in reply to Re: Re: Trinary or If'n'Else?
in thread Trinary or If'n'Else?

I'm not sure I understand. As far as I can see, ?: and &&|| do the same thing: 
print 1 ? 'true' : 'false';     # True
print 1 && 'true' || 'false';   # True
print 0 ? 'true' : 'false';     # False
print 0 && 'true' || 'false';   # False

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In both a ? b : c and a && b || c, a is a boolean expression. What can ?: do that &&|| cannot?

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(tye)Re: Trinary or If'n'Else?
by tye (Sage) on Dec 22, 2000 at 09:32 UTC

    I quickly came up with at least two: 

      DB<1> x 0 && qw(t r u e) || qw(f a l s e)
0  'f'
1  'a'
2  'l'
3  's'
4  'e'
  DB<2> x 1 && qw(t r u e) || qw(f a l s e)
0  'e'
# Oops!
  DB<3> x 1 && 2 || "two"
0  2
  DB<4> x 1 && 0 || "two"
0  'two'
# Oops!

    [download]
    So "b" can't be a false value and can't be a list.

            - tye (but my friends call me "Tye")
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Re: Re: Re: Re: Trinary or If'n'Else?
by I0 (Priest) on Dec 24, 2000 at 03:20 UTC
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[d/l]

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