time-to-botec

Benchmark sampling in different programming languages
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main.js (2214B)

      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 lowercase = require( '@stdlib/string/lowercase' );
     24 var replace = require( '@stdlib/string/replace' );
     25 var isString = require( './../../is-string' ).isPrimitive;
     26 
     27 
     28 // VARIABLES //
     29 
     30 var RE_NON_ALPHANUMERIC = /[^a-z0-9]/g;
     31 
     32 
     33 // FUNCTIONS //
     34 
     35 /**
     36 * Comparator function for sorting characters in ascending order.
     37 *
     38 * @private
     39 * @param {string} a - character
     40 * @param {string} b - character
     41 * @returns {number} comparison value
     42 */
     43 function ascending( a, b ) {
     44 	if ( a < b ) {
     45 		return -1;
     46 	}
     47 	if ( a === b ) {
     48 		return 0;
     49 	}
     50 	return 1;
     51 }
     52 
     53 
     54 // MAIN //
     55 
     56 /**
     57 * Tests if a value is an anagram.
     58 *
     59 * @param {string} str - comparison string
     60 * @param {*} x - value to test
     61 * @throws {TypeError} first argument must be a string primitive
     62 * @returns {boolean} boolean indicating if a value is an anagram
     63 *
     64 * @example
     65 * var bool = isAnagram( 'I am a weakish speller', 'William Shakespeare' );
     66 * // returns true
     67 *
     68 * @example
     69 * var bool = isAnagram( 'bat', 'tabba' );
     70 * // returns false
     71 */
     72 function isAnagram( str, x ) {
     73 	if ( !isString( str ) ) {
     74 		throw new TypeError( 'invalid argument. First argument must be a string primitive. Value: `' + str + '`.' );
     75 	}
     76 	if ( !isString( x ) ) {
     77 		return false;
     78 	}
     79 	str = lowercase( str );
     80 	str = replace( str, RE_NON_ALPHANUMERIC, '' );
     81 	x = lowercase( x );
     82 	x = replace( x, RE_NON_ALPHANUMERIC, '' );
     83 	if ( str.length !== x.length ) {
     84 		return false;
     85 	}
     86 	str = str.split( '' )
     87 		.sort( ascending )
     88 		.join( '' );
     89 	x = x.split( '' )
     90 		.sort( ascending )
     91 		.join( '' );
     92 	return ( str === x );
     93 }
     94 
     95 
     96 // EXPORTS //
     97 
     98 module.exports = isAnagram;