time-to-botec/squiggle/node_modules/@stdlib/array/convert/lib/main.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

74 lines
1.9 KiB
JavaScript

/**
* @license Apache-2.0
*
* Copyright (c) 2018 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 isCollection = require( '@stdlib/assert/is-collection' );
var ctors = require( './../../ctors' );
// MAIN //
/**
* Converts an array to an array of a different data type.
*
* @param {Collection} x - array to convert
* @param {string} dtype - output data type
* @throws {TypeError} first argument must be an array-like object
* @throws {TypeError} second argument must be a recognized array data type
* @returns {(Array|TypedArray)} output array
*
* @example
* var arr = [ 1.0, 2.0, 3.0, 4.0 ];
* var out = convert( arr, 'float64' );
* // returns <Float64Array>[ 1.0, 2.0, 3.0, 4.0 ]
*/
function convert( x, dtype ) {
var ctor;
var out;
var len;
var i;
if ( !isCollection( x ) ) {
throw new TypeError( 'invalid argument. First argument must be an array-like object. Value: `' + x + '`.' );
}
len = x.length;
ctor = ctors( dtype );
if ( ctor === null ) {
throw new TypeError( 'invalid argument. Second argument must be a recognized array data type. Value: `' + dtype + '`.' );
}
if ( dtype === 'generic' ) {
out = [];
for ( i = 0; i < len; i++ ) {
out.push( x[ i ] ); // ensure "fast" elements
}
return out;
}
out = new ctor( len );
for ( i = 0; i < len; i++ ) {
out[ i ] = x[ i ];
}
return out;
}
// EXPORTS //
module.exports = convert;