docs: add example using little-endian arrays

Author: kgryte

lib/node_modules/@stdlib/blas/base/daxpy-wasm/examples/little_endian_arrays.js

@@ -0,0 +1,74 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 hasWebAssemblySupport = require( '@stdlib/assert/has-wasm-support' );
+var Memory = require( '@stdlib/wasm/memory' );
+var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
+var gfill = require( '@stdlib/blas/ext/base/gfill' );
+var gfillBy = require( '@stdlib/blas/ext/base/gfill-by' );
+var bytesPerElement = require( '@stdlib/ndarray/base/bytes-per-element' );
+var Float64ArrayLE = require( '@stdlib/array/little-endian-float64' );
+var daxpy = require( './../lib' );
+
+function main() {
+	if ( !hasWebAssemblySupport() ) {
+		console.error( 'Environment does not support WebAssembly.' );
+		return;
+	}
+	// Create a new memory instance with an initial size of 10 pages (640KiB) and a maximum size of 100 pages (6.4MiB):
+	var mem = new Memory({
+		'initial': 10,
+		'maximum': 100
+	});
+
+	// Create a BLAS routine:
+	var mod = new daxpy.Module( mem );
+	// returns <Module>
+
+	// Initialize the routine:
+	mod.initializeSync(); // eslint-disable-line node/no-sync
+
+	// Define a vector data type:
+	var dtype = 'float64';
+
+	// Specify a vector length:
+	var N = 5;
+
+	// Define pointers (i.e., byte offsets) for storing two vectors:
+	var xptr = 0;
+	var yptr = N * bytesPerElement( dtype );
+
+	// Create typed array views over module memory:
+	var x = new Float64ArrayLE( mod.memory.buffer, xptr, N );
+	var y = new Float64ArrayLE( mod.memory.buffer, yptr, N );
+
+	// Write values to module memory:
+	gfillBy( N, x, 1, discreteUniform( -10.0, 10.0 ) );
+	gfill( N, 1.0, y, 1 );
+
+	// Perform computation:
+	mod.ndarray( N, 5.0, xptr, 1, 0, yptr, 1, 0 );
+
+	// Print the results:
+	console.log( 'x[:] = [%s]', x.toString() );
+	console.log( 'y[:] = [%s]', y.toString() );
+}
+
+main();