From: ts <decoux@...>
Date: 2001-06-23T00:00:05+09:00
Subject: [ruby-talk:16770] Re: uniq and "equivalence"

>>>>> "H" == Hugh Sasse Staff Elec Eng <hgs@dmu.ac.uk> writes:

>> Array#uniq make first an hash, then delete the elements.

H> is that Object#hash() or Hash.new()?  

  Hash::new

H>    Object#hash must return a fixnum such that
H>    a.eql?(b) means a.hash = b.hash.  That is a pretty tall
H>    order for arrays of floats.  Has anyone any suggestions
H>    on how to proceed?

 Define a #hash method for your class Trapezoidal_fitness, actually because
 it's not defined it use the default #hash function which is the id of the
 object.


Guy Decoux