You want to move certain array elements to the end? I'd do it like this:
my @front, @back;
while( @array1 ) {
if( exists $skip{$_->[0]} ) {
push @back, $_;
else {
push @front, $_;
}
}
my @array2 = (@front, @back);
The while loop could also be written as
push @{exists $skip{$_->[0]} ? \@back : \@front}, $_;
... and from there you could always carry on as far as
push @{exists $skip{$_->[0]} ? \@back : \@front}, $_ for @array;
... and do away with the while but that requires a much more advanced understanding of Perl and I'm not sure that it's any clearer. And of course it becomes a real pain to step through it in the debugger... And of course I may have completely misunderstood what you're trying to do :)
print@_{sort keys %_},$/if%_=split//,'= & *a?b:e\f/h^h!j+n,o@o;r$s-t%t#u'
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