Isolating match from a string RegexMatch

I don't know regex that well, but I know how to do this with tokenat and tokencount:

For x=1 to tokencount(sourceString, "[command]")
 Set s = tokenat(sourceString, loopindex, "[command]")
 Set functionName to tokenat(s, 0, "[/command]"
 Array push functionName 

Thanks this is just what I wanted, you misplaced some characters but I got it to work properly:

Edit:

Although on a second thought I think I want to isolate just the content of the command ignoring the [command][/command] like in Dop2000's example

Weird, it seems some escaping characters were left out when I copy/pasted from RegExr. (That tool is invaluable!)

To isolate what's between your tags you need to inspect capture group #2 as seen here :

However, Construct implementation of Regex is a bit lacking in that regard, you can't inspect capture groups while in global mode. You need to rexecute the Regex on each match individually without the "g" flag, which is quite a bother.

jobel Most programming language implements a "regular expression" interpreter that share more or less the same syntax... so one could say that regular expression is a language agnostic way to search for patterns in some text. It can be used for things like advanced searches\replaces, validation and so on.

If you're curious about it, this site should have you covered : regular-expressions.info/index.html

Magistross I remember years ago when I used to write shell scripts in (Bourne shell I think) I would do:

expr `1+1` (with tidles) or something like that..with grep maybe? I forget! but this seems different. I only know lower level programming languages maybe that's why its unfamiliar to me.

Thanks for the link!