CODEWITHSUNDEEP
javascript
user3568783
user3568783

Reputation:

How can I truncate a string and remove a trailing character if present?

I have a variable:

a = "test data";
a = "test data!";

How can I remove the '!' if it exists at the end of the string? If possible I am looking for a method that would be the most clean solution.

Upvotes: 0

Views: 273

Answers (3)

ByteSyzeBuddha
ByteSyzeBuddha

Reputation: 63

if you didn't want to use a regular expression, you could use this logic. The syntax below is in javascript, because I'm on a NodeJS kick these days, but you could tailor to any language.

function removeTrailExclamation(str) {
    return str.charAt(str.length-1) == '!' ? str.substring(0,str.length-1) : str;
}

If you're not comfortable with conditional operators

function removeTrailExclamation(str) {
    if(str.charAt(str.length-1) == '!') {
        return str.substring(0,str.length-1);
    } else {
        return str;
    }
}

Hope that helps!

Upvotes: 1

Srinath Mandava
Srinath Mandava

Reputation: 3462

if you want to replace only at the end... using substring

if(a.charAt(a.length - 1)=='!')
     a.substring(0, a.length - 1);

if every where..

a..replace(!, '');

Upvotes: 0

VisioN
VisioN

Reputation: 145408

The shortest way is to use regular expression with !$, which means "match exclamation ! mark right before the end $ of the string":

'test data!'.replace(/!$/, '');

Upvotes: 5

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