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Re: True or False? A Quick Reference Guide

by Juerd (Abbot)
on Sep 29, 2005 at 12:23 UTC ( #496065=note: print w/ replies, xml ) Need Help??


in reply to True or False? A Quick Reference Guide

A quicker reference ;)

0/FALSE: 0, "0", "", undef 1/TRUE: everything else AND OR XOR NOT 0&0=0 0|0=0 0^0=0 !0=1 0&1=0 0|1=1 0^1=1 !1=0 1&0=0 1|0=1 1^0=1 1&1=1 1|1=1 1^1=0 & | ^ ~ <-- bitwise && || ! <-- logical, high precedence and or xor not <-- logical, low precedence

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }


Comment on Re: True or False? A Quick Reference Guide
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Re^2: True or False? A Quick Reference Guide
by Juerd (Abbot) on Oct 25, 2005 at 06:43 UTC

    Perl 6:

    0/FALSE: 0, "0", "", undef ("0" is true if the type is Str) 1/TRUE: everything else AND OR XOR NOT +& +| +^ +^ <-- bitwise, numeric ~& ~| ~^ ~^ <-- bitwise, string ?& ?| ?^ ?^ <-- bitwise, boolean && || ^^ ! <-- logical, high precedence and or xor not <-- logical, low precedence
    • The difference between logical and bitwise boolean is that logical AND and OR return an operand, while bitwise AND and OR return boolean values (the original values are lost).
    • ?^/^^, and ?^/! are practically the same.
    • ^^ was missing in Perl 5.
    • +^, ~^, ?^ are both XOR and NOT, depending on whether they are used infix (in between) or prefix (in front).

    Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }

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