JavaScript return only regex from string

Question

This might be pretty simple, but I am having a hard time with it. Consider the following code:

var string = 'testingT#$^%#$ESTING__--232'
string = string.match(/^\w*$/)
if (string != null)
{
    string = string.join('')
    string = string.toUpperCase()
}
$('#my-input').val(string)

What I want to do, is to strip all characters that aren't alphanumeric or underscore from string, and then transform that string to uppercase.

So far I did that, it works perfectly if I don't add any special characters, but when I add - or ^ to it, for example, it deletes everything from #my-input

elclanrs · Accepted Answer · 2013-04-01 00:06:13Z

3

You can do this in one step:

string = string.replace(/[^\w]/g, '').toUpperCase();
console.log(string); //=> "TESTINGTESTING__232"

answered Apr 1, 2013 at 0:06

elclanrs

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Billy Moon · Accepted Answer · 2013-04-01 00:06:59Z

1

var string = string.replace(/[^a-zA-Z_0-9]/g,'').toUpperCase()

Also, do you need unicode? My regex will only match a-z, and not åÉø for example.

answered Apr 1, 2013 at 0:06

Billy Moon

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Comments

Ilia Sidorenko · Accepted Answer · 2013-04-01 00:15:16Z

1

You need use 'global' flag in regex and remove match restriction.

var str = 'testingT#$^%#$ESTING__--232';
str = str.match(/\w+/g);    
if (str !== null)
{
    str = str.join('');
    str = str.toUpperCase();
}
$('#my-input').val(str);

answered Apr 1, 2013 at 0:15

Ilia Sidorenko

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