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in reply to Re^3: Stupid mistakes I repeatedly make
in thread Stupid mistakes I repeatedly make

You likely don't care how many times the replacement happened, but it's not uncommon to care about whether any replacements happened.
if (s/foo/bar/) { ... } else { ... }
(How many isn't even an issue unless you're using /g. It's just 1 or 0 — it replaced something or it didn't.)

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