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  1. or download this
    push @foo, [ split /:/ ] while <>;
    print map { "$_->[0]\n" } sort { $a->[2] <=> $b->[2] } @foo;
    # Two lines, for clarity.
    # Of course I could have used another map.
    
  2. or download this
    2;0 juerd@ouranos:~$ perl -e'undef christmas'
    Segmentation fault
    2;139 juerd@ouranos:~$