time-to-botec

Benchmark sampling in different programming languages
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any_by_right.js (2197B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 The Stdlib Authors.
      5 *
      6 * Licensed under the Apache License, Version 2.0 (the "License");
      7 * you may not use this file except in compliance with the License.
      8 * You may obtain a copy of the License at
      9 *
     10 *    http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing, software
     13 * distributed under the License is distributed on an "AS IS" BASIS,
     14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15 * See the License for the specific language governing permissions and
     16 * limitations under the License.
     17 */
     18 
     19 'use strict';
     20 
     21 // MODULES //
     22 
     23 var isCollection = require( '@stdlib/assert/is-collection' );
     24 var isFunction = require( '@stdlib/assert/is-function' );
     25 
     26 
     27 // MAIN //
     28 
     29 /**
     30 * Tests whether at least one element in a collection passes a test implemented by a predicate function, iterating from right to left.
     31 *
     32 * @param {Collection} collection - input collection
     33 * @param {Function} predicate - test function
     34 * @param {*} [thisArg] - execution context
     35 * @throws {TypeError} first argument must be a collection
     36 * @throws {TypeError} second argument must be a function
     37 * @returns {boolean} boolean indicating whether at least one element passes a test
     38 *
     39 * @example
     40 * function isNegative( v ) {
     41 *     return ( v < 0 );
     42 * }
     43 *
     44 * var arr = [ -1, 1, 2, 3, 4 ];
     45 *
     46 * var bool = anyByRight( arr, isNegative );
     47 * // returns true
     48 */
     49 function anyByRight( collection, predicate, thisArg ) {
     50 	var out;
     51 	var len;
     52 	var i;
     53 	if ( !isCollection( collection ) ) {
     54 		throw new TypeError( 'invalid argument. First argument must be a collection. Value: `'+collection+'`.' );
     55 	}
     56 	if ( !isFunction( predicate ) ) {
     57 		throw new TypeError( 'invalid argument. Second argument must be a function. Value: `'+predicate+'`.' );
     58 	}
     59 	len = collection.length;
     60 	for ( i = len-1; i >= 0; i-- ) {
     61 		out = predicate.call( thisArg, collection[ i ], i, collection );
     62 		if ( out ) {
     63 			return true;
     64 		}
     65 		// Account for dynamically resizing a collection...
     66 		if ( len !== collection.length ) {
     67 			i += ( collection.length - len );
     68 			len = collection.length;
     69 		}
     70 	}
     71 	return false;
     72 }
     73 
     74 
     75 // EXPORTS //
     76 
     77 module.exports = anyByRight;