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Re: when $$s =~ m/\G.../gc is too verbose

by chromatic (Archbishop)
on Feb 02, 2006 at 22:36 UTC ( #527478=note: print w/ replies, xml ) Need Help??

in reply to when $$s =~ m/\G.../gc is too verbose

Clever. I usually put a local in there though, just to avoid trouble.

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Re^2: when $$s =~ m/\G.../gc is too verbose
by stefp (Vicar) on Feb 03, 2006 at 00:09 UTC
    Oops, I forgot it. I always localize or lexicalize variables proper to a subroutine That's why I never noticed that $_ is not implicetely localized at the entry of a subroutine contrary to what I thought.

    Sadly, localizing *_ or $_ doesn't play well with reference shuffling of strings with positions.

    sub lexer { (*_) = @_; print $1 if m/\G(A)/gc || m/\G(B)/gc ; } my $a = "AB"; lexer \$a; ; lexer \$a;
    This prints "A" then "B"; If I add a local *_ or a local $_, at the entry of the lexer routine, that does not work anymore. So much for a cool trick.

    -- stefp

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