Re: Advanced Sorting - GRT - Guttman Rosler Transform

[eyepopslikeamosquito]

Your example code:

my @sorted=map  { substr($_,4) }
           sort
           map  { pack("LA*",tr/eE/eE/,$_) } @words;

is not quite correct; the "LA*" should be "NA*". The "L" signifies a native 32-bit unsigned integer yet to guarantee sorting correctness on all architectures you must specify "N", network (big-endian) order.

[demerphq]

Ah, good catch. On my architecture it would sort correctly, but not on all. This is one of the reasons this technique can be a bit tricky, but getting it right can have a nice pay off. Cheers.


---
demerphq

_{<Elian> And I do take a kind of perverse pleasure in having an OO assembly language...}