Regex to remove last / if it exists as the last character in the string

Question

I would like a regular expression or otherwise some method to remove the last character in a string if and only if that character is '/'. How can I do it?

what language are you using? javascript? php? – Jeff Sep 29 '11 at 19:18 — Jeff, Sep 29 '11 at 19:18
@Jeff - Javascript, its on the tags my friend. – P.Brian.Mackey Sep 29 '11 at 19:20 — P.Brian.Mackey, Sep 29 '11 at 19:20

score 83 · Accepted Answer · answered Sep 29 '11 at 19:18

83

string = string.replace(/\/$/, "");

$ marks the end of a string. \/ is a RegExp-escaped /. Combining both = Replace the / at the end of a line.

answered Sep 29 '11 at 19:18

Rob W

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score 6 · Answer 2 · answered Sep 29 '11 at 19:25

Just to give an alternative:

var str="abc/";
str.substring(0, str.length - +(str.lastIndexOf('/')==str.length-1)); // abc

var str="aabb";
str.substring(0, str.length - +(str.lastIndexOf('/')==str.length-1)); // aabb

This plays off the fact the Number(true) === 1 and Number(false) === 0

score 3 · Answer 3 · answered Sep 29 '11 at 19:19

3

var str = //something;
if(str[str.length-1] === "/") {
    str = str.substring(0, str.length-1);
}

answered Sep 29 '11 at 19:19

Dennis

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score 2 · Answer 4 · answered Sep 29 '11 at 19:19

2

var str = "example/";
str = str.replace(/\/$/, '');

answered Sep 29 '11 at 19:19

daiscog

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score 2 · Answer 5 · answered Sep 29 '11 at 19:19

2

var t = "example/";
t.replace(/\/$/, ""));

answered Sep 29 '11 at 19:19

Larsenal

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score 1 · Answer 6 · answered Jan 27 '15 at 10:56

1

This is not regex but could solve your problem

var str = "abc/";

if(str.slice(-1) == "/"){
str = str.slice(0,-1)+ "";
}

answered Jan 27 '15 at 10:56

Chandrakant

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2

Instead of `str.slice(-1) == "/"` it might be cleaner to use `str.endsWith("/")`, – Guillaume F. Sep 23 '21 at 17:52

score 0 · Answer 7 · answered Oct 03 '16 at 16:40

$('#ssn1').keyup(function() {
      var val = this.value.replace(/\D/g, '');
      val = val.substr(0,9)
      val = val.substr(0,3)+'-'+val.substr(3,2)+'-'+val.substr(5,4)
      val = val.replace('--','').replace(/-$/g,'')
      this.value = val;
});

Regex to remove last / if it exists as the last character in the string

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