2008-05-14 17:48:37 +00:00
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# 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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2008-12-09 20:36:24 +00:00
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class OrderedHash < Hash #:nodoc:
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def initialize(*args, &block)
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super
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@keys = []
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2008-05-14 17:48:37 +00:00
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end
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2008-12-09 20:36:24 +00:00
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def []=(key, value)
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if !has_key?(key)
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@keys << key
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end
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super
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2008-05-14 17:48:37 +00:00
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end
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def delete(key)
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2008-12-09 20:36:24 +00:00
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array_index = has_key?(key) && index(key)
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if array_index
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@keys.delete_at(array_index)
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end
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super
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2008-05-14 17:48:37 +00:00
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end
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def keys
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2008-12-09 20:36:24 +00:00
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@keys
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2008-05-14 17:48:37 +00:00
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end
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def values
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2008-12-09 20:36:24 +00:00
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@keys.collect { |key| self[key] }
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2008-05-14 17:48:37 +00:00
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end
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def to_hash
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2008-12-09 20:36:24 +00:00
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Hash.new(self)
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2008-06-03 19:15:33 +00:00
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end
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2008-11-18 22:00:35 +00:00
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def each_key
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2008-12-09 20:36:24 +00:00
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@keys.each { |key| yield key }
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2008-11-18 22:00:35 +00:00
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end
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def each_value
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2008-12-09 20:36:24 +00:00
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@keys.each { |key| yield self[key]}
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end
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def each
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keys.each {|key| yield [key, self[key]]}
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2008-11-18 22:00:35 +00:00
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end
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2008-05-14 17:48:37 +00:00
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end
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end
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end
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