import zeros = require( '@stdlib/ndarray/zeros' );
+import findLastIndex = require( './index' );
+
+/**
+* Callback function.
+*
+* @param value - ndarray element
+* @returns result
+*/
+function clbk( value: any ): boolean {
+ return value % 2.0 === 0.0;
+}
+
+
+// TESTS //
+
+// The function returns an ndarray...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, clbk ); // $ExpectType OutputArray
+ findLastIndex( x, clbk, {} ); // $ExpectType OutputArray
+
+ findLastIndex( x, {}, clbk ); // $ExpectType OutputArray
+ findLastIndex( x, {}, clbk, {} ); // $ExpectType OutputArray
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an ndarray...
+{
+ findLastIndex( '5', clbk ); // $ExpectError
+ findLastIndex( 5, clbk ); // $ExpectError
+ findLastIndex( true, clbk ); // $ExpectError
+ findLastIndex( false, clbk ); // $ExpectError
+ findLastIndex( null, clbk ); // $ExpectError
+ findLastIndex( void 0, clbk ); // $ExpectError
+ findLastIndex( {}, clbk ); // $ExpectError
+ findLastIndex( ( x: number ): number => x, clbk ); // $ExpectError
+
+ findLastIndex( '5', clbk, {} ); // $ExpectError
+ findLastIndex( 5, clbk, {} ); // $ExpectError
+ findLastIndex( true, clbk, {} ); // $ExpectError
+ findLastIndex( false, clbk, {} ); // $ExpectError
+ findLastIndex( null, clbk, {} ); // $ExpectError
+ findLastIndex( void 0, clbk, {} ); // $ExpectError
+ findLastIndex( {}, clbk, {} ); // $ExpectError
+ findLastIndex( ( x: number ): number => x, clbk, {} ); // $ExpectError
+
+ findLastIndex( '5', {}, clbk ); // $ExpectError
+ findLastIndex( 5, {}, clbk ); // $ExpectError
+ findLastIndex( true, {}, clbk ); // $ExpectError
+ findLastIndex( false, {}, clbk ); // $ExpectError
+ findLastIndex( null, {}, clbk ); // $ExpectError
+ findLastIndex( void 0, {}, clbk ); // $ExpectError
+ findLastIndex( {}, {}, clbk ); // $ExpectError
+ findLastIndex( ( x: number ): number => x, {}, clbk ); // $ExpectError
+
+ findLastIndex( '5', {}, clbk, {} ); // $ExpectError
+ findLastIndex( 5, {}, clbk, {} ); // $ExpectError
+ findLastIndex( true, {}, clbk, {} ); // $ExpectError
+ findLastIndex( false, {}, clbk, {} ); // $ExpectError
+ findLastIndex( null, {}, clbk, {} ); // $ExpectError
+ findLastIndex( void 0, {}, clbk, {} ); // $ExpectError
+ findLastIndex( {}, {}, clbk, {} ); // $ExpectError
+ findLastIndex( ( x: number ): number => x, {}, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an options argument which is not an object...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, '5', clbk ); // $ExpectError
+ findLastIndex( x, true, clbk ); // $ExpectError
+ findLastIndex( x, false, clbk ); // $ExpectError
+ findLastIndex( x, null, clbk ); // $ExpectError
+ findLastIndex( x, [], clbk ); // $ExpectError
+
+ findLastIndex( x, '5', clbk, {} ); // $ExpectError
+ findLastIndex( x, true, clbk, {} ); // $ExpectError
+ findLastIndex( x, false, clbk, {} ); // $ExpectError
+ findLastIndex( x, null, clbk, {} ); // $ExpectError
+ findLastIndex( x, [], clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a callback argument which is not a function...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, '5' ); // $ExpectError
+ findLastIndex( x, true ); // $ExpectError
+ findLastIndex( x, false ); // $ExpectError
+ findLastIndex( x, null ); // $ExpectError
+ findLastIndex( x, [] ); // $ExpectError
+
+ findLastIndex( x, '5', {} ); // $ExpectError
+ findLastIndex( x, true, {} ); // $ExpectError
+ findLastIndex( x, false, {} ); // $ExpectError
+ findLastIndex( x, null, {} ); // $ExpectError
+ findLastIndex( x, [], {} ); // $ExpectError
+
+ findLastIndex( x, {}, '5', {} ); // $ExpectError
+ findLastIndex( x, {}, true, {} ); // $ExpectError
+ findLastIndex( x, {}, false, {} ); // $ExpectError
+ findLastIndex( x, {}, null, {} ); // $ExpectError
+ findLastIndex( x, {}, [], {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an invalid `dtype` option...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, { 'dtype': '5' }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': 5 }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': true }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': false }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': null }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': [] }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': {} }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dtype': ( x: number ): number => x }, clbk ); // $ExpectError
+
+ findLastIndex( x, { 'dtype': '5' }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': 5 }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': true }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': false }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': null }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': [] }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': {} }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dtype': ( x: number ): number => x }, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an invalid `keepdims` option...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, { 'keepdims': '5' }, clbk ); // $ExpectError
+ findLastIndex( x, { 'keepdims': 5 }, clbk ); // $ExpectError
+ findLastIndex( x, { 'keepdims': null }, clbk ); // $ExpectError
+ findLastIndex( x, { 'keepdims': [] }, clbk ); // $ExpectError
+ findLastIndex( x, { 'keepdims': {} }, clbk ); // $ExpectError
+ findLastIndex( x, { 'keepdims': ( x: number ): number => x }, clbk ); // $ExpectError
+
+ findLastIndex( x, { 'keepdims': '5' }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'keepdims': 5 }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'keepdims': null }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'keepdims': [] }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'keepdims': {} }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'keepdims': ( x: number ): number => x }, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an invalid `dim` option...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex( x, { 'dim': '5' }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dim': true }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dim': false }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dim': null }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dim': {} }, clbk ); // $ExpectError
+ findLastIndex( x, { 'dim': ( x: number ): number => x }, clbk ); // $ExpectError
+
+ findLastIndex( x, { 'dim': '5' }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': 5 }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': true }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': false }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': null }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': {} }, clbk, {} ); // $ExpectError
+ findLastIndex( x, { 'dim': ( x: number ): number => x }, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex(); // $ExpectError
+ findLastIndex( x );
+ findLastIndex( x, {}, clbk, {}, {} ); // $ExpectError
+}
+
+// Attached to the function is an `assign` method which returns an ndarray...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign( x, y, clbk ); // $ExpectType int32ndarray
+ findLastIndex.assign( x, y, {}, clbk ); // $ExpectType int32ndarray
+
+ findLastIndex.assign( x, y, clbk, {} ); // $ExpectType int32ndarray
+ findLastIndex.assign( x, y, {}, clbk, {} ); // $ExpectType int32ndarray
+}
+
+// The compiler throws an error if the `assign` method is provided a first argument which is not an ndarray...
+{
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign( '5', y, clbk ); // $ExpectError
+ findLastIndex.assign( 5, y, clbk ); // $ExpectError
+ findLastIndex.assign( true, y, clbk ); // $ExpectError
+ findLastIndex.assign( false, y, clbk ); // $ExpectError
+ findLastIndex.assign( null, y, clbk ); // $ExpectError
+ findLastIndex.assign( void 0, y, clbk ); // $ExpectError
+ findLastIndex.assign( {}, y, clbk ); // $ExpectError
+ findLastIndex.assign( ( x: number ): number => x, y, clbk ); // $ExpectError
+
+ findLastIndex.assign( '5', y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( 5, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( true, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( false, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( null, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( void 0, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( {}, y, {}, clbk ); // $ExpectError
+ findLastIndex.assign( ( x: number ): number => x, y, {}, clbk ); // $ExpectError
+
+ findLastIndex.assign( '5', y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( 5, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( true, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( false, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( null, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( void 0, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( {}, y, clbk, {} ); // $ExpectError
+ findLastIndex.assign( ( x: number ): number => x, y, clbk, {} ); // $ExpectError
+
+ findLastIndex.assign( '5', y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( 5, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( true, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( false, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( null, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( void 0, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( {}, y, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( ( x: number ): number => x, y, {}, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the `assign` method is provided a second argument which is not an ndarray...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ findLastIndex.assign( x, '5', clbk ); // $ExpectError
+ findLastIndex.assign( x, 5, clbk ); // $ExpectError
+ findLastIndex.assign( x, true, clbk ); // $ExpectError
+ findLastIndex.assign( x, false, clbk ); // $ExpectError
+ findLastIndex.assign( x, null, clbk ); // $ExpectError
+ findLastIndex.assign( x, void 0, clbk ); // $ExpectError
+ findLastIndex.assign( x, ( x: number ): number => x, clbk ); // $ExpectError
+
+ findLastIndex.assign( x, '5', {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, 5, {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, true, {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, false, {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, null, {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, void 0, {}, clbk ); // $ExpectError
+ findLastIndex.assign( x, ( x: number ): number => x, {}, clbk ); // $ExpectError
+
+ findLastIndex.assign( x, '5', clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, 5, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, true, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, false, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, null, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, void 0, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, ( x: number ): number => x, clbk, {} ); // $ExpectError
+
+ findLastIndex.assign( x, '5', {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, 5, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, true, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, false, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, null, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, void 0, {}, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, ( x: number ): number => x, {}, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the `assign` method is provided an options argument which is not an object...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign( x, y, '5', clbk ); // $ExpectError
+ findLastIndex.assign( x, y, true, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, false, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, null, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, [], clbk ); // $ExpectError
+
+ findLastIndex.assign( x, y, '5', clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, true, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, false, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, null, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, [], clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the `assign` method is provided a callback argument which is not a function...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign( x, y, '5' ); // $ExpectError
+ findLastIndex.assign( x, y, true ); // $ExpectError
+ findLastIndex.assign( x, y, false ); // $ExpectError
+ findLastIndex.assign( x, y, null ); // $ExpectError
+ findLastIndex.assign( x, y, [] ); // $ExpectError
+
+ findLastIndex.assign( x, y, '5', {} ); // $ExpectError
+ findLastIndex.assign( x, y, true, {} ); // $ExpectError
+ findLastIndex.assign( x, y, false, {} ); // $ExpectError
+ findLastIndex.assign( x, y, null, {} ); // $ExpectError
+ findLastIndex.assign( x, y, [], {} ); // $ExpectError
+
+ findLastIndex.assign( x, y, {}, '5' ); // $ExpectError
+ findLastIndex.assign( x, y, {}, true ); // $ExpectError
+ findLastIndex.assign( x, y, {}, false ); // $ExpectError
+ findLastIndex.assign( x, y, {}, null ); // $ExpectError
+ findLastIndex.assign( x, y, {}, [] ); // $ExpectError
+
+ findLastIndex.assign( x, y, {}, '5', {} ); // $ExpectError
+ findLastIndex.assign( x, y, {}, true, {} ); // $ExpectError
+ findLastIndex.assign( x, y, {}, false, {} ); // $ExpectError
+ findLastIndex.assign( x, y, {}, null, {} ); // $ExpectError
+ findLastIndex.assign( x, y, {}, [], {} ); // $ExpectError
+}
+
+// The compiler throws an error if the `assign` method is provided an invalid `dim` option...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign( x, y, { 'dim': '5' }, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': true }, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': false }, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': null }, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': {} }, clbk ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': ( x: number ): number => x }, clbk ); // $ExpectError
+
+ findLastIndex.assign( x, y, { 'dim': '5' }, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': true }, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': false }, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': null }, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': {} }, clbk, {} ); // $ExpectError
+ findLastIndex.assign( x, y, { 'dim': ( x: number ): number => x }, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the `assign` method is provided an unsupported number of arguments...
+{
+ const x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ const y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ findLastIndex.assign(); // $ExpectError
+ findLastIndex.assign( x ); // $ExpectError
+ findLastIndex.assign( x, y ); // $ExpectError
+ findLastIndex.assign( x, y, {}, clbk, {}, {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/examples/index.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/examples/index.js
new file mode 100644
index 000000000000..4351f9dfd94a
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/examples/index.js
@@ -0,0 +1,48 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var findLastIndex = require( './../lib' );
+
+// Define a callback function:
+function isEven( v ) {
+ return v % 2.0 === 0.0;
+}
+
+// Generate an array of random numbers:
+var xbuf = discreteUniform( 10, 0, 20, {
+ 'dtype': 'generic'
+});
+
+// Wrap in an ndarray:
+var x = new ndarray( 'generic', xbuf, [ 5, 2 ], [ 2, 1 ], 0, 'row-major' );
+console.log( ndarray2array( x ) );
+
+var opts = {
+ 'dim': 0
+};
+
+// Perform operation:
+var idx = findLastIndex( x, opts, isEven );
+
+// Print the results:
+console.log( ndarray2array( idx ) );
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/assign.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/assign.js
new file mode 100644
index 000000000000..0ff4ae9e9389
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/assign.js
@@ -0,0 +1,171 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var isFunction = require( '@stdlib/assert/is-function' );
+var isPlainObject = require( '@stdlib/assert/is-plain-object' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var format = require( '@stdlib/string/format' );
+var base = require( './base.js' ).assign;
+
+
+// MAIN //
+
+/**
+* Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function and assigns the results to a provided output ndarray.
+*
+* @param {ndarrayLike} x - input ndarray
+* @param {ndarrayLike} out - output ndarray
+* @param {Options} [options] - function options
+* @param {integer} [options.dim=-1] - dimension over which to perform operation
+* @param {Function} clbk - callback function
+* @param {*} [thisArg] - callback execution context
+* @throws {TypeError} function must be provided at least three arguments
+* @throws {TypeError} first argument must be an ndarray-like object
+* @throws {TypeError} second argument must be an ndarray-like object
+* @throws {TypeError} third argument must be a function
+* @throws {TypeError} options argument must be an object
+* @throws {RangeError} dimension index must not exceed input ndarray bounds
+* @throws {RangeError} first argument must have at least one dimension
+* @throws {Error} must provide valid options
+* @returns {ndarray} output ndarray
+*
+* @example
+* var zeros = require( '@stdlib/ndarray/zeros' );
+* var ndarray2array = require( '@stdlib/ndarray/to-array' );
+* var ndarray = require( '@stdlib/ndarray/ctor' );
+*
+* function isEven( v ) {
+* return v % 2.0 === 0.0;
+* }
+*
+* // Create data buffers:
+* var xbuf = [ 1.0, 2.0, -3.0, 4.0, -5.0, 6.0 ];
+*
+* // Define the shape of the input array:
+* var shape = [ 2, 3 ];
+*
+* // Define the array strides:
+* var strides = [ 3, 1 ];
+*
+* // Define the index offset:
+* var offset = 0;
+*
+* // Create an input ndarray:
+* var x = new ndarray( 'generic', xbuf, shape, strides, offset, 'row-major' );
+*
+* // Create an output ndarray:
+* var y = zeros( [ 2 ], {
+* 'dtype': 'int32'
+* });
+*
+* // Perform operation:
+* var out = assign( x, y, isEven );
+* // returns
+*
+* var bool = ( out === y );
+* // returns true
+*
+* var arr = ndarray2array( out );
+* // returns [ -1, 1 ]
+*/
+function assign( x, out ) {
+ var hasOptions;
+ var options;
+ var nargs;
+ var opts;
+ var ctx;
+ var cb;
+ var sh;
+
+ nargs = arguments.length;
+ if ( !isndarrayLike( x ) ) {
+ throw new TypeError( format( 'invalid argument. The first argument must be an ndarray. Value: `%s`.', x ) );
+ }
+ if ( !isndarrayLike( out ) ) {
+ throw new TypeError( format( 'invalid argument. The second argument must be an ndarray. Value: `%s`.', out ) );
+ }
+ if ( nargs < 3 ) {
+ throw new TypeError( format( 'invalid argument. Function must be provided a callback function. Value: `%s`.', arguments[ 2 ] ) );
+ }
+
+ // Initialize an options object:
+ opts = {
+ 'dims': [ -1 ] // default behavior is to perform a reduction over the last dimension
+ };
+
+ // Initialize a flag indicating whether an `options` argument was provided:
+ hasOptions = false;
+
+ // Case: assign( x, out, clbk )
+ if ( nargs === 3 ) {
+ cb = arguments[ 1 ];
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ }
+ // Case: assign( x, out, options, clbk ) or Case: assign( x, out, clbk, thisArg )
+ else if ( nargs < 5 ) {
+ options = arguments[ 2 ];
+ cb = arguments[ 3 ];
+ if ( isFunction( options ) ) {
+ cb = options;
+ ctx = cb;
+ } else {
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ hasOptions = true;
+ }
+ }
+ // Case: assign( x, out, options, clbk, thisArg )
+ else {
+ options = arguments[ 2 ];
+ hasOptions = true;
+ cb = arguments[ 3 ];
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ ctx = arguments[ 4 ];
+ }
+ if ( hasOptions ) {
+ if ( !isPlainObject( options ) ) {
+ throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
+ }
+ // Resolve provided options...
+ if ( hasOwnProp( options, 'dim' ) ) {
+ opts.dims[ 0 ] = options.dim;
+ }
+ }
+ // Resolve the list of non-reduced dimensions:
+ sh = getShape( x );
+ if ( sh.length < 1 ) {
+ throw new RangeError( 'invalid argument. First argument must have at least one dimension.' );
+ }
+ return base( x, out, opts, cb, ctx );
+}
+
+
+// EXPORTS //
+
+module.exports = assign;
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/base.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/base.js
new file mode 100644
index 000000000000..399887f0eb0c
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/base.js
@@ -0,0 +1,96 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var dtypes = require( '@stdlib/ndarray/dtypes' );
+var gfindLastIndex = require( '@stdlib/blas/ext/base/ndarray/gfind-last-index' );
+var factory = require( '@stdlib/ndarray/base/unary-reduce-strided1d-dispatch-by-factory' );
+
+
+// VARIABLES //
+
+var idtypes = dtypes( 'all' );
+var odtypes = dtypes( 'integer_index_and_generic' );
+var policies = {
+ 'output': 'integer_index_and_generic',
+ 'casting': 'none'
+};
+var table = {
+ 'default': gfindLastIndex
+};
+
+
+// MAIN //
+
+/**
+* Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.
+*
+* @private
+* @name findLastIndex
+* @type {Function}
+* @param {ndarrayLike} x - input ndarray
+* @param {Options} [options] - function options
+* @param {IntegerArray} [options.dims] - list of dimensions over which to perform operation
+* @param {string} [options.dtype] - output ndarray data type
+* @param {Function} clbk - callback function
+* @param {*} [thisArg] - callback execution context
+* @throws {TypeError} first argument must be an ndarray-like object
+* @throws {TypeError} options argument must be an object
+* @throws {RangeError} dimension indices must not exceed input ndarray bounds
+* @throws {RangeError} number of dimension indices must not exceed the number of input ndarray dimensions
+* @throws {Error} must provide valid options
+* @returns {ndarray} output ndarray
+*
+* @example
+* var ndarray = require( '@stdlib/ndarray/ctor' );
+*
+* function isEven( v ) {
+* return v % 2.0 === 0.0;
+* }
+*
+* // Create a data buffer:
+* var xbuf = [ 1.0, 2.0, -3.0, 4.0, -5.0, 6.0 ];
+*
+* // Define the shape of the input array:
+* var sh = [ 6 ];
+*
+* // Define the array strides:
+* var sx = [ 1 ];
+*
+* // Define the index offset:
+* var ox = 0;
+*
+* // Create an input ndarray:
+* var x = new ndarray( 'generic', xbuf, sh, sx, ox, 'row-major' );
+*
+* // Perform operation:
+* var out = findLastIndex( x, isEven );
+* // returns
+*
+* var idx = out.get();
+* // returns 1
+*/
+var findLastIndex = factory( table, [ idtypes ], odtypes, policies );
+
+
+// EXPORTS //
+
+module.exports = findLastIndex;
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/index.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/index.js
new file mode 100644
index 000000000000..ae725d001505
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/index.js
@@ -0,0 +1,74 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Return the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.
+*
+* @module @stdlib/blas/ext/find-last-index
+*
+* @example
+* var ndarray2array = require( '@stdlib/ndarray/to-array' );
+* var ndarray = require( '@stdlib/ndarray/ctor' );
+* var findLastIndex = require( '@stdlib/blas/ext/find-last-index' );
+*
+* function isEven( v ) {
+* return v % 2.0 === 0.0;
+* }
+*
+* // Create a data buffer:
+* var xbuf = [ 1.0, 2.0, -3.0, 4.0, -5.0, 6.0 ];
+*
+* // Define the shape of the input array:
+* var sh = [ 2, 3 ];
+*
+* // Define the array strides:
+* var sx = [ 3, 1 ];
+*
+* // Define the index offset:
+* var ox = 0;
+*
+* // Create an input ndarray:
+* var x = new ndarray( 'generic', xbuf, sh, sx, ox, 'row-major' );
+*
+* // Perform operation:
+* var out = findLastIndex( x, isEven );
+* // returns
+*
+* var arr = ndarray2array( out );
+* // returns [ -1, 1 ]
+*/
+
+// MODULES //
+
+var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
+var main = require( './main.js' );
+var assign = require( './assign.js' );
+
+
+// MAIN //
+
+setReadOnly( main, 'assign', assign );
+
+
+// EXPORTS //
+
+module.exports = main;
+
+// exports: { "assign": "main.assign" }
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/main.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/main.js
new file mode 100644
index 000000000000..c1d0768ec9d3
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/lib/main.js
@@ -0,0 +1,164 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var isFunction = require( '@stdlib/assert/is-function' );
+var isPlainObject = require( '@stdlib/assert/is-plain-object' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var format = require( '@stdlib/string/format' );
+var base = require( './base.js' );
+
+
+// MAIN //
+
+/**
+* Returns the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.
+*
+* @param {ndarrayLike} x - input ndarray
+* @param {Options} [options] - function options
+* @param {integer} [options.dim=-1] - dimension over which to perform operation
+* @param {boolean} [options.keepdims=false] - boolean indicating whether the reduced dimensions should be included in the returned ndarray as singleton dimensions
+* @param {string} [options.dtype] - output ndarray data type
+* @param {Function} clbk - callback function
+* @param {*} [thisArg] - callback execution context
+* @throws {TypeError} first argument must be an ndarray-like object
+* @throws {TypeError} options argument must be an object
+* @throws {RangeError} dimension index must not exceed input ndarray bounds
+* @throws {RangeError} first argument must have at least one dimension
+* @throws {Error} must provide valid options
+* @returns {ndarray} output ndarray
+*
+* @example
+* var ndarray2array = require( '@stdlib/ndarray/to-array' );
+* var ndarray = require( '@stdlib/ndarray/ctor' );
+*
+* function isEven( v ) {
+* return v % 2.0 === 0.0;
+* }
+*
+* // Create a data buffer:
+* var xbuf = [ 1.0, 2.0, -3.0, 4.0, -5.0, 6.0 ];
+*
+* // Define the shape of the input array:
+* var sh = [ 2, 3 ];
+*
+* // Define the array strides:
+* var sx = [ 3, 1 ];
+*
+* // Define the index offset:
+* var ox = 0;
+*
+* // Create an input ndarray:
+* var x = new ndarray( 'generic', xbuf, sh, sx, ox, 'row-major' );
+*
+* // Perform operation:
+* var out = findLastIndex( x, isEven );
+* // returns
+*
+* var arr = ndarray2array( out );
+* // returns [ -1, 1 ]
+*/
+function findLastIndex( x ) {
+ var hasOptions;
+ var options;
+ var nargs;
+ var opts;
+ var ctx;
+ var cb;
+ var sh;
+
+ nargs = arguments.length;
+ if ( !isndarrayLike( x ) ) {
+ throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
+ }
+ if ( nargs < 2 ) {
+ throw new TypeError( format( 'invalid argument. Function must be provided a callback function. Value: `%s`.', arguments[ 1 ] ) );
+ }
+
+ // Initialize an options object:
+ opts = {
+ 'dims': [ -1 ], // default behavior is to perform a reduction over the last dimension
+ 'keepdims': false
+ };
+
+ // Initialize a flag indicating whether an `options` argument was provided:
+ hasOptions = false;
+
+ // Case: findLastIndex( x, clbk )
+ if ( nargs === 2 ) {
+ cb = arguments[ 1 ];
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ }
+ // Case: findLastIndex( x, options, clbk ) or Case: findLastIndex( x, clbk, thisArg )
+ else if ( nargs < 4 ) {
+ options = arguments[ 1 ];
+ cb = arguments[ 2 ];
+ if ( isFunction( options ) ) {
+ cb = options;
+ ctx = cb;
+ } else {
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ hasOptions = true;
+ }
+ }
+ // Case: findLastIndex( x, options, clbk, thisArg )
+ else {
+ options = arguments[ 1 ];
+ hasOptions = true;
+ cb = arguments[ 2 ];
+ if ( !isFunction( cb ) ) {
+ throw new TypeError( format( 'invalid argument. Second argument must be a function. Value: `%s`.', cb ) );
+ }
+ ctx = arguments[ 3 ];
+ }
+ if ( hasOptions ) {
+ if ( !isPlainObject( options ) ) {
+ throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
+ }
+ // Resolve provided options...
+ if ( hasOwnProp( options, 'dim' ) ) {
+ opts.dims[ 0 ] = options.dim;
+ }
+ if ( hasOwnProp( options, 'keepdims' ) ) {
+ opts.keepdims = options.keepdims;
+ }
+ if ( hasOwnProp( options, 'dtype' ) ) {
+ opts.dtype = options.dtype;
+ }
+ }
+ // Resolve the list of non-reduced dimensions:
+ sh = getShape( x );
+ if ( sh.length < 1 ) {
+ throw new RangeError( 'invalid argument. First argument must have at least one dimension.' );
+ }
+ return base( x, opts, cb, ctx );
+}
+
+
+// EXPORTS //
+
+module.exports = findLastIndex;
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/package.json b/lib/node_modules/@stdlib/blas/ext/find-last-index/package.json
new file mode 100644
index 000000000000..014d763b900e
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/package.json
@@ -0,0 +1,62 @@
+{
+ "name": "@stdlib/blas/ext/find-last-index",
+ "version": "0.0.0",
+ "description": "Return the index of the last element along an ndarray dimension which passes a test implemented by a predicate function.",
+ "license": "Apache-2.0",
+ "author": {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ },
+ "contributors": [
+ {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ }
+ ],
+ "main": "./lib",
+ "directories": {
+ "benchmark": "./benchmark",
+ "doc": "./docs",
+ "example": "./examples",
+ "lib": "./lib",
+ "test": "./test"
+ },
+ "types": "./docs/types",
+ "scripts": {},
+ "homepage": "https://github.com/stdlib-js/stdlib",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/stdlib-js/stdlib.git"
+ },
+ "bugs": {
+ "url": "https://github.com/stdlib-js/stdlib/issues"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "engines": {
+ "node": ">=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "blas",
+ "find",
+ "index",
+ "callback",
+ "search",
+ "array",
+ "ndarray"
+ ],
+ "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.assign.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.assign.js
new file mode 100644
index 000000000000..7fd38b84b737
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.assign.js
@@ -0,0 +1,694 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var isSameArray = require( '@stdlib/assert/is-same-array' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var getDType = require( '@stdlib/ndarray/dtype' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var getOrder = require( '@stdlib/ndarray/order' );
+var getData = require( '@stdlib/ndarray/data-buffer' );
+var findLastIndex = require( './../lib' ).assign;
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {number} v - input value
+* @returns {boolean} result
+*/
+function clbk( v ) {
+ return v % 2.0 === 0.0;
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof findLastIndex, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object', function test( t ) {
+ var values;
+ var i;
+ var y;
+
+ y = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, y, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (thisArg)', function test( t ) {
+ var values;
+ var i;
+ var y;
+
+ y = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, y, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options)', function test( t ) {
+ var values;
+ var i;
+ var y;
+
+ y = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, y, {}, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options, thisArg)', function test( t ) {
+ var values;
+ var i;
+ var y;
+
+ y = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, y, {}, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a second argument which is not an ndarray-like object', function test( t ) {
+ var values;
+ var i;
+ var x;
+
+ x = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (thisArg)', function test( t ) {
+ var values;
+ var i;
+ var x;
+
+ x = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options)', function test( t ) {
+ var values;
+ var i;
+ var x;
+
+ x = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, {}, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options, thisArg)', function test( t ) {
+ var values;
+ var i;
+ var x;
+
+ x = zeros( [], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, {}, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided insufficient number of arguments', function test( t ) {
+ var x;
+ var y;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+ y = zeros( [], {
+ 'dtype': 'int32'
+ });
+
+ t.throws( badValue1, TypeError, 'throws an error when provided insufficient arguments' );
+ t.throws( badValue2, TypeError, 'throws an error when provided insufficient arguments' );
+ t.throws( badValue3, TypeError, 'throws an error when provided insufficient arguments' );
+ t.end();
+
+ function badValue1() {
+ findLastIndex( x );
+ }
+
+ function badValue2() {
+ findLastIndex( x, y );
+ }
+
+ function badValue3() {
+ findLastIndex();
+ }
+});
+
+tape( 'the function throws an error if provided an options argument which is not an object', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'generic'
+ };
+
+ x = zeros( [ 2, 2 ], opts );
+ y = zeros( [], opts );
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, y, value, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided an options argument which is not an object (thisArg)', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'generic'
+ };
+
+ x = zeros( [ 2, 2 ], opts );
+ y = zeros( [], opts );
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, y, value, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dim` option which is not an integer', function test( t ) {
+ var options;
+ var values;
+ var opts;
+ var x;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'generic'
+ };
+
+ x = zeros( [ 2, 2 ], opts );
+ y = zeros( [], opts );
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [ 'a' ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ options = {
+ 'dim': value
+ };
+ findLastIndex( x, y, options, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dim` option which is not an integer (thisArg)', function test( t ) {
+ var options;
+ var values;
+ var opts;
+ var x;
+ var y;
+ var i;
+
+ opts = {
+ 'dtype': 'generic'
+ };
+
+ x = zeros( [ 2, 2 ], opts );
+ y = zeros( [], opts );
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [ 'a' ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ options = {
+ 'dim': value
+ };
+ findLastIndex( x, y, options, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function returns the first index of an element which passes a test (row-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var x;
+ var y;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'row-major'
+ });
+
+ actual = findLastIndex( x, y, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.strictEqual( isSameArray( getData( actual ), expected ), true, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the first index of an element which passes a test (column-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var x;
+ var y;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'column-major'
+ });
+
+ actual = findLastIndex( x, y, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports specifying operation dimensions (row-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var opts;
+ var x;
+ var y;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'row-major'
+ });
+ opts = {
+ 'dim': 0
+ };
+
+ actual = findLastIndex( x, y, opts, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'row-major'
+ });
+ opts = {
+ 'dim': 1
+ };
+
+ actual = findLastIndex( x, y, opts, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports specifying an operation dimension (column-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var opts;
+ var x;
+ var y;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'column-major'
+ });
+ opts = {
+ 'dim': 0
+ };
+
+ actual = findLastIndex( x, y, opts, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'column-major'
+ });
+ opts = {
+ 'dims': 1
+ };
+
+ actual = findLastIndex( x, y, opts, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports providing an execution context', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var ctx;
+ var x;
+ var y;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ y = zeros( [ 2 ], {
+ 'dtype': 'generic',
+ 'order': 'row-major'
+ });
+ ctx = {
+ 'count': 0
+ };
+
+ actual = findLastIndex( x, y, clbk1, ctx );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.strictEqual( isSameArray( getData( actual ), expected ), true, 'returns expected value' );
+ t.strictEqual( ( y === actual ), true, 'returns expected value' );
+ t.strictEqual( ctx.count, 1, 'returns expected value' );
+
+ t.end();
+
+ function clbk1( v ) {
+ this.count += 1; // eslint-disable-line no-invalid-this
+ return v % 2.0 === 0.0;
+ }
+});
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.js
new file mode 100644
index 000000000000..429028745969
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.js
@@ -0,0 +1,39 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isMethod = require( '@stdlib/assert/is-method' );
+var findLastIndex = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof findLastIndex, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'attached to the main export is an `assign` method', function test( t ) {
+ t.strictEqual( isMethod( findLastIndex, 'assign' ), true, 'returns expected value' );
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.main.js b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.main.js
new file mode 100644
index 000000000000..0424a0ba8d99
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/find-last-index/test/test.main.js
@@ -0,0 +1,680 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var zeros = require( '@stdlib/ndarray/zeros' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var getDType = require( '@stdlib/ndarray/dtype' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var getOrder = require( '@stdlib/ndarray/order' );
+var findLastIndex = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {number} v - input value
+* @returns {boolean} result
+*/
+function clbk( v ) {
+ return v % 2.0 === 0.0;
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof findLastIndex, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (thisArg)', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options)', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, {}, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a first argument which is not an ndarray-like object (options, thisArg)', function test( t ) {
+ var values;
+ var i;
+
+ values = [
+ '5',
+ 5,
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( value, {}, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a second argument which is not a function', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'float64'
+ });
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a second argument which is not a function (thisArg)', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'float64'
+ });
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a second argument which is not a function (options)', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'float64'
+ });
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, {}, value );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a second argument which is not a function (options, thisArg)', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'float64'
+ });
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, {}, value, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided insufficient number of arguments', function test( t ) {
+ var x;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ t.throws( badValue1, TypeError, 'throws an error when provided insufficient arguments' );
+ t.throws( badValue2, TypeError, 'throws an error when provided insufficient arguments' );
+ t.end();
+
+ function badValue1() {
+ findLastIndex( x );
+ }
+
+ function badValue2() {
+ findLastIndex();
+ }
+});
+
+tape( 'the function throws an error if provided an options argument which is not an object', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided an options argument which is not an object (thisArg)', function test( t ) {
+ var values;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [],
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ findLastIndex( x, value, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dtype` option which is not a supported data type', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ 'bool',
+ 'float64',
+ 'float32',
+ 'boop'
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ opts = {
+ 'dtype': value
+ };
+ findLastIndex( x, opts, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dtype` option which is not a supported data type (thisArg)', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ 'bool',
+ 'float64',
+ 'float32',
+ 'boop'
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ opts = {
+ 'dtype': value
+ };
+ findLastIndex( x, opts, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dim` option which is not an integer', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [ 'a' ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ opts = {
+ 'dim': value
+ };
+ findLastIndex( x, opts, clbk );
+ };
+ }
+});
+
+tape( 'the function throws an error if provided a `dim` option which is not an integer (thisArg)', function test( t ) {
+ var values;
+ var opts;
+ var x;
+ var i;
+
+ x = zeros( [ 2, 2 ], {
+ 'dtype': 'generic'
+ });
+
+ values = [
+ '5',
+ NaN,
+ true,
+ false,
+ null,
+ void 0,
+ [ 'a' ],
+ {},
+ function noop() {}
+ ];
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ opts = {
+ 'dim': value
+ };
+ findLastIndex( x, opts, clbk, {} );
+ };
+ }
+});
+
+tape( 'the function returns the first index of an element which passes a test (row-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+
+ actual = findLastIndex( x, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function returns the first index of an element which passes a test (column-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+
+ actual = findLastIndex( x, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports specifying the operation dimension (row-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var opts;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ opts = {
+ 'dim': 0
+ };
+
+ actual = findLastIndex( x, opts, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ opts = {
+ 'dim': 1
+ };
+
+ actual = findLastIndex( x, opts, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports specifying the operation dimension (column-major)', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var opts;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+ opts = {
+ 'dim': 0
+ };
+
+ actual = findLastIndex( x, opts, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 1, 2 ], 0, 'column-major' );
+ opts = {
+ 'dim': 1
+ };
+
+ actual = findLastIndex( x, opts, clbk );
+ expected = [ -1, 0 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports specifying the output array data type', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var opts;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ opts = {
+ 'dtype': 'int32'
+ };
+
+ actual = findLastIndex( x, opts, clbk );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'int32', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports providing an execution context', function test( t ) {
+ var expected;
+ var actual;
+ var xbuf;
+ var ctx;
+ var x;
+
+ xbuf = [ -1.0, 2.0, -3.0, 4.0 ];
+ x = new ndarray( 'generic', xbuf, [ 2, 2 ], [ 2, 1 ], 0, 'row-major' );
+ ctx = {
+ 'count': 0
+ };
+
+ actual = findLastIndex( x, clbk1, ctx );
+ expected = [ 1, -1 ];
+
+ t.strictEqual( isndarrayLike( actual ), true, 'returns expected value' );
+ t.strictEqual( getDType( actual ), 'generic', 'returns expected value' );
+ t.deepEqual( getShape( actual ), [ 2 ], 'returns expected value' );
+ t.strictEqual( getOrder( actual ), getOrder( x ), 'returns expected value' );
+ t.deepEqual( ndarray2array( actual ), expected, 'returns expected value' );
+ t.strictEqual( ctx.count, 1, 'returns expected value' );
+
+ t.end();
+
+ function clbk1( v ) {
+ this.count += 1; // eslint-disable-line no-invalid-this
+ return v % 2.0 === 0.0;
+ }
+});