From: Robert Klemme <shortcutter@...>
Date: 2009-06-13T18:50:05+09:00
Subject: Re: Noob question, regarding array

On 13.06.2009 11:36, Thiago wrote:
> Im on chapter, Implementing a SongList Container, doing the code
> samples, but i'm getting the following error when trying to run the
> code:
> 18:in `append': undefined method `push' for nil:NilClass
> (NoMethodError)
> 	from F:/InstantRails/rails_apps/test/test2.rb:80
> 
> I have a SongList class with the following method:
> 
> 	def append(aSong)
> 		@songs.push(aSong)
> 		self
> 	end
> 
> and im trying to run the code sample as in the book:
> 
> list = SongList.new
> list.
>   append(Song.new('title1', 'artist1', 1)).
>   append(Song.new('title2', 'artist2', 2)).
>   append(Song.new('title3', 'artist3', 3)).
>   append(Song.new('title4', 'artist4', 4))
> 
> This doesnt make any sense. I can create the Song object just fine,
> but if i try to add it to the array i get this erro.
> Can anyone help me please?

You did not show all the code but my guess would be that you did not 
initialize @songs properly in #initialize.

Kind regards

	robert

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