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Is there a way to test if a regular expression ‘contains’ another regular expression?
For example:
RegEX1 = 'a.*b'; RegEx2 = 'a1.*b'; RegEX1 ‘contains’ RegEX2.
As far as I know – this can’t be done, am I wrong?
OK, joel.neely has shown that it can be done (haven’t read it yet…) academically.
Can it be done in a programming language, say C# ?
How effective will that be? How long will it take to test 1000 pairs?
Yes.
This paper contains a detailed discussion of the topic (see section 4.4).