How to remove only numbers from the end of a string?

Question

I have the following code to get a string and alert it after removing only the last number. Currently I have the following code. But here, remove all the numbers in the string including numbers where at the middle of the string. But I need to remove only the numbers where at the end of the string.

Ex - String = "ABC_1_XY_20"
     alert -> "ABC_1_XY_"

I need to keep "1" But now I lost it as well. How can I fix this?

$("button").on("click", function(){
  var st = "ABC_1_XY_20".replace(/[\d\.]/g ,'');
  alert(st);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button>Click</button>

Note that `replace()` has nothing to do with jQuery. I've edited your question title as such. — Rory McCrossan, Feb 07 '19 at 10:05
You could also check [this question](https://stackoverflow.com/questions/27690005/remove-trailing-numbers-from-string-js-regexp) and [this one](https://stackoverflow.com/questions/45088488/removing-int-and-float-from-the-end-of-a-string-using-javascript-regex) too. — Pedro Corso, Feb 07 '19 at 10:37

score 3 · Accepted Answer · answered Feb 07 '19 at 10:02

3

To fix this use the $ character class to denote that the match should be made at the end of the string. It also makes the g modifier redundant. You can also use + to repeated number and . characters at the end of the string. Try this:

$("button").on("click", function() {
  var st = "ABC_1_XY_20".replace(/[\d\.]+$/, '');
  console.log(st);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button>Click</button>

answered Feb 07 '19 at 10:02

Rory McCrossan

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don need [ in your regex try \d+$ will do the same. – Álvaro Touzón Feb 07 '19 at 10:09
@ÁlvaroTouzón yes you do as the OP is replacing the `.` as well as the numbers. – Rory McCrossan Feb 07 '19 at 10:10
@DavidJohns no problem, glad to help – Rory McCrossan Feb 07 '19 at 10:11
1

Most of the characters enclosed by square brackets are already matched literally, thus the backslash behind the dot is unnecessary. – Pedro Corso Feb 07 '19 at 10:16

score 0 · Answer 2 · answered Feb 07 '19 at 10:03

0

try to do this, it removes the las digit(\d) from your string

var st = "ABC_1_XY_201".replace(/\d$/ ,'');
  console.log(st);

answered Feb 07 '19 at 10:03

Álvaro Touzón

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Note that the example in the question removes all the ending number and `.` characters, not just one of them – Rory McCrossan Feb 07 '19 at 10:04
not want to remove the last number?, want to remove all numbers at the end of string. Ok – Álvaro Touzón Feb 07 '19 at 10:07
1

Yes, need to remove all numbers at the end. I showed it in my example in the question. – David Johns Feb 07 '19 at 10:08

How to remove only numbers from the end of a string?

2 Answers2