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* @license Apache-2.0
*
* Copyright (c) 2023 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 broadcastArray = require( '@stdlib/array/base/broadcast-array' );
// MAIN //
/**
* Applies a unary callback to elements in a broadcasted nested input array and assigns results to elements in a two-dimensional nested output array.
*
* @param {ArrayLikeObject<Array<Collection>>} arrays - array-like object containing one input nested array and one output nested array
* @param {ArrayLikeObject<NonNegativeIntegerArray>} shapes - array shapes
* @param {Callback} fcn - unary callback
* @returns {void}
*
* @example
* var ones2d = require( '@stdlib/array/base/ones2d' );
* var zeros2d = require( '@stdlib/array/base/zeros2d' );
*
* function scale( x ) {
* return x * 10.0;
* }
*
* var shapes = [
* [ 1, 2 ],
* [ 2, 2 ]
* ];
*
* var x = ones2d( shapes[ 0 ] );
* var y = zeros2d( shapes[ 1 ] );
*
* bunary2d( [ x, y ], shapes, scale );
*
* console.log( y );
* // => [ [ 10.0, 10.0 ], [ 10.0, 10.0 ] ]
*/
function bunary2d( arrays, shapes, fcn ) {
var dx0;
var dx1;
var S0;
var S1;
var i0;
var i1;
var j0;
var j1;
var x0;
var y0;
var sh;
var st;
var o;
var x;
var y;
sh = shapes[ 1 ];
S0 = sh[ 1 ];
S1 = sh[ 0 ];
if ( S0 <= 0 || S1 <= 0 ) {
return;
}
o = broadcastArray( arrays[ 0 ], shapes[ 0 ], sh );
x = o.data;
st = o.strides;
dx0 = st[ 1 ];
dx1 = st[ 0 ];
y = arrays[ 1 ];
j1 = 0;
for ( i1 = 0; i1 < S1; i1++ ) {
j0 = 0;
x0 = x[ j1 ];
y0 = y[ i1 ];
for ( i0 = 0; i0 < S0; i0++ ) {
y0[ i0 ] = fcn( x0[ j0 ] );
j0 += dx0;
}
j1 += dx1;
}
}
// EXPORTS //
module.exports = bunary2d;
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