If all you want in the end is a percentage, you may want to look up established string similarity algorithms. See for example the perl module String::Similarity.

If you are willing to look outside perl, see e.g. https://github.com/adrg/strutil and references therein.

In reply to Re: Compare two strings of same length, character-by-character by kikuchiyo
in thread Compare two strings of same length, character-by-character by Anonymous Monk

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