From: Joel VanderWerf <vjoel@...>
Date: 2004-06-12T15:48:33+09:00
Subject: Re: Any way to get the calling method's binding?

Austin McDonald wrote:
> In the meantime, you could do this:
> 
> def trace (expr)
>    LOG.debug "#{expr} = #{yield expr}"
> end
> 
> def something
>    x=5
>    x=7
>    trace "x+y", {|n| eval n}
> end
> 
> something => 12

def trace(&block)
   expr = block.call
   puts "#{expr} = #{eval(expr, block)}"
end

def something
   x = 5
   y = 7
   trace {"x + y"}
end

something   # ==> x + y = 12