From: Brian Candler <b.candler@...>
Date: 2010-10-04T18:20:36+09:00
Subject: Re: How to suppress display of specific code in irb??

Don Norcott wrote:
> require 'hpricot'
> url = "http://www....."
> doc = Hpricot.XML(open(url))
> 
> In interactive ruby can I suppress the output produced by
>    Hpricot.XML(open(url))
> 
> is this the stdout stream or is it something else?

In Ruby, every expression has a value, and by default irb displays that 
value (more precisely, it shows value.inspect)

For example:

>> 1+2
=> 3
>> puts 1+2
3
=> nil
>> 

In the second example, "3" is puts producing output, and the return 
value from puts is nil.
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