From: Allen Walker <auswalk@...>
Date: 2008-09-11T09:57:18+09:00
Subject: Getting values from array of arrays

I have a drop down list in my view. In my model I have the following:

ARTICLE_CATEGORIES = [
                        ["News", 1], ["Article", 2], ["Review", 3]
                       ]

validates_inclusion_of :category, :in => ARTICLE_CATEGORIES.map { |disp,
value| value }

I want to extract out all "Article" types in my controller.

So in my controller: (I have a 'category' field in my 'articles' table)

@news = Article.find_by_category(ARTICLE::ARTICLE_CATEGORIES.find...??)

Not sure how to do this. I want to get the ID (in this case 2) from the
ARTICLES_CATEGORIES array but I want to extract it out of this array
using the key "Article".

Thanks
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