time-to-botec

Benchmark sampling in different programming languages
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main.js (2597B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2021 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 isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
     24 var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
     25 var format = require( './../../format' );
     26 
     27 
     28 // MAIN //
     29 
     30 /**
     31 * Returns the part of a string after the last occurrence of a specified substring.
     32 *
     33 * @param {string} str - input string
     34 * @param {string} search - search value
     35 * @param {integer} [fromIndex=str.length] - index of last character to be considered beginning of a match
     36 * @throws {TypeError} first argument must be a string
     37 * @throws {TypeError} second argument must be a string
     38 * @throws {TypeError} third argument must be an integer
     39 * @returns {string} substring
     40 *
     41 * @example
     42 * var out = substringAfterLast( 'beep boop', 'b' );
     43 * // returns 'oop'
     44 *
     45 * @example
     46 * var out = substringAfterLast( 'beep boop', 'o' );
     47 * // returns 'p'
     48 *
     49 * @example
     50 * var out = substringAfterLast( 'Hello World', 'o' );
     51 * // returns 'rld'
     52 *
     53 * @example
     54 * var out = substringAfterLast( 'Hello World', '!' );
     55 * // returns ''
     56 *
     57 * @example
     58 * var out = substringAfterLast( 'Hello World', '' );
     59 * // returns ''
     60 *
     61 * @example
     62 * var out = substringAfterLast( 'beep boop baz', 'p b', 6 );
     63 * // returns 'oop baz'
     64 */
     65 function substringAfterLast( str, search, fromIndex ) {
     66 	var idx;
     67 	if ( !isString( str ) ) {
     68 		throw new TypeError( format( 'invalid argument. First argument must be a string. Value: `%s`.', str ) );
     69 	}
     70 	if ( !isString( search ) ) {
     71 		throw new TypeError( format( 'invalid argument. Second argument must be a string. Value: `%s`.', search ) );
     72 	}
     73 	if ( arguments.length > 2 ) {
     74 		if ( !isInteger( fromIndex ) ) {
     75 			throw new TypeError( format( 'invalid argument. Third argument must be a nonnegative integer. Value: `%s`.', fromIndex ) );
     76 		}
     77 		idx = str.lastIndexOf( search, fromIndex );
     78 	} else {
     79 		idx = str.lastIndexOf( search );
     80 	}
     81 	if ( idx === -1 ) {
     82 		return '';
     83 	}
     84 	return str.substring( idx+search.length );
     85 }
     86 
     87 
     88 // EXPORTS //
     89 
     90 module.exports = substringAfterLast;