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rails--rails/activesupport/lib/active_support/ordered_options.rb
Jeremy Kemper fba05826dc Hash is ordered in Ruby 1.9
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7817 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
2007-10-09 07:48:59 +00:00

49 lines
929 B
Ruby

# OrderedHash is namespaced to prevent conflicts with other implementations
module ActiveSupport
# Hash is ordered in Ruby 1.9!
if RUBY_VERSION >= '1.9'
OrderedHash = ::Hash
else
class OrderedHash < Array #:nodoc:
def []=(key, value)
if pair = assoc(key)
pair.pop
pair << value
else
self << [key, value]
end
end
def [](key)
pair = assoc(key)
pair ? pair.last : nil
end
def keys
collect { |key, value| key }
end
def values
collect { |key, value| value }
end
end
end
end
class OrderedOptions < ActiveSupport::OrderedHash #:nodoc:
def []=(key, value)
super(key.to_sym, value)
end
def [](key)
super(key.to_sym)
end
def method_missing(name, *args)
if name.to_s =~ /(.*)=$/
self[$1.to_sym] = args.first
else
self[name]
end
end
end