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Re^3: Conditional Operator Confusion

by Herkum (Parson)
on Nov 30, 2006 at 16:44 UTC ( #586999=note: print w/replies, xml ) Need Help??

in reply to Re^2: Conditional Operator Confusion
in thread Conditional Operator Confusion

The trinary is much like any other operator, for example ==. Lets try this example,

my $result = $a == $b

Here, you get the result of the == operator, is $a equal $b. If they match it returns true, if they don't match it returns false.

The trinary works in a similar manner except you are setting the value returned instead of the implied value of other operators.

my $result = $a == $b ? 1 : 0;

This does the same thing as the first example, except you are explicitly setting the value returned. Does this help?

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Re^4: Conditional Operator Confusion
by Melly (Hermit) on Nov 30, 2006 at 17:03 UTC

    Not really... I'm sure I'm being really dumb here, but I still don't understand, in the following example, why $x gets set to "FALSE"... just very, very confused...

    1==1?$x='TRUE':$y='FALSE'; print "x=$x\n";
    Tom Melly,

      The conditional operator has higher precedence than the assignment operator, so
      is the same as

      The addition operator has higher precedence than the conditional operator, so
      is the same as

      If you want to do assignments, use if or add parens. Think of as the conditional operator as an operator that returns something.

        Thanks - I think I've finally got it (with some help from the chatterbox as well).

        All of which goes to confirm something a coworker once told me..

        Me: What's the precedence in <lang> for these operators?
        CW: Who cares? Use brackets - it's easier to read and
            you won't get screwed...
        Tom Melly,

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