From: Stefan Rusterholz <apeiros@...>
Date: 2007-08-20T04:15:48+09:00
Subject: Re: Float addition problem / Processor bug?

Christian Luginbuehl wrote:
> However I don't like this Float behaviour of Ruby. Especially that the
> String representation of such values looks correct, while testing for
> equality says 'false' - like this:

That's no "ruby" problem. You have to understand what floats are (and 
they are that way *everywhere*, not just ruby): approximations. Think of 
it this way: try to represent 1/3 (0.333...) in a decimal *precisely*. 
It doesn't work. Or try to represent pi in decimal *precisely*. Doesn't 
work either. The same way a float can never represent some numbers 
precisely.
Also see http://wiki.rubygarden.org/Ruby/page/show/RubyLangFAQ
Maybe do some research of your own on floats, e.g. read a bit about them 
on wikipedia.

Regards
Stefan
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