I wonder if you'd care to suggest how we could improve the documentation for s/// to make it more obvious how to solve your problem. Currently the documentation says this:

Searches a string for a pattern, and if found, replaces that pattern with the replacement text and returns the number of substitutions made. Otherwise it returns false (specifically, the empty string).

Update: s///, not chdir...

In reply to Re: Replacement regular expression which return the number of replacement it does by Corion
in thread Replacement regular expression which return the number of replacement it does by Anonymous Monk

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