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Editorial Team
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Asked: 2026-06-05T08:25:07+00:00

I’m trying to verify a string matches a certain pattern: #:XY1:XY2:ABC:::xy:: The part #:XY1

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I’m trying to verify a string matches a certain pattern:

#:XY1:XY2:ABC:::xy::

The part #:XY1 is required, the fields and separators after that are optional. But if the third field is there, it has to be ABC. I am trying it like this:

^#:[^:]+:?([^:]+)?:?(ABC)?:?([^:]*:?)*$

But it matches also lines, which don’t exactly have ABC as third field.

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1 Answer

  1. Editorial Team

    Please try this:

    ^#((((:[^:]+))((:[^:]*))?)|((((:[^:]+))(:[^:]*))((:(ABC)?)(:[^:]*)*)?))$
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