Make a regex that matches this:
aaGrest with matching groups [aa, G, rest]
bb with matching groups [bb]
I am trying to make Grest part optional this doesn't work:
^([a-z]{2}[a-z]?)[(P|G)(.*)]?
Ps: dont complicate stuff or downvote!
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user3995789
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you need **[(\[a-z\]{2})(?:(\[GP\])(\[a-z\]*))?](https://regex101.com/r/uV3tQ9/1)** – rock321987 May 21 '16 at 10:28
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Try this:
^([a-z]{2}[a-z]?)(?:(P|G)(.*))?
See live demo.
This uses a non-capturing group (syntax (?:...)) to group the optional part without forming a capturing group, which keeps the capturing groups numbered as 1, 2 and 3.
Square brackets form a character class, which isn't what you intended.
Bohemian
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what's the difference between [non-capturing group](http://stackoverflow.com/questions/3512471/what-is-a-non-capturing-group) and square brackets? – user3995789 May 21 '16 at 10:29