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Re^2: grep flip flop (range operator)

by Anonymous Monk
on Sep 13, 2012 at 07:02 UTC ( #993383=note: print w/replies, xml ) Need Help??


in reply to Re: grep flip flop (range operator)
in thread grep flip flop (range operator)

Bingo. Thanks.

That "Range Operators" page I have now read in my console via perldoc -f ..

It dawned on me after posting that the first condition is never true and I came up with

$ perl -le " print for grep { my $what = scalar($Q++==0 ..($_ eq q{Q} +)); warn $what; $what } qw{ a b c Q r s }; " 1 at -e line 1. 2 at -e line 1. 3 at -e line 1. 4E0 at -e line 1. Warning: something's wrong at -e line 1. Warning: something's wrong at -e line 1. a b c Q

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Re^3: grep flip flop (range operator)
by frozenwithjoy (Priest) on Sep 13, 2012 at 07:34 UTC
    To make things a bit more readable, you could use the match-once operator like this:
    perl -le " print for grep ?? .. /Q/, @ARGV " a b c Q r s ___ a b c Q

      Uh-oh

      $ perldoc -f ?? No documentation for perl function '??' found

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