From: Thomas Wieczorek <wieczo.yo@...>
Date: 2008-08-20T21:22:04+09:00
Subject: Re: array of hashes - need to iterate and calulate stats but how

You can also create Structs in Ruby if you prefer them

Item = Struct.new(:title, :article_number)
it = Item.new("Wii", "Wii")
it.title #=>"Wii"

You can add as many members as you like in the Struct constructor.

As to go with your statistics, I agree with the others. I'd use a
statitiscs Hash and count the different items:

stats_hash = {  }
Stats = Struct.new(:count, :sold)
item_array.each { |it|
  unless hash[item[:article_number]]
    hash[item[:article_number]] = Stats.new(0, 0)
  end
  hash[item[:article_number]].count += 1
  hash[item[:article_number]].sold += 1 if item[:did_it_sell]
}