From: Eero Saynatkari <ruby-forum-reg@...>
Date: 2005-12-12T06:43:52+09:00
Subject: Re: creating a <=> method

Dirk Meijer wrote:
> hi everyone,
> i've created a class, and want it to be comparable with itself, but i 
> don't
> know what to place inside the <=> method.
> the basic idea is that one of the values of the class (which is a 
> symbol) is
> converted to a string, which is then compared.

# The spaceship operator needs to return either
# -1, 0 or 1 depending on whether it is 'smaller',
# 'equal' or 'greater' than the other object.
def <=>(other)
  # We can use String#<=> here if both are Strings.
  # Otherwise implement some custom comparison as above.
  @my_value.to_s <=> other.to_s
end


> greetings, Dirk.

E


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