From: Florian Gilcher <flo@...>
Date: 2012-03-30T00:20:20+09:00
Subject: Re: Way to identify ambiguity between local-var name and class method name


On Mar 29, 2012, at 9:22 AM, Nikolay M. wrote:

> Also, I can't find ruby warning, when local variable was created, but
> not used. It seems good solution - easy to implement, warnings makes
> this bugs more "catchable", total ruby behavior does not changed,
> programmers have additional validation tool.

Ruby 1.9.3 warns for unused variables if you use `ruby -w`.

    vagrant@ubuntu-10:~$ cat test.rb 
    def foo
      a = 10
    end

    foo
    vagrant@ubuntu-10:~$ ruby -vw test.rb
    ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-linux]
    test.rb:2: warning: assigned but unused variable - a

Ruby < 1.9.3 does not.

Regards,
Florian