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Re: Re: Re: Anyone use "xor" in conditionals?

by sauoq (Abbot)
on Jul 14, 2003 at 17:05 UTC ( #274050=note: print w/ replies, xml ) Need Help??


in reply to Re: Re: Anyone use "xor" in conditionals?
in thread Anyone use "xor" in conditionals?

This way the conditions are evaluated less times

Eh? Not so.

$ perl -le 'print "T" if (print "foo" xor print "bar")' foo bar $ perl -le 'print "T" if ((print "foo" and not print "bar") or (not pr +int "foo" and print "bar"))' foo bar foo
At best, the expanded version will result in the same number of evaluations.

-sauoq
"My two cents aren't worth a dime.";


Comment on Re: Re: Re: Anyone use "xor" in conditionals?
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Re: Re: Re: Re: Anyone use "xor" in conditionals?
by Excalibor (Monk) on Jul 14, 2003 at 19:08 UTC

    Hi there,

    I was, of course, talking about the first extended version offered by Abigail:

    $ perl -le 'print "T" if ((print "foo" or print "bar") and (not (prin +t "foo" and print "bar"))' foo foo bar

    More specifically, I was talking in the case A is false (messier to write with print() as a one liner, left as an exercise for the reader :-)

    The point is, once you got the better, downlevel operator, use it if you need it! But no more than that.

    best regards,

    --
    our $Perl6 is Fantastic;

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