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Re^3: Wrong idioms

by LanX (Canon)
on Mar 31, 2013 at 00:33 UTC ( #1026311=note: print w/ replies, xml ) Need Help??

in reply to Re^2: Wrong idioms
in thread Wrong idioms

Update: Post recomposed for better readability

> Also - what other languages treat "0" as false?

  • JavaScript

    Num yes Str no

    >>> !! 0 false >>> !! "0" true

  • Python

    Num yes Str no

    >>> not not 0 False >>> not not "0" True

  • Ruby

    Num no Str no

    irb(main):002:0> !! 0 => true irb(main):003:0> !! "0" (irb):3: warning: string literal in condition => true

  • Perl

    Num yes Str yes

    DB<102> !! 0 => "" DB<103> !! "0" => ""

    Cheers Rolf

    ( addicted to the Perl Programming Language)

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