From: Jeff Mitchell <quixoticsycophant@...>
Date: 2004-06-06T22:03:17+09:00
Subject: Re: When arg is a variable,  can the variable's name be displayed?


--- Richard Lionheart <NoOne@Nowhere.com> wrote:
> Hi,
> 
> For debugging purposes,  I'd like to write a routine to dump a variables
> name and value, sort of like Object#inspect but different.  I'd like to
> write:
> 

I put the following on http://www.rubygarden.org/ruby?OneLiners

def show(&block)
   printf("%-25s>>  %s\n", expr = block.call, eval(expr, block.binding).inspect)
end

Example:

show {%{ a = [1,2,3] }} ;
show {%{ a.slice(1,2) }} ;
show {%{ a.map { |x| x**3 } }}

produces:

 a = [1,2,3]             >>  [1, 2, 3]
 a.slice(1,2)            >>  [2, 3]
 a.map { |x| x**3 }      >>  [1, 8, 27]





	
		
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