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warolv/example.rb

Created November 3, 2013 16:29
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Rails’ index_by: the easy way to convert an Array to a Hash
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example.rb
Post.all.index_by { |post| post.id }
# => { 1 => #<Post ...>, 2 => #<Post ...>, ... }
Post.all.index_by(&:title)
# => { "My first post" => #<Post ...>, "My second post" => #<Post ...>, ... }
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