From: Erwin <yves_dufour@...>
Date: 2008-09-08T17:34:01+09:00
Subject: Re: any way to write it in one line ?

On 7 sep, 10:37, Robert Klemme <shortcut...@googlemail.com> wrote:
> On 06.09.2008 20:17,Erwinwrote:
>
> >      works =  Array.new
> >      session[:cart_works].each_pair {|key, value| works << key if
> > value == user_id}
>
> > how to initialize the works array in the bloc ?
>
> You cannot do it inside the block because then it is not know after the
> block because of how the scoping works:
>
> $ ruby -e '[1].each { w = 10 }; p w'
> -e:1: undefined local variable or method `w' for main:Object (NameError)
>
> You can do
>
> works = session[:cart_works].inject [] do |w,(k,v)|
>    w << k if v == user_id
>    w
> end
>
> works = session[:cart_works].select {|k,v| v == user_id}.map {|k,v| k}
>
> Kind regards
>
>         robert

thanks Robert ! I have to look a little bit into the .select ...