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Re: tri-state flags

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From:
sthoenna
Date:
December 9, 2001 13:53
Subject:
Re: tri-state flags
Message ID:
g0vE8gzkg6QF092yn@efn.org
Bart Lateur <bart.lateur@pandora.be> wrote:
>	grep { defined && !$_ } FLAG

To extend that, if you want to test for (state(s)) use (code):

state	code
undef	!defined FLAG
0	grep defined && !$_, scalar FLAG;
1	FLAG
undef,0	!FLAG
undef,1	grep !defined || $_, scalar FLAG;
0,1	defined FLAG
undef,0,1	1 :)

Yuck.

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