map { push ... } is a rather silly construct. Better solutions: 

my $counter = 0;
my @combined;
push @combined, "$_:$array2[$counter++]" for @array1;

[download]
my $counter = 0;
my @combined = map { "$_:$array2[$counter++]" } @array1;

[download]

Having two independent but equivalent iterators is overly complex. Better: 

my @combined = map { "$array1[$_]:$array2[$_]" } 0..$#array1;

[download]

In reply to Re^2: iterating 2 arrays in parallel by ikegami
in thread iterating 2 arrays in parallel by Anonymous Monk

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