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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 39x 39x 10x 10x 39x 1x 1x 39x 4x 4x 39x 2x 2x 22x 22x 39x 2x 2x 2x 2x 2x | /**
* @license Apache-2.0
*
* Copyright (c) 2026 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 isLayout = require( '@stdlib/blas/base/assert/is-layout' );
var resolveOrder = require( '@stdlib/blas/base/layout-resolve-enum' );
var max = require( '@stdlib/math/base/special/fast/max' );
var format = require( '@stdlib/string/format' );
var addon = require( './../src/addon.node' );
// MAIN //
/**
* Computes combinations of a specified length from double-precision floating-point strided array elements.
*
* @param {string} order - storage layout
* @param {NonNegativeInteger} N - number of indexed elements
* @param {NonNegativeInteger} k - number of elements to combine
* @param {boolean} replacement - boolean indicating whether to allow duplication in combination
* @param {Float64Array} x - input array
* @param {integer} strideX - stride length for `x`
* @param {Float64Array} out - output array
* @param {integer} LDO - stride length for the leading dimension of `out`
* @throws {TypeError} first argument must be a valid order
* @throws {RangeError} eighth argument must be greater than or equal to max(1,k)
* @returns {Float64Array} output array
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var x = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );
* var out = new Float64Array( 12 );
*
* dcombinations( 'row-major', 4, 2, false, x, 1, out, 2 );
* // out => <Float64Array>[ 1.0, 2.0, 1.0, 3.0, 1.0, 4.0, 2.0, 3.0, 2.0, 4.0, 3.0, 4.0 ]
*/
function dcombinations( order, N, k, replacement, x, strideX, out, LDO ) {
if ( !isLayout( order ) ) {
throw new TypeError( format( 'invalid argument. First argument must be a valid order. Value: `%s`.', order ) );
}
if ( LDO < max( 1, k ) ) {
throw new RangeError( format( 'invalid argument. Eighth argument must be greater than or equal to max(1,%d). Value: `%d`.', k, LDO ) );
}
if ( N <= 0 || k <= 0 ) {
return out;
}
if ( !replacement && k > N ) {
return out;
}
addon( resolveOrder( order ), N, k, replacement, x, strideX, out, LDO );
return out;
}
// EXPORTS //
module.exports = dcombinations;
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