From: Tom Allison <tallison@...>
Date: 2006-01-16T23:50:05+09:00
Subject: Re: basic question about Fixnum & Integer

Jules wrote:
> No, you don't have to require integer, because it is in the core. The 
> core is always available. You can read the docs here:
> 
> http://www.ruby-doc.org/core/
> 
> And there is a standard library too:
> 
> http://www.ruby-doc.org/stdlib/
> 
> Most of these are not available by default. If you want to use a YAML 
> parser, you have to require YAML.
> 

Thanks for the references.

For some reason I can't get my installation of Ruby to do what the 
examples show:

6.lcm 7

return

 >> 6.lcm 7
NoMethodError: undefined method `lcm' for 6:Fixnum
         from (irb):17
         from :0
 >> 6.lcm(7)
NoMethodError: undefined method `lcm' for 6:Fixnum
         from (irb):18
         from :0


This is too simple to get wrong?