RTrim in jQuery

Question

I am having a problem with jQuery's trim. I have a string such at in jQuery:

var string1;
string1 = "one~two~";

How do I trim the trailing tilde?

jQuery *is* JavaScript. This has nothing to do with jQuery, it's just JavaScript. — gen_Eric, Jan 09 '12 at 16:08
If only there was a way to write javascript in jquery code somewhere... — Konerak, Jan 09 '12 at 16:08
Do you want a string without the tilde or an array with 'one' and 'two ? — js-coder, Jan 09 '12 at 16:08
@dotweb: He wants to trim the `~` from the end of the string. — gen_Eric, Jan 09 '12 at 16:09
possible duplicate of [javascript need to do a right trim](http://stackoverflow.com/questions/8141718/javascript-need-to-do-a-right-trim) — Pang, Nov 05 '14 at 08:45

Gabriele Petrioli · Accepted Answer · 2012-01-09T16:26:29.673

89

The .trim() method of jQuery refers to whitespace ..

Description: Remove the whitespace from the beginning and end of a string.

You need

string1.replace(/~+$/,'');

This will remove all trailing ~.

So one~two~~~~~ would also become one~two

edited Jan 09 '12 at 16:26

answered Jan 09 '12 at 16:09

Gabriele Petrioli

191,379
34
261
317

This will strip ~ at the beginning too, but just if there is a ~ at the end. – Armin Jan 09 '12 at 16:12
2

@Armin: No it won't. It matches one or more `~` followed by the end of the string. – gen_Eric Jan 09 '12 at 16:14
3

@armin, no it won't because of the `$` at the end. This means that the series of `~` must be at the end of the string.. – Gabriele Petrioli Jan 09 '12 at 16:14
I have tested it wrong (with global flag). Sorry! Nice expression :) – Armin Jan 09 '12 at 16:15
1

@Armin, no problem .. although it will not remove the leading `~` with global flag either :) You probably missed the `$` when testing.. – Gabriele Petrioli Jan 09 '12 at 16:17
I have testet with http://gskinner.com/RegExr/ But the "onkeydown" event seems to be buggy, when I changed the source value. – Armin Jan 09 '12 at 16:20
@T.J.Crowder [not only jQuery, but programming in general](http://en.wikipedia.org/wiki/Trimming_%28computer_programming%29) But i agree that, conceptually, trimming applies to much more :) – Gabriele Petrioli Jan 09 '12 at 16:21
@Armin, good to know :) (*maybe you could contact the author of the page*) – Gabriele Petrioli Jan 09 '12 at 16:23
@T.J.Crowder fair enough.. :) – Gabriele Petrioli Jan 09 '12 at 16:25
Great answer, deeply useful! – Jamie Dexter Feb 07 '13 at 12:35

score 10 · Answer 2 · answered Jan 09 '12 at 16:09

10

Just use the javascript replace to change the last string into nothing:

string1.replace(/~+$/g,"");

answered Jan 09 '12 at 16:09

Konerak

39,272
12
98
118

Javid · Answer 3 · 2020-03-04T15:20:40.740

IMO this is the best way to do a right/left trim and therefore, having a full functionality for trimming (since javascript supports string.trim natively)

String.prototype.rtrim = function (s) {
    if (s == undefined)
        s = '\\s';
    return this.replace(new RegExp("[" + s + "]*$"), '');
};
String.prototype.ltrim = function (s) {
    if (s == undefined)
        s = '\\s';
    return this.replace(new RegExp("^[" + s + "]*"), '');
};

Usage example:

var str1 = '   jav ~'
var r1 = mystring.rtrim('~'); // result = '   jav ' <= what OP is requesting
var r2 = mystring.rtrim(' ~'); // result = '   jav'
var r3 = mystring.ltrim();      // result = 'jav ~'

P.S. If you are specifying a parameter for rtrim or ltrim, make sure you use a regex-compatible string. For example if you want to do a rtrim by [, you should use: somestring.rtrim('\\[') If you don't want to escape the string manually, you can do it using a regex-escape function if you will. See the answer here.

score 4 · Answer 4 · answered Jan 09 '12 at 16:11

4

One option:

string1 = string1.substring(0,(string1.length-1));

long way around it .. and it jsut strips the last character .. not the tilde specifically..

answered Jan 09 '12 at 16:11

Silvertiger

1,680
2
19
32

1

He wants a function that functions like `Trim()` but with `~` instead of whitespace. – Devin Burke Jan 09 '12 at 16:11

score -1 · Answer 5 · answered Jan 09 '12 at 16:09

-1

var myStr = "One~Two~Three~Four~"     
var strLen = myStr.length;
myStr = myStr.slice(0,strLen-1);
alert (myStr);

This will delete the last character in the string. Is that what you wanted?

answered Jan 09 '12 at 16:09

Nick

1,262
1
17
32

score -3 · Answer 6 · answered Jan 09 '12 at 16:10

-3

string1 = string1.substring(0, string1.length - 1);

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/substring

answered Jan 09 '12 at 16:10

karim79

339,989
67
413
406

1

This would strip every char, which is the last one. This is not what he asked for! – Armin Jan 09 '12 at 16:13
2

Actually, he did not specify that, so his question is subject to interpretation. – karim79 Jan 09 '12 at 16:14

score -6 · Answer 7 · answered Jan 09 '12 at 16:11

-6

You can use substring javascript method.

Try this

var string1 = "one~two~";
string1 = $.trim(string1).substring(0, string1.length -1);

answered Jan 09 '12 at 16:11

ShankarSangoli

69,612
13
93
124

2

This will trim any character off the end of the input string, not only a ~ as requested. – Rylab Dec 04 '14 at 19:50

RTrim in jQuery

7 Answers7

Linked