The substitution operator s returns the list of captured substrings or, in scalar context, the number of captured substrings, which is 1.

This isn't true. s/// always returns the number of substitutions made or the empty string if no substitutions were made (see perlop). The expression in map is in list context.

In reply to Re^2: Newbie: parentheses, map, etc. by kyle
in thread Newbie: parentheses, map, etc. by nefigah

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