From: Leslie Viljoen <leslieviljoen@...>
Date: 2008-02-20T07:11:31+09:00
Subject: ||= [] idiom

I often make use of this idiom to add something to an array in a hash of arrays:

@categories = {}

pagelist.each do |resource|
    @categories[resource.tag] ||= []
    @categories[resource.tag] << resource
end


.. is there a better way? Can the two @categories lines
be made into one?


Les