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Re: Conditional Operator Confusion

by Herkum (Parson)
on Nov 29, 2006 at 13:17 UTC ( #586687=note: print w/replies, xml ) Need Help??


in reply to Conditional Operator Confusion

Try this instead,
for (1..10) { $x = $_ > 5 ? 'foo' : 'bar'; print "$_:$x\n"; }

Ah, I just noticed that you had tried that in your second example. The real issue that you had was that you were trying to treat a trinary operator like an if-else statement. I have tried that before and it just don't work! :)

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Re^2: Conditional Operator Confusion
by Melly (Hermit) on Nov 29, 2006 at 15:48 UTC

    Hey! The camel book told me it was just like an if-else (well, sort of). Hmm, I must admit that I'm still slightly in the dark here - none of the examples given so far help me understand exactly what is going on...

    map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e** 2-$d**2+$b);$c=$d**2+$e**2>4?_:0}1..99;print$c}0..59;print$/}0..20;
    Tom Melly, pm@tomandlu.co.uk

      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?

        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, pm@tomandlu.co.uk

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[Eily]: very useful default translation :P
[Eily]: BTW LanX, you should try typing a few random chars at the beginning of each message. This will prevent expansion :P
[LanX]: qwiud you sthink so?
[LanX]: zxwqbd good idea! :)
LanX embraces his new habit spqopiwjdnq
[ambrus]: qQUkZTmHTuKxStGT- BzTIK9gdudif7TkTLI t3mnF144UaAZjkknXY 8nN-QM19wHBsTrp5vB lEYU_Kksa7X1RIBB4x EWLD5X7SW3jGX5ryfN OMn_yL5FTdQxzjhtyX mKN9sjUCzBNHK5Rrp0 S2WMUvIb1i9aZFgjtq VR0GH1bjPMvm1G16iz hBqc1U6toPd4FbJOFj VsOeT745AN1_pO88rD SRAYKtBZwCZedESZmN mvutrOTHiSNwflB- pRfn_k
[Eily]: so far it seems to work
Your Mother reminds the monks they should be grateful not to share an office, lest they be subjugated to constant inanities like, "Czech please!"
[LanX]: what's strange is that the "Cowboy you said this already" message is missing #dqiwd
[LanX]: YM: BTW learn to mute your humanity

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