In another node i was replying and i wrote a piece of code which was not working. after some changes i made it work but i didn't figured out why wasn't. after some meditation i came up asking a friend, and seems like what didn't worked for me, worked for him.

i knew (but i checked perlop) that the ternary operator can be used as an lvalue (e.g.: $cond ? $a : $b = 0) and i expected it had worked on push too: 

push $cond>0 ? @a : @b , $elem;

[download]
but the compiler complains (complaier?):
Type of arg 1 to push must be array (not null operation) at ... 

push @{$cond>0 ? \@a : \@b}, $elem;

[download]
works as expected.

since my friend is serious enough, have i to think it works in other version of perl? (mine 5.8.4)
what exactly the compiler means with "null operation"?

PS: that's what i like of perl and perlmonks, trying to answer someone question i got a brand new one. :)
Oha

In reply to Using ternary operator as lvalue in push by oha

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