75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
/**
|
|
* @license Apache-2.0
|
|
*
|
|
* Copyright (c) 2020 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';
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Applies a nullary callback and assigns results to elements in a strided output array.
|
|
*
|
|
* @param {ArrayLikeObject<Collection>} arrays - array-like object containing one output array
|
|
* @param {NonNegativeIntegerArray} shape - array-like object containing a single element, the number of indexed elements
|
|
* @param {IntegerArray} strides - array-like object containing the stride length for the output array
|
|
* @param {NonNegativeIntegerArray} offsets - array-like object containing the starting index (i.e., index offset) for the output array
|
|
* @param {Callback} fcn - nullary callback
|
|
* @returns {void}
|
|
*
|
|
* @example
|
|
* var Float64Array = require( '@stdlib/array/float64' );
|
|
*
|
|
* function fill() {
|
|
* return 3.0;
|
|
* }
|
|
*
|
|
* var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
|
|
*
|
|
* var shape = [ x.length ];
|
|
* var strides = [ 1 ];
|
|
* var offsets = [ 0 ];
|
|
*
|
|
* nullary( [ x ], shape, strides, offsets, fill );
|
|
*
|
|
* console.log( x );
|
|
* // => <Float64Array>[ 3.0, 3.0, 3.0, 3.0, 3.0 ]
|
|
*/
|
|
function nullary( arrays, shape, strides, offsets, fcn ) {
|
|
var sx;
|
|
var ix;
|
|
var x;
|
|
var N;
|
|
var i;
|
|
|
|
N = shape[ 0 ];
|
|
if ( N <= 0 ) {
|
|
return;
|
|
}
|
|
ix = offsets[ 0 ];
|
|
sx = strides[ 0 ];
|
|
x = arrays[ 0 ];
|
|
for ( i = 0; i < N; i++ ) {
|
|
x[ ix ] = fcn();
|
|
ix += sx;
|
|
}
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = nullary;
|