I'd just like to point out that your comma adding logic is somewhat flawed. The following regexp from Friedl puts commas in a number without recursion... 
s/(?<=\d)(?=(?:\d\d\d)+$)/,/g

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It is only when you need to replace within what you substituted that you usually need recursive replacement...

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In reply to Re: s/// only replacing most of the time... by suaveant
in thread s/// only replacing most of the time... by mdunnbass

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