Regex get array number

Question

I'm trying to isolate array name and array size from code. This example of expected input:

blah_blah[blahvar]
blah_ha[2]
blah_[]

I need to match names (blah_blah, blah_ha, blah_) and text inside brackets (blahvar, 2, ''). I have this regex:

([a-zA-z_]+)(\[[a-zA-Z_]*\])

But it's not working. Please help.

"It's not working" is never a good enough description of the problem. What's wrong? Does it match too much? Too little? Does it match the right things but you're having trouble extracting the groups? — Jon Skeet
– Jon Skeet, Commented Jul 2, 2012 at 6:00
This is probably not the cause of your problem, but first part of the regex ([a-zA-z_]+) has lowercase 'z' instead of uppercase 'Z' — mrzli
– mrzli, Commented Jul 2, 2012 at 6:08

gout · Accepted Answer · 2012-07-02 06:05:15Z

3

Use This regular expression

([\w]+)\[([\w]*)\]

Group 1 will match the array name and Group 2 will match the index

answered Jul 2, 2012 at 6:05

gout

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Comments

Ofer Zelig · Accepted Answer · 2012-07-02 06:00:12Z

2

You need to include numbers:

([a-zA-z_0-9]+)(\[[a-zA-Z_0-9]*\])

Without that, your second example blah_ha[2] won't catch (the others do).

A shorter version (that captures every word character (letters, digits, etc.):

(\w+)(\[\w*\])

answered Jul 2, 2012 at 6:00

Ofer Zelig

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