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* @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 first index of an element in a double-precision floating-point strided array which is less than a specified search element using alternative indexing semantics.
*
* ## Notes
*
* - If unable to find an element which is less than the search element, the function returns `-1`.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {number} searchElement - search element
* @param {Float64Array} x - input array
* @param {integer} strideX - stride length
* @param {NonNegativeInteger} offsetX - starting index
* @returns {integer} index
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var x = new Float64Array( [ 1.0, 1.0, 0.0, 1.0 ] );
*
* var idx = dindexOfLessThan( x.length, 1.0, x, 1, 0 );
* // returns 2
*/
function dindexOfLessThan( N, searchElement, x, strideX, offsetX ) {
var ix;
var i;
if ( N <= 0 ) {
return -1;
}
ix = offsetX;
for ( i = 0; i < N; i++ ) {
if ( x[ ix ] < searchElement ) {
return i;
}
ix += strideX;
}
return -1;
}
// EXPORTS //
module.exports = dindexOfLessThan;
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