All files / gfirst-index-less-than/lib accessors.js

65.85% Statements 54/82
100% Branches 1/1
0% Functions 0/1
65.85% Lines 54/82

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 831x 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) 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';
 
// MAIN //
 
/**
* Returns the index of the first element in a strided array which is less than a corresponding element in another strided array.
*
* @private
* @param {PositiveInteger} N - number of indexed elements
* @param {Object} x - first input array object
* @param {Collection} x.data - first input array data
* @param {Array<Function>} x.accessors - first array element accessors
* @param {integer} strideX - stride length for `x`
* @param {NonNegativeInteger} offsetX - starting index for `x`
* @param {Object} y - second input array object
* @param {Collection} y.data - second input array data
* @param {Array<Function>} y.accessors - second array element accessors
* @param {integer} strideY - stride length for `y`
* @param {NonNegativeInteger} offsetY - starting index for `y`
* @returns {integer} index
*
* @example
* var toAccessorArray = require( '@stdlib/array/base/to-accessor-array' );
* var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
*
* var x = [ 0.0, 0.0, 0.0, 0.0 ];
* var y = [ 0.0, 0.0, 1.0, 0.0 ];
*
* var idx = gfirstIndexLessThan( x.length, arraylike2object( toAccessorArray( x ) ), 1, 0, arraylike2object( toAccessorArray( y ) ), 1, 0 );
* // returns 2
*/
function gfirstIndexLessThan( N, x, strideX, offsetX, y, strideY, offsetY ) {
	var xbuf;
	var ybuf;
	var xget;
	var yget;
	var ix;
	var iy;
	var i;

	// Cache reference to array data:
	xbuf = x.data;
	ybuf = y.data;

	// Cache a reference to the element accessors:
	xget = x.accessors[ 0 ];
	yget = y.accessors[ 0 ];

	ix = offsetX;
	iy = offsetY;
	for ( i = 0; i < N; i++ ) {
		if ( xget( xbuf, ix ) < yget( ybuf, iy ) ) {
			return i;
		}
		ix += strideX;
		iy += strideY;
	}
	return -1;
}
 
 
// EXPORTS //
 
module.exports = gfirstIndexLessThan;