From: Joel VanderWerf <vjoel@...>
Date: 2004-06-09T02:56:49+09:00
Subject: Re: How can I use the last returned value?

Dennis Ranke wrote:
> To get easier access to the last value, I put the following into my irb.rc:
> 
> def ans
>   IRB.CurrentContext.last_value
> end

Nice. I tried defining the same with the name _, but that fails because 
_ happens to be a local variable that's already defined in an irb 
session. Oh, well.

irb(main):001:0> defined?(_)
=> "local-variable"
irb(main):002:0> local_variables
=> ["_"]
irb(main):003:0> def _
irb(main):004:1>   IRB.CurrentContext.last_value
irb(main):005:1> end
=> nil
irb(main):006:0> 3+4
=> 7
irb(main):007:0> _
=> nil