locutus/php/pcre/preg_replace.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.preg_replace = preg_replace;
function preg_replace(pattern, replacement, string) {
    // original by: rony2k6 (https://github.com/rony2k6)
    //   example 1: preg_replace('/xmas/i', 'Christmas', 'It was the night before Xmas.')
    //   returns 1: "It was the night before Christmas."
    //   example 2: preg_replace('/xmas/ig', 'Christmas', 'xMas: It was the night before Xmas.')
    //   returns 2: "Christmas: It was the night before Christmas."
    //   example 3: preg_replace('\/(\\w+) (\\d+), (\\d+)\/i', '$11,$3', 'April 15, 2003')
    //   returns 3: "April1,2003"
    //   example 4: preg_replace('/[^a-zA-Z0-9]+/', '', 'The Development of code . http://www.')
    //   returns 4: "TheDevelopmentofcodehttpwww"
    //   example 5: preg_replace('/[^A-Za-z0-9_\\s]/', '', 'D"usseldorfer H"auptstrasse')
    //   returns 5: "Dusseldorfer Hauptstrasse"
    const delimiter = pattern.charAt(0);
    const lastDelimiterIndex = pattern.lastIndexOf(delimiter);
    let _flag = pattern.substr(lastDelimiterIndex + 1);
    _flag = _flag !== '' ? _flag : 'g';
    const _pattern = pattern.substr(1, lastDelimiterIndex - 1);
    const regex = new RegExp(_pattern, _flag);
    const result = string.replace(regex, replacement);
    return result;
}