Perl, push onto trinary conditional operator?

Phil R Lawrenc
#1 / 5

push onto trinary conditional operator?

Camel 3.0 states you can assign to the conditional operator if both
the 2nd and 3rd args are legal lvalues and both are scalars or lists.

Thus:

0 1

So why doesn't this work:

empty array

Thanks!
Phil R. Lawrence

Sat, 08 Nov 2003 22:53:01 GMT

Uri Guttma
#2 / 5

push onto trinary conditional operator?

PRL> So why doesn't this work:

^ ^

that looks like a func, so that is all push sees. either wrap that and
the ,1 in () or put a + in front of the () to make it into an argument.

another solution is to use array refs:

that doesn't have the paren issues that your code has.

uri

--

SYStems ARCHitecture and Stem Development ------ http://www.stemsystems.com
Learn Advanced Object Oriented Perl from Damian Conway - Boston, July 10-11
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Sat, 08 Nov 2003 23:27:09 GMT

Greg Bac
#3 / 5

push onto trinary conditional operator?

: Thus:

:

: 0 1
:
: So why doesn't this work:

:

: empty array

I believe pre-5.6 perls understood this. You can do the same with
the following ugly workaround:

Greg
--
Isn't it curious how ``page'' has become a colloquial term for the word
``document'' in hypertext, in a medium that does not have pages anymore?
Do we reuse words as soon as they are freed up by technology? Do we reuse
those of whose destruction we can't bear to be reminded? -- Jutta Degener

Sat, 08 Nov 2003 23:28:15 GMT

Rafael Garcia-Suar
#4 / 5

push onto trinary conditional operator?

Phil R Lawrence wrote in comp.lang.perl.misc:

Quote:

} Camel 3.0 states you can assign to the conditional operator if both
} the 2nd and 3rd args are legal lvalues and both are scalars or lists.
}
} Thus:

}

} 0 1
}
}
} So why doesn't this work:

}

} empty array

push does not assign to its array argument. It modifies the array
contents.

An array ref does the job :

a:
b:1

a:1
b:

--
Rafael Garcia-Suarez / http://rgarciasuarez.free.fr/

Sat, 08 Nov 2003 23:29:51 GMT

Uri Guttma
#5 / 5

push onto trinary conditional operator?

RG> } So why doesn't this work:

RG> push does not assign to its array argument. It modifies the array
RG> contents.

and ?: will return an lvalue array. his problem was wrong paren
grouping. see my other post on this.

uri

--

SYStems ARCHitecture and Stem Development ------ http://www.stemsystems.com
Learn Advanced Object Oriented Perl from Damian Conway - Boston, July 10-11
Class and Registration info: http://www.sysarch.com/perl/OOP_class.html

Sat, 08 Nov 2003 23:42:38 GMT