From: Jason Roelofs <jameskilton@...>
Date: 2008-04-26T00:37:43+09:00
Subject: Re: Array inject function problem

On Fri, Apr 25, 2008 at 11:32 AM, Inbroker Adams <dadravu@yahoo.gr> wrote:
> Hello Rubyists,
>  I am new to the language and the community.
>  My first problem is this :
>
>  i used  the following code :
>
>  sum = 0
>  [1,3,5].inject() {|sum, element| sum + element}
>  print sum
>
>
>  I expected to get 9
>  but instead i get 4
>
>  I just installed the Ruby 1.8.6 one-click installer on windows
>  and wrote the above commands in SciTE.
>  Any suggestions??

You're confused with how variables work in Ruby

puts [1,3,5].inject() {|sum, element| sum + element}  # => 9

'sum' in the block is a different scope from your outside 'sum'

Jason