You can accomplish whatever it is you are desiring by using array indices instead: 

my @problems = (1,2,3);
for my $i (0 .. $#problems) {
   push @problems, $problems[$i] if $problems[$i];
}

print for @problems;

[download]

Care to explain what it is you are trying to accomplish? :)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re: push in for loop by jeffa
in thread push in for loop by Sewi

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