regular expression to exclude spaces in string

[slipstick]

Now that I'm cross-eyed, I need help with a regular expression.

These need to pass (or permutations thereof):

[00123]

[R012]

[r083]

These need to fail (or permutations thereof):

[test]

[I was here]

[098 876]

[29873 eifvuh]ouh]

I have most of it ( the '[' has to be first; the ']' has to be last; there have to be numbers in the middle, but I can't write an expression that fails if there is 1 or more spaces in the string.

Thanks!

Tay

[aeastet]

DO you need it to fail only on sapces? If so then the first one in the fial group would pass [test]

[slipstick]

It needs to fail if there are 1 or more spaces, and if there are no numbers, and actually if there is more than one letter, so [test] needs to fail.

Tay

Message Edited by slipstick on 11-20-2009 11:54 AM

[Darin.K · Accepted solution]

Several possibilities:  Try this regular expression.

^\[[a-zA-Z]*[0-9]+[a-zA-Z0-9]*\]$

[aeastet]

Here is what I would do.

[aeastet]

Darin.K's version is easier

[slipstick]

The filter string is an approach I hadn't thought of. I'll keep it in mind for the future. Both great solutions! Thanks! Tay