Using a slice in the delete call will sidestep the for-loop. The map can also be replaced with a slice.

    hash_slice => sub {
        my %ha; @ha{0..$#numbers} = @numbers;
        delete @ha{@indices};
        my @output = @ha{sort keys %ha};
        join("\0", @output) eq join("\0", @expect) or die if TEST;
    },

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In reply to Re^2: Fastest way to "pick without replacement" by swl
in thread Fastest way to "pick without replacement" by haukex

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