From: "Peña, Botp" <botp@...>
Date: 2007-10-31T11:06:22+09:00
Subject: Re: Array and ASCII Help needed...

From: MenTaLguY [mailto:mental@rydia.net] 
# On Wed, 31 Oct 2007 05:58:32 +0900, 7stud -- 
# > Martin DeMello wrote:
# >> a ||= b is a common ruby idiom for "set a to b only if it isn't
# >> already defined" -
# >> it expands to a = a || b.
# > Nope.  What do you think the following will output:
# > h = Hash.new('hi')
# > h['a'] = h['a'] || 10
# > puts h['a']
# > Now, how about the following?  The same output as above?
# > h['a'] ||= 10
# > puts h['a']
#
# Actually, yes.  They give the same results.  Try it yourself...

i think 7stud meant this,

~> h=Hash.new("hi")
=> {}

~> h
=> {}

~> h['a']=h['a'] || 10
=> "hi"

~> h
=> {"a"=>"hi"}

~> h['b'] ||= 10
=> "hi"

~> h
=> {"a"=>"hi"}


kind regards -botp