44 lines
914 B
Ruby
44 lines
914 B
Ruby
# OrderedHash is namespaced to prevent conflicts with other implementations
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module ActiveSupport
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# Hash is ordered in Ruby 1.9!
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if RUBY_VERSION >= '1.9'
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OrderedHash = ::Hash
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else
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class OrderedHash < Array #:nodoc:
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def []=(key, value)
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if pair = assoc(key)
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pair.pop
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pair << value
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else
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self << [key, value]
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end
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end
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def [](key)
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pair = assoc(key)
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pair ? pair.last : nil
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end
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def delete(key)
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pair = assoc(key)
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pair ? array_index = index(pair) : nil
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array_index ? delete_at(array_index).last : nil
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end
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def keys
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collect { |key, value| key }
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end
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def values
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collect { |key, value| value }
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end
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def to_hash
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returning({}) do |hash|
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each { |array| hash[array[0]] = array[1] }
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end
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end
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end
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end
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end
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