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$ cat in.txt 1 22 3 -4 a b c d e f g h i j k l m n o $ perl -anle 'print "@F[map $#F-$_*2, 0..$#F/2]"' in.txt -4 22 a c f d j h o m k

But seriously, there are lots of ways to do this. Just one of many:

while (<>) { my @fields = split; for (my $i=$#fields; $i>=0; $i-=2) { print "$fields[$i] "; } print "\n"; }

Update: As for your code, I'd probably have used for instead of map, but other than that it's a decent solution. Just for fun, a different way to write that might be: ++$i&1 and print "$_ " for reverse split; although that might be getting a little too clever ;-) This is a fun exercise in TIMTOWTDI! Update 2: Changed wording a bit.


In reply to Re: printing every 2nd entry in a list backwards (updated) by haukex
in thread printing every 2nd entry in a list backwards by Anonymous Monk

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