http://www.perlmonks.org?node_id=404974


in reply to print out keys of hash with carriage returns

Another variation
map{print RPTOUT "$_\n"} keys %tapeid;

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Re^2: print out keys of hash with carriage returns
by revdiablo (Prior) on Nov 03, 2004 at 22:50 UTC

    That is indeed another way to do the same thing, but many argue against using map in void context. In older versions of perl, it was inefficient, because it would build a list of return values. In newer versions of perl, it's just bad style.