How to define a separator in string using regular expressions? [closed]

Question

I want a string, which must be in parentheses () and separated with a comma , something like: (aaa),(bbbb),(cccccccc)

How could I match that using regular expression?

Answer 1

You can try this

^(?!,)(,?\(\w+\))+$

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^ marks the beginning of string

$ marks the end of string

Both ^,$ are required else it would match in between

\w+ matches 1 to many of [a-zA-Z\d_]

,? would optionally match ,

^(?!,) would look for , at the beginning of string and if it finds it,it doesn't match further.If it doesn't find,it returns to the previous position i.e at the start of string