Regex to validate textfield with csv format using javascript

Question

I tried with the following regular expression

/^([a-z0-9])+(,[a-z0-9]+)*$/

My text field string looks like the following csv format as

123,456,789,012

But the above expressions fails for me, main thing is whitespaces are not allowed with the given text field string.

http://stackoverflow.com/questions/6432408/regular-expression-to-match-csv-delimiters — Parfait, Jan 24 '14 at 05:41
@ Sujith PS (123, 234, 345) be a invalid pattern and {123,345,567} be a valid one — Pez, Jan 24 '14 at 08:03
@Pez So you dont want to allow whitespace , right . what about ( ) and { } ?? — Sujith PS, Jan 24 '14 at 09:51

score 4 · Accepted Answer · answered Jan 24 '14 at 09:58

If you want to validate textfield with value like csv format ,

you can use : /^([a-z0-9]+(?:,[a-z0-9]+)*)$/gm

Which will accept 123,456,789,012

And will reject 123, 456, 789, 012 // Those containing spaces
If you want to match something like this (num,num,num,num)

you can use :

/^($[a-z0-9]+(?:,[a-z0-9]+)*$)$/gm

Explanation :

enter image description here

score 1 · Answer 2 · answered Jan 24 '14 at 05:41

1

If I understand you correctly, here's the version with white-spaces allowed:

var pattern = /^[a-z0-9]+(?:, ?[a-z0-9]+)*$/;
!!pattern.exec('123,456,789,012'); // true
!!pattern.exec('123, 456, 789, 012'); // true

answered Jan 24 '14 at 05:41

ikaruss

2 Answers2