Re: natural sort on array of arrays

[salva]

useSort::Key::Natural qw(natkeysort);

my @sorted = natkeysort { $_->[0] } @matrix;

[duelafn]

Excellent! I love Sort::Key, but never noticed it has a natural sort included. Took me a moment to figure out what it was doing in its key maker though — it has a packing algorithm which allows it to sort numbers of arbitrary size (unlike most of the techniques in this thread).