locutus
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Locutus other languages' standard libraries to JavaScript for fun and educational purposes
66 lines (65 loc) • 1.72 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.soundex = soundex;
function soundex(str) {
// discuss at: https://locutus.io/php/soundex/
// parity verified: PHP 8.3
// original by: Jonas Raoni Soares Silva (https://www.jsfromhell.com)
// original by: Arnout Kazemier (https://www.3rd-Eden.com)
// improved by: Jack
// improved by: Kevin van Zonneveld (https://kvz.io)
// bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
// bugfixed by: Kevin van Zonneveld (https://kvz.io)
// input by: Brett Zamir (https://brett-zamir.me)
// revised by: Rafał Kukawski (https://blog.kukawski.pl)
// example 1: soundex('Kevin')
// returns 1: 'K150'
// example 2: soundex('Ellery')
// returns 2: 'E460'
// example 3: soundex('Euler')
// returns 3: 'E460'
const input = String(str).toUpperCase();
if (!input) {
return '';
}
const sdx = [0, 0, 0, 0];
const m = {
B: 1,
F: 1,
P: 1,
V: 1,
C: 2,
G: 2,
J: 2,
K: 2,
Q: 2,
S: 2,
X: 2,
Z: 2,
D: 3,
T: 3,
L: 4,
M: 5,
N: 5,
R: 6,
};
let i = 0;
let s = 0;
let p = 0;
let c = input.charAt(i++);
while (c && s < 4) {
const j = m[c];
if (j) {
if (j !== p) {
sdx[s++] = p = j;
}
}
else {
s += Number(i === 1);
p = 0;
}
c = input.charAt(i++);
}
sdx[0] = input.charAt(0);
return sdx.join('');
}