Write a sub. It is "not nearly as 'clever' as one might think" to write a regex one-liner. A clearly commented subroutine, that includes whatever if-statements it may need to clearly and obviously do its job, is much to be preferred.

In reply to Re^4: RegEx to remove leading zeros from a hex number by Anonymous Monk
in thread RegEx to remove leading zeros from a hex number by Karger78

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