Help with this regexp thingie plz!

[ka0n]

Hi guys,
I would like to know how to match [A-Z] or [0-9] in a string. If the string contains characters like * & % $ # @ ! and etc. regexp would have to return 0.

Thanks very much :]

[user]

[^A-Z0-9]

http://tcl.tk/man/tcl8.5/TclCmd/re_syntax.htm#M27

[ka0n]

Worked like a charm, I don't know why.. but worked, just can't understand regexp and regsub. But thanks alot!

[caesar]

regexp - Match a regular expression against a string.
regsub - Perform substitutions based on regular expression pattern matching.