Trim() function not working in ExtendScript. Is there a way to replicate the functioning?

[ajaatshatru]

The error message says that trim() is not a function. I am applying this function to a string.

[Peter Kahrel · Accepted solution]

Assuming that by trimming you mean deleting leading and trailing white space:

function trim (str) {
    return str.replace(/^\s+/,'').replace(/\s+$/,'');
}

Peter

[Indunil Ranawake]

Thank you for saving my day

[Peter Kahrel]

Or if you want to use it in the form 'myString.trim()', define this at the beginning of your script:

String.prototype.trim = function () {
    return this.replace(/^\s+/,'').replace(/\s+$/,'');
}

P.

[ajaatshatru]

Thanks a lot!

[Loic_Aigon1]

pkahrel a écrit:
Or if you want to use it in the form 'myString.trim()', define this at the beginning of your script:

1. String.prototype.trim=function(){
2. returnthis.replace(/^\s+/,'').replace(/\s+$/,'');
3. }

String.prototype.trim = function () {  return this.replace(/^\s+/,'').replace(/\s+$/,''); }

P.

Hi Peter,

It's generally better to check for the method availability especially for methods that could be possibly added natively in the future

if (Array.prototype.trim==null) Array.prototype.trim=function(){…

Loic

[Vamitul]

It's generally better to check for the method availability especially for methods that could be possibly added natively in the future

Loic, your optimism is admirable!

[agopaul]

Trim should also take care of new lines, carriage return, tabs, etc:

/**
 * Trim spaces, new lines  etc
 *
 * @param {string} str
 * @returns {string}
 */
function trim (str) {
  return str.replace(/(^[\s\n\r\t\x0B]+)|([\s\n\r\t\x0B]+$)/g, '');
}

[Loic_Aigon1]

What's left otherwise

[extendersGame]

So to consolidate advice/suggestions, something like this should be ideal for our goals right?

if (String.prototype.trim == null) String.prototype.trim = function () {return this.replace(/(^[\s\n\r\t\x0B]+)|([\s\n\r\t\x0B]+$)/g, '')};

Loic, I noticed you used Array.prototype instead of String.prototype.

Any particular reason? will giving Array a trim function also give it to String? Is there even a reason for arrays in general to use the trim function?

[Loic.Aigon]

Wow sorry fo rnot responding to this one. I just missed it. In case it's still worth it. There wasn't any consideration about array over string. I think I just bounced on the topic