diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/README.md b/lib/node_modules/@stdlib/array/base/count-ifs/README.md
new file mode 100644
index 000000000000..28c07bdbf430
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/README.md
@@ -0,0 +1,157 @@
+
+
+# countIfs
+
+> Perform element-wise evaluation of one or more input arrays according to provided predicate functions and count the number of elements for which all predicates respectively return `true`.
+
+
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var countIfs = require( '@stdlib/array/base/count-ifs' );
+```
+
+#### countIfs( x0, predicate0\[, x1, predicate1\[, x2, predicate2\[, ...args]] )
+
+Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+
+```javascript
+function predicate0( value ) {
+ return ( value > 0 );
+}
+
+function predicate1( value ) {
+ return ( value < 3 );
+}
+
+var x0 = [ 0, 1, 0, 1, 2 ];
+var x1 = [ 2, 3, 1, 2, 5 ];
+
+var out = countIfs( x0, predicate0, x1, predicate1 );
+// returns 1
+```
+
+The function has the following parameters:
+
+- **x0**: first input array.
+- **predicate0**: first predicate function.
+- **x1**: second input array (_optional_).
+- **predicate1**: second predicate function (_optional_).
+- **x2**: third input array (_optional_).
+- **predicate2**: third predicate function (_optional_).
+- **args**: additional input arrays and corresponding predicate functions (_optional_).
+
+Each predicate function is provided three arguments:
+
+- **value**: current array element.
+- **index**: current array element index.
+- **arr**: the corresponding input array.
+
+
+
+
+
+
+
+
+
+## Notes
+
+- The function assumes that all input arrays have the same length.
+- The function supports array-like objects supporting the accessor protocol (e.g., [`Complex128Array`][@stdlib/array/complex128], [`Complex64Array`][@stdlib/array/complex64], etc).
+
+
+
+
+
+
+
+
+
+## Examples
+
+
+
+
+
+```javascript
+var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
+var isNegativeInteger = require( '@stdlib/assert/is-negative-integer' ).isPrimitive;
+var naryFunction = require( '@stdlib/utils/nary-function' );
+var countIfs = require( '@stdlib/array/base/count-ifs' );
+
+var x = discreteUniform( 10, -5, 5, {
+ 'dtype': 'int32'
+});
+console.log( x );
+
+var y = discreteUniform( 10, -5, 5, {
+ 'dtype': 'int32'
+});
+console.log( y );
+
+var out = countIfs( x, naryFunction( isPositiveInteger, 1 ), y, naryFunction( isNegativeInteger, 1 ) );
+console.log( out );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[@stdlib/array/complex128]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/array/complex128
+
+[@stdlib/array/complex64]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/array/complex64
+
+
+
+
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/benchmark/benchmark.length.js b/lib/node_modules/@stdlib/array/base/count-ifs/benchmark/benchmark.length.js
new file mode 100644
index 000000000000..13d9b2027fe3
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/benchmark/benchmark.length.js
@@ -0,0 +1,123 @@
+/**
+* @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 pow = require( '@stdlib/math/base/special/pow' );
+var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
+var uniform = require( '@stdlib/random/array/uniform' );
+var pkg = require( './../package.json' ).name;
+var countIfs = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* First predicate function.
+*
+* @private
+* @param {number} v - value
+* @returns {boolean} result
+*/
+function predicate0( v ) {
+ return v > 0.0;
+}
+
+/**
+* Second predicate function.
+*
+* @private
+* @param {number} v - value
+* @returns {boolean} result
+*/
+function predicate1( v ) {
+ return v < 0.0;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var x0 = uniform( len, -1.0, 1.0, {
+ 'dype': 'generic'
+ });
+ var x1 = uniform( len, -1.0, 1.0, {
+ 'dype': 'generic'
+ });
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var out;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ out = countIfs( x0, predicate0, x1, predicate1 );
+ if ( typeof out !== 'number' ) {
+ b.fail( 'should return a number' );
+ }
+ }
+ b.toc();
+ if ( !isNonNegativeInteger( out ) ) {
+ b.fail( 'should return a nonnegative integer' );
+ }
+ 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=generic,predicates=2,len='+len, f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/docs/repl.txt b/lib/node_modules/@stdlib/array/base/count-ifs/docs/repl.txt
new file mode 100644
index 000000000000..8a579394f41f
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/docs/repl.txt
@@ -0,0 +1,50 @@
+
+{{alias}}( x0, predicate0[, x1, predicate1[, x2, predicate2[, ...args]] )
+ Performs element-wise evaluation of one or more input arrays according to
+ provided predicate functions and counts the number of elements for which all
+ predicates respectively return `true`.
+
+ Each predicate function is provided three arguments:
+
+ - value: current array element.
+ - index: current array element index.
+ - arr: the corresponding input array.
+
+ Parameters
+ ----------
+ x0: ArrayLikeObject
+ First input array.
+
+ predicate0: Function
+ First predicate function.
+
+ x1: ArrayLikeObject (optional)
+ Second input array.
+
+ predicate1: Function (optional)
+ Second predicate function.
+
+ x2: ArrayLikeObject (optional)
+ Third input array.
+
+ predicate2: Function (optional)
+ Third predicate function.
+
+ ...args: ArrayLikeObject|Function (optional)
+ Additional input arrays and corresponding predicate functions.
+
+ Returns
+ -------
+ out: integer
+ Result.
+
+ Examples
+ --------
+ > function f1( v ) { return ( v > 0 ); };
+ > function f2( v ) { return ( v < 0 ); };
+ > var out = {{alias}}( [ 0, 1, 1 ], f1, [ 1, -1, -1 ], f2 )
+ 2
+
+ See Also
+ --------
+
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/index.d.ts b/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/index.d.ts
new file mode 100644
index 000000000000..75e471419bba
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/index.d.ts
@@ -0,0 +1,243 @@
+/*
+* @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 { Collection, AccessorArrayLike } from '@stdlib/types/array';
+
+/**
+* Input array.
+*/
+type InputArray = Collection | AccessorArrayLike;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @returns boolean indicating whether an element passes a test
+*/
+type Nullary = () => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @returns boolean indicating whether an element passes a test
+*/
+type Unary = ( value: T ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @returns boolean indicating whether an element passes a test
+*/
+type Binary = ( value: T, index: number ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param arr - input array
+* @returns boolean indicating whether an element passes a test
+*/
+type Ternary = ( value: T, index: number, arr: U ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param arr - input array
+* @returns boolean indicating whether an element passes a test
+*/
+type Predicate = Nullary | Unary | Binary | Ternary;
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param x0 - input array
+* @param predicate0 - predicate function
+* @returns result
+*
+* @example
+* function predicate0( v ) {
+* return v > 0;
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 1 ];
+*
+* var n = countIfs( x0, predicate0 );
+* // returns 3
+*/
+declare function countIfs = InputArray>( x0: U, predicate0: Predicate ): number;
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param x0 - first input array
+* @param predicate0 - first predicate function
+* @param x1 - second input array
+* @param predicate1 - second predicate function
+* @returns result
+*
+* @example
+* function predicate0( v ) {
+* return v > 0;
+* }
+*
+* function predicate1( v ) {
+* return v < 0;
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 1 ];
+* var x1 = [ -1, 2, 4, -5, -8 ];
+*
+* var n = countIfs( x0, predicate0, x1, predicate1 );
+* // returns 2
+*/
+declare function countIfs = InputArray>( x0: U, predicate0: Predicate, x1: U, predicate1: Predicate ): number;
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param x0 - first input array
+* @param predicate0 - first predicate function
+* @param x1 - second input array
+* @param predicate1 - second predicate function
+* @param x2 - third input array
+* @param predicate2 - third predicate function
+* @returns result
+*
+* @example
+* function predicate0( v ) {
+* return v > 0;
+* }
+*
+* function predicate1( v ) {
+* return v < 0;
+* }
+*
+* function predicate2( v ) {
+* return v % 2 === 0;
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 1 ];
+* var x1 = [ -1, -2, 4, 5, -8 ];
+* var x2 = [ 0, 4, 3, 2, 12 ];
+*
+* var n = countIfs( x0, predicate0, x1, predicate1 );
+* // returns 2
+*/
+declare function countIfs = InputArray>( x0: U, predicate0: Predicate, x1: U, predicate1: Predicate, x2: U, predicate2: Predicate ): number;
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param x0 - first input array
+* @param predicate0 - first predicate function
+* @param x1 - second input array
+* @param predicate1 - second predicate function
+* @param x2 - third input array
+* @param predicate2 - third predicate function
+* @param x3 - fourth input array
+* @param predicate3 - fourth predicate function
+* @returns result
+*
+* @example
+* function predicate0( v ) {
+* return v > 0;
+* }
+*
+* function predicate1( v ) {
+* return v < 0;
+* }
+*
+* function predicate2( v ) {
+* return v % 2 === 0;
+* }
+*
+* function predicate3( v ) {
+* return v % 2 !== 0;
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 1 ];
+* var x1 = [ -1, -2, 4, 5, -8 ];
+* var x2 = [ 0, 4, 3, 2, 12 ];
+* var x3 = [ 2, 9, 3, 6, 5 ];
+*
+* var n = countIfs( x0, predicate0, x1, predicate1, x3, predicate3 );
+* // returns 2
+*/
+declare function countIfs = InputArray>( x0: U, predicate0: Predicate, x1: U, predicate1: Predicate, x2: U, predicate2: Predicate, x3: U, predicate3: Predicate ): number;
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param x0 - first input array
+* @param predicate0 - first predicate function
+* @param x1 - second input array
+* @param predicate1 - second predicate function
+* @param x2 - third input array
+* @param predicate2 - third predicate function
+* @param x3 - fourth input array
+* @param predicate3 - fourth predicate function
+* @param x4 - fifth input array
+* @param predicate4 - fifth predicate function
+* @param args - additional input arrays and predicate functions
+* @returns result
+*
+* @example
+* function predicate0( v ) {
+* return v > 0;
+* }
+*
+* function predicate1( v ) {
+* return v < 0;
+* }
+*
+* function predicate2( v ) {
+* return v % 2 === 0;
+* }
+*
+* function predicate3( v ) {
+* return v % 2 !== 0;
+* }
+*
+* function predicate4( v ) {
+* return v === true;
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 1 ];
+* var x1 = [ -1, -2, 4, 5, -8 ];
+* var x2 = [ 0, 4, 3, 2, 12 ];
+* var x3 = [ 2, 9, 3, 6, 5 ];
+* var x4 = [ false, true, false, true, true ]
+*
+* var n = countIfs( x0, predicate0, x1, predicate1, x3, predicate3, x4, predicate4 );
+* // returns 2
+*/
+declare function countIfs = InputArray>( x0: U, predicate0: Predicate, x1: U, predicate1: Predicate, x2: U, predicate2: Predicate, x3: U, predicate3: Predicate, x4: U, predicate4: Predicate, ...args: Array> ): number;
+
+
+// EXPORTS //
+
+export = countIfs;
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/test.ts b/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/test.ts
new file mode 100644
index 000000000000..679095e2a9fd
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/docs/types/test.ts
@@ -0,0 +1,194 @@
+/*
+* @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.
+*/
+
+import toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
+import countIfs = require( './index' );
+
+/**
+* Tests whether a value is positive.
+*
+* @param value - input value
+* @returns boolean indicating whether an element is positive
+*/
+function isPositive( value: number ): boolean {
+ return ( value > 0 );
+}
+
+/**
+* Tests whether a value is negative.
+*
+* @param value - input value
+* @returns boolean indicating whether an element is negative
+*/
+function isNegative( value: number ): boolean {
+ return ( value < 0 );
+}
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ const x = [ 1, 2, 3 ];
+ const y = [ -1, -2, -3 ];
+
+ countIfs( x, isPositive ); // $ExpectType number
+ countIfs( x, isPositive, y, isNegative ); // $ExpectType number
+ countIfs( x, isPositive, x, isPositive, y, isNegative ); // $ExpectType number
+ countIfs( x, isPositive, x, isPositive, x, isPositive, y, isNegative ); // $ExpectType number
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, y, isNegative ); // $ExpectType number
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, isPositive, y, isNegative ); // $ExpectType number
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, isPositive, y, isNegative ); // $ExpectType number
+
+ countIfs( new Float64Array( x ), isPositive, new Float64Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Float32Array( x ), isPositive, new Float32Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Int32Array( x ), isPositive, new Int32Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Int16Array( x ), isPositive, new Int16Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Int8Array( x ), isPositive, new Int8Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Uint32Array( x ), isPositive, new Uint32Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Uint16Array( x ), isPositive, new Uint16Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Uint8Array( x ), isPositive, new Uint8Array( y ), isNegative ); // $ExpectType number
+ countIfs( new Uint8ClampedArray( x ), isPositive, new Uint8ClampedArray( y ), isNegative ); // $ExpectType number
+ countIfs( toAccessorArray( x ), isPositive, toAccessorArray( y ), isNegative ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not a collection...
+{
+ countIfs( 2, isPositive ); // $ExpectError
+ countIfs( false, isPositive ); // $ExpectError
+ countIfs( true, isPositive ); // $ExpectError
+ countIfs( {}, isPositive ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a second argument which is not a function...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, 'abc' ); // $ExpectError
+ countIfs( x, 2 ); // $ExpectError
+ countIfs( x, false ); // $ExpectError
+ countIfs( x, true ); // $ExpectError
+ countIfs( x, null ); // $ExpectError
+ countIfs( x, void 0 ); // $ExpectError
+ countIfs( x, {} ); // $ExpectError
+ countIfs( x, [] ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a third argument which is not a collection...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, 2, isNegative ); // $ExpectError
+ countIfs( x, isPositive, false, isNegative ); // $ExpectError
+ countIfs( x, isPositive, true, isNegative ); // $ExpectError
+ countIfs( x, isPositive, {}, isNegative ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a fourth argument which is not a function...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, 'abc' ); // $ExpectError
+ countIfs( x, isPositive, x, 2 ); // $ExpectError
+ countIfs( x, isPositive, x, false ); // $ExpectError
+ countIfs( x, isPositive, x, true ); // $ExpectError
+ countIfs( x, isPositive, x, null ); // $ExpectError
+ countIfs( x, isPositive, x, void 0 ); // $ExpectError
+ countIfs( x, isPositive, x, {} ); // $ExpectError
+ countIfs( x, isPositive, x, [] ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a fifth argument which is not a collection...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, 2, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, false, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, true, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, {}, isNegative ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a sixth argument which is not a function...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, x, 'abc' ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, 2 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, false ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, true ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, null ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, void 0 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, {} ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, [] ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a seventh argument which is not a collection...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, x, isPositive, 2, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, false, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, true, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, {}, isNegative ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an eighth argument which is not a function...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, 'abc' ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, 2 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, false ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, true ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, null ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, void 0 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, {} ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, [] ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a ninth argument which is not a collection...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, 2, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, false, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, true, isNegative ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, {}, isNegative ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a tenth argument which is not a function...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, 'abc' ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, 2 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, false ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, true ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, null ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, void 0 ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, {} ); // $ExpectError
+ countIfs( x, isPositive, x, isPositive, x, isPositive, x, isPositive, x, [] ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+ const x = [ 1, 2, 3 ];
+
+ countIfs(); // $ExpectError
+ countIfs( x ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/examples/index.js b/lib/node_modules/@stdlib/array/base/count-ifs/examples/index.js
new file mode 100644
index 000000000000..3b148e70f84b
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/examples/index.js
@@ -0,0 +1,38 @@
+/**
+* @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 isPositiveInteger = require( '@stdlib/assert/is-positive-integer' ).isPrimitive;
+var isNegativeInteger = require( '@stdlib/assert/is-negative-integer' ).isPrimitive;
+var naryFunction = require( '@stdlib/utils/nary-function' );
+var countIfs = require( './../lib' );
+
+var x = discreteUniform( 10, -5, 5, {
+ 'dtype': 'int32'
+});
+console.log( x );
+
+var y = discreteUniform( 10, -5, 5, {
+ 'dtype': 'int32'
+});
+console.log( y );
+
+var out = countIfs( x, naryFunction( isPositiveInteger, 1 ), y, naryFunction( isNegativeInteger, 1 ) ); // eslint-disable-line max-len
+console.log( out );
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/lib/index.js b/lib/node_modules/@stdlib/array/base/count-ifs/lib/index.js
new file mode 100644
index 000000000000..3b8632f51c67
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/lib/index.js
@@ -0,0 +1,51 @@
+/**
+* @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';
+
+/**
+* Perform element-wise evaluation of one or more input arrays according to provided predicate functions and count the number of elements for which all predicates respectively return `true`.
+*
+* @module @stdlib/array/base/count-ifs
+*
+* @example
+* var countIfs = require( '@stdlib/array/base/count-ifs' );
+*
+* function predicate0( value ) {
+* return ( value > 0 );
+* }
+*
+* function predicate1( value ) {
+* return ( value < 3 );
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 2 ];
+* var x1 = [ 2, 3, 1, 2, 5 ];
+*
+* var n = countIfs( x0, predicate0, x1, predicate1 );
+* // returns 1
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/lib/main.js b/lib/node_modules/@stdlib/array/base/count-ifs/lib/main.js
new file mode 100644
index 000000000000..3a4bb5d7ff3f
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/lib/main.js
@@ -0,0 +1,175 @@
+/**
+* @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 arraylike2object = require( '@stdlib/array/base/arraylike2object' );
+var zeroTo = require( '@stdlib/array/base/zero-to' );
+
+
+// FUNCTIONS //
+
+/**
+* Returns an array of indices corresponding to the elements of an input array which pass a test implemented by a predicate function.
+*
+* @private
+* @param {Collection} x - input array
+* @param {Array} idx - list of indices
+* @param {Function} predicate - predicate function
+* @returns {Array} updated list of indices
+*
+* @example
+* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
+* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
+* var zeroTo = require( '@stdlib/array/base/zero-to' );
+*
+* function predicate( v ) {
+* return ( v > 0 );
+* }
+*
+* var x = arraylike2object( toAccessorArray( [ -1, 2, 3, -4, 5 ] ) );
+* var idx = zeroTo( 5 );
+*
+* var out = accessors( x, idx, predicate );
+* // returns [ 1, 2, 4 ]
+*/
+function accessors( x, idx, predicate ) {
+ var buf;
+ var get;
+ var i;
+ var j;
+ var k;
+
+ buf = x.data;
+ get = x.accessors[ 0 ];
+
+ k = 0;
+ for ( i = 0; i < idx.length; i++ ) {
+ j = idx[ i ];
+ if ( predicate( get( buf, j ), j, buf ) ) {
+ idx[ k ] = j;
+ k += 1;
+ }
+ }
+ idx.length = k;
+ return idx;
+}
+
+/**
+* Returns an array of indices corresponding to the elements of an input array which pass a test implemented by a predicate function.
+*
+* @private
+* @param {Collection} x - input array
+* @param {Array} idx - list of indices
+* @param {Function} predicate - predicate function
+* @returns {Array} updated list of indices
+*
+* @example
+* var zeroTo = require( '@stdlib/array/base/zero-to' );
+*
+* function predicate( v ) {
+* return ( v > 0 );
+* }
+*
+* var x = [ -1, 2, 3, -4, 5 ];
+* var idx = zeroTo( 5 );
+*
+* var out = indexed( x, idx, predicate );
+* // returns [ 1, 2, 4 ]
+*/
+function indexed( x, idx, predicate ) {
+ var i;
+ var j;
+ var k;
+
+ k = 0;
+ for ( i = 0; i < idx.length; i++ ) {
+ j = idx[ i ];
+ if ( predicate( x[ j ], j, x ) ) {
+ idx[ k ] = j;
+ k += 1;
+ }
+ }
+ idx.length = k;
+ return idx;
+}
+
+
+// MAIN //
+
+/**
+* Performs element-wise evaluation of one or more input arrays according to provided predicate functions and counts the number of elements for which all predicates respectively return `true`.
+*
+* @param {Collection} x0 - first input array
+* @param {Function} predicate0 - first predicate function
+* @param {Collection} [x1] - second input array
+* @param {Function} [predicate1] - second predicate function
+* @param {Collection} [x2] - third input array
+* @param {Function} [predicate2] - third predicate function
+* @param {...(Collection|Function)} [args] - additional input arrays and predicate functions
+* @returns {NonNegativeInteger} result
+*
+* @example
+* function predicate0( value ) {
+* return ( value > 0 );
+* }
+*
+* function predicate1( value ) {
+* return ( value < 3 );
+* }
+*
+* var x0 = [ 0, 1, 0, 1, 2 ];
+* var x1 = [ 2, 3, 1, 2, 5 ];
+*
+* var n = countIfs( x0, predicate0, x1, predicate1 );
+* // returns 1
+*/
+function countIfs() {
+ var predicates;
+ var arrays;
+ var len;
+ var idx;
+ var x;
+ var i;
+
+ arrays = [];
+ predicates = [];
+ for ( i = 0; i < arguments.length; i += 2 ) {
+ arrays.push( arraylike2object( arguments[ i ] ) );
+ predicates.push( arguments[ i+1 ] );
+ }
+
+ len = arguments[ 0 ].length;
+ idx = zeroTo( len );
+ for ( i = 0; i < arrays.length; i++ ) {
+ x = arrays[ i ];
+ if ( x.accessorProtocol ) {
+ idx = accessors( x, idx, predicates[ i ] );
+ } else {
+ idx = indexed( x.data, idx, predicates[ i ] );
+ }
+ }
+ return idx.length;
+}
+
+
+// EXPORTS //
+
+module.exports = countIfs;
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/package.json b/lib/node_modules/@stdlib/array/base/count-ifs/package.json
new file mode 100644
index 000000000000..d09fedd5ebd4
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/package.json
@@ -0,0 +1,63 @@
+{
+ "name": "@stdlib/array/base/count-ifs",
+ "version": "0.0.0",
+ "description": "Perform element-wise evaluation of one or more input arrays according to provided predicate functions and count the number of elements for which all predicates respectively return `true`.",
+ "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",
+ "array",
+ "count",
+ "sum",
+ "summation",
+ "countif",
+ "countifs",
+ "range",
+ "total",
+ "truthy"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/array/base/count-ifs/test/test.js b/lib/node_modules/@stdlib/array/base/count-ifs/test/test.js
new file mode 100644
index 000000000000..bc5ef4b49f81
--- /dev/null
+++ b/lib/node_modules/@stdlib/array/base/count-ifs/test/test.js
@@ -0,0 +1,222 @@
+/**
+* @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 Complex128Array = require( '@stdlib/array/complex128' );
+var Int32Array = require( '@stdlib/array/int32' );
+var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
+var real = require( '@stdlib/complex/float64/real' );
+var imag = require( '@stdlib/complex/float64/imag' );
+var countIfs = require( './../lib' );
+
+
+// FUNCTIONS //
+
+function predicate0( value ) {
+ return value > 0;
+}
+
+function predicate1( value ) {
+ return value < 0;
+}
+
+function predicate2( value ) {
+ return value < 3;
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof countIfs, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=1,generic)', function test( t ) {
+ var actual;
+ var x0;
+
+ x0 = [ 0, 1, 0, 1, 2 ];
+ actual = countIfs( x0, predicate0 );
+
+ t.strictEqual( actual, 3, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=1,accessors)', function test( t ) {
+ var actual;
+ var x0;
+
+ x0 = toAccessorArray( [ 0, 1, 0, 1, 2 ] );
+ actual = countIfs( x0, predicate0 );
+
+ t.strictEqual( actual, 3, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=2,generic)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = [ 0, 1, 0, 1, 2 ];
+ x1 = [ 3, -4, -1, 2, -8 ];
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 2, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=2,accessors)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = toAccessorArray( [ 0, 1, 0, 1, 2 ] );
+ x1 = toAccessorArray( [ 3, -4, -1, 2, -8 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 2, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=2,real typed array)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = new Int32Array( [ 0, 1, 0, 1, 2 ] );
+ x1 = new Int32Array( [ 3, -4, -1, 2, -8 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 2, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=2,complex typed array)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = new Complex128Array( [ 3.0, 1.0, 1.0, 0.0, 3.0, 4.0, 0.0, 5.0 ] );
+ x1 = new Complex128Array( [ -2.0, -5.0, -3.0, 1.0, -5.0, -1.0, 0.0, 4.0 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 2, 'returns expected value' );
+ t.end();
+
+ function predicate0( value ) {
+ return (
+ real( value ) > 0 &&
+ imag( value ) > 0
+ );
+ }
+ function predicate1( value ) {
+ return (
+ real( value ) < 0 &&
+ imag( value ) < 0
+ );
+ }
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=3,generic)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+ var x2;
+
+ x0 = [ 0, 1, 0, 1, 2 ];
+ x1 = [ 3, -4, -1, 2, -8 ];
+ x2 = [ 1, 2, 3, 4, 5 ];
+ actual = countIfs( x0, predicate0, x1, predicate1, x2, predicate2 );
+
+ t.strictEqual( actual, 1, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function counts the number of elements in the input arrays which simultaneously pass tests implemented by predicate functions (narrays=3,accessors)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+ var x2;
+
+ x0 = toAccessorArray( [ 0, 1, 0, 1, 2 ] );
+ x1 = toAccessorArray( [ 3, -4, -1, 2, -8 ] );
+ x2 = toAccessorArray( [ 1, 2, 3, 4, 5 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1, x2, predicate2 );
+
+ t.strictEqual( actual, 1, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns `0` if no elements at the same indices pass tests implemented by predicate functions (generic)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = [ -3, -2, -5, -1 ];
+ x1 = [ 2, 4, 5, 8 ];
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 0, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns `0` if no elements at the same indices pass tests implemented by predicate functions (accessors)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = toAccessorArray( [ -3, -2, -5, -1 ] );
+ x1 = toAccessorArray( [ 2, 4, 5, 8 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, 0, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns the number of elements if all elements in every input array pass tests implemented by predicate functions (generic)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = [ 1, 1, 1, 1 ];
+ x1 = [ -1, -1, -1, -1 ];
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, x0.length, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function returns the number of elements if all elements in every input array pass tests implemented by predicate functions (accessors)', function test( t ) {
+ var actual;
+ var x0;
+ var x1;
+
+ x0 = toAccessorArray( [ 1, 1, 1, 1 ] );
+ x1 = toAccessorArray( [ -1, -1, -1, -1 ] );
+ actual = countIfs( x0, predicate0, x1, predicate1 );
+
+ t.strictEqual( actual, x0.length, 'returns expected value' );
+ t.end();
+});