I wasn't aware of for ( reverse N .. M ) being optimized in *any* case. Because of that, I'd normally write that without the reverse() and use the number as an offset from the end. In the loop, treating the offset as a negative number works to get the "from the end" effect. This buys the iterator space savings of for(N..M) back.

for my $offset ( 0 .. $#ary_a ) {
    foobar( $ary_a[ -$offset ], $ary_b[ -$offset ] );
}

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In reply to Re^2: Looping backwards through two arrays at once? by diotalevi
in thread Looping backwards through two arrays at once? by Spidy

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