Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | /**
* @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.
*/
/* eslint-disable max-depth, max-len */
'use strict';
// MAIN //
/**
* Flattens a five-dimensional nested array according to a callback function.
*
* ## Notes
*
* - The function assumes that all nested arrays have the same length (i.e., the input array is **not** a ragged array).
*
* @param {Array<Array<Array<Array<Collection>>>>} x - input nested array
* @param {NonNegativeIntegerArray} shape - array shape
* @param {boolean} colexicographic - specifies whether to flatten array values in colexicographic order
* @param {Function} clbk - callback function
* @param {*} [thisArg] - callback execution context
* @returns {Array} flattened array
*
* @example
* function scale( v ) {
* return v * 2;
* }
*
* var x = [ [ [ [ [ 1, 2 ] ] ] ], [ [ [ [ 3, 4 ] ] ] ] ];
*
* var out = flatten5dBy( x, [ 2, 1, 1, 1, 2 ], false, scale );
* // returns [ 2, 4, 6, 8 ]
*
* @example
* function scale( v ) {
* return v * 2;
* }
*
* var x = [ [ [ [ [ 1, 2 ] ] ] ], [ [ [ [ 3, 4 ] ] ] ] ];
*
* var out = flatten5dBy( x, [ 2, 1, 1, 1, 2 ], true, scale );
* // returns [ 2, 6, 4, 8 ]
*/
function flatten5dBy( x, shape, colexicographic, clbk, thisArg ) {
var out;
var S0;
var S1;
var S2;
var S3;
var S4;
var i0;
var i1;
var i2;
var i3;
var i4;
var a0;
var a1;
var a2;
var a3;
// Extract loop variables:
S0 = shape[ 4 ]; // for nested arrays, the last dimensions have the fastest changing indices
S1 = shape[ 3 ];
S2 = shape[ 2 ];
S3 = shape[ 1 ];
S4 = shape[ 0 ];
// Initialize an output array:
out = [];
// Iterate over the array dimensions...
if ( colexicographic ) {
for ( i0 = 0; i0 < S0; i0++ ) {
for ( i1 = 0; i1 < S1; i1++ ) {
for ( i2 = 0; i2 < S2; i2++ ) {
for ( i3 = 0; i3 < S3; i3++ ) {
for ( i4 = 0; i4 < S4; i4++ ) {
out.push( clbk.call( thisArg, x[ i4 ][ i3 ][ i2 ][ i1 ][ i0 ], [ i4, i3, i2, i1, i0 ], x ) ); // equivalent to storing in column-major (Fortran-style) order
}
}
}
}
}
return out;
}
for ( i4 = 0; i4 < S4; i4++ ) {
a3 = x[ i4 ];
for ( i3 = 0; i3 < S3; i3++ ) {
a2 = a3[ i3 ];
for ( i2 = 0; i2 < S2; i2++ ) {
a1 = a2[ i2 ];
for ( i1 = 0; i1 < S1; i1++ ) {
a0 = a1[ i1 ];
for ( i0 = 0; i0 < S0; i0++ ) {
out.push( clbk.call( thisArg, a0[ i0 ], [ i4, i3, i2, i1, i0 ], x ) ); // equivalent to storing in row-major (C-style) order
}
}
}
}
}
return out;
}
// EXPORTS //
module.exports = flatten5dBy;
|