Array One-liners

[japhy]

Less than 80 characters each! Whoo-hoo!

# randomize, via Fisher-Yates
@array[-$i,$j] = @array[$j,-$i] while $j = rand(@array - $i), ++$i < @
+array;

# remove a chunk from the end and place at the beginning ("cutting")
splice @array, 0, 0, splice(@array, rand @array);

# weave an array, method 1 (ABCDEF => ADBECF)
splice @array, @array/2 - $_, 0, pop @array for 0 .. (@array/2)-1;

# weave an array, method 2 (ABCDEF => DAEBFC)
splice @array, @array/2 + $_, 0, shift @array for 0 .. (@array/2)-1;

[merlyn]

splice @array, 0, 0, splice(@array, rand @array);

Good stuff, but typically we spell that:

unshift @array, splice @array, rand @array;

splice is cool, but you don't need to use it for the common thingies.

-- Randal L. Schwartz, Perl hacker