How to replace the second occurrence of a string in javascript

Question

I am trying to replace the second occurrence of a string in javascript. I'm using a regex to detect all the matches of the character that I'm looking for. The alert returns the same initial text.

text = 'BLABLA';
//var count = (texte.match(/B/g) || []).length;
var t=0;   
texte.replace(/B/g, function (match) {
t++;
return (t === 2) ? "Z" : match;
});
alert(text);

https://js.do/code/157264

js.do/code/157301

Patrick Roberts
– Patrick Roberts

2017-06-15 13:22:40 +00:00
Commented Jun 15, 2017 at 13:22 — Patrick Roberts
– Patrick Roberts, Commented Jun 15, 2017 at 13:22
text vs texte

Nina Scholz
– Nina Scholz

2017-06-15 13:27:35 +00:00
Commented Jun 15, 2017 at 13:27 — Nina Scholz
– Nina Scholz, Commented Jun 15, 2017 at 13:27

Yosvel Quintero · Accepted Answer · 2021-09-01 05:04:38Z

36

It's because you never use the result returned by the replace function.

Here's the corrected code:

const text = 'BLABLA'
let t = 0
const result = text.replace(/B/g, match => ++t === 2 ? 'Z' : match)

console.log(result)

edited Sep 1, 2021 at 5:04

Yosvel Quintero

19.1k5 gold badges39 silver badges47 bronze badges

answered Jun 15, 2017 at 13:23

ADreNaLiNe-DJ

4,8994 gold badges28 silver badges35 bronze badges

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