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

The main thing about the trinary operator is that, quoting your case above, "a" is a logical expression; where as b and c may be any expressions that return a result compatible with what you are assigning the expression to (or the other way around, if you are assinging to the operator). While most of the examples mentioned are just simeple assignments ($fred = (some_condition)? $bar : $foo), the statement is much more powerful than that.

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Re: Re: Re: Trinary or If'n'Else?
by Anonymous Monk on Dec 22, 2000 at 09:09 UTC
    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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      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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