Silly me, I forgot what the problem was and mistated it. The problem is that the string I am searching for can exist as a substring of another element of @contexts, but I don't want it to match if it's already been rewritten.

For example in the list I am looping through, one element could be demo-outgoing, and a later element could be demo. I don't want the string demo in the already formatted string __user__demo-outgoing__ to be matched and rewritten again.

Does that make sense?

In reply to Re^2: Regex help by snacktime
in thread Regex help by snacktime

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