Pick any of copious documentation, more jobs available than for Python and Ruby combined, availability on almost any platform you're likely to encounter, a testing culture unmatched by any other language of which I'm aware, and ~19,224 individual distributions freely available, installable, and usable from the CPAN.
Pick any of copious documentation, more jobs available than for Python and Ruby combined, availability on almost any platform you're likely to encounter, a testing culture unmatched by any other language of which I'm aware, and ~19,224 individual distributions freely available, installable, and usable from the CPAN.