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体验新版 GitCode,发现更多精彩内容 >>
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b1dfcc96
编写于
5月 16, 2012
作者:
F
Francesco Rodriguez
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update AS:OrderedHash docs
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3004bc24
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activesupport/lib/active_support/ordered_hash.rb
activesupport/lib/active_support/ordered_hash.rb
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activesupport/lib/active_support/ordered_hash.rb
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@@ -5,16 +5,20 @@
...
@@ -5,16 +5,20 @@
end
end
module
ActiveSupport
module
ActiveSupport
# The order of iteration over hashes in Ruby 1.8 is undefined. For example, you do not know the
# <tt>ActiveSupport::OrderedHash</tt> implements a hash that preserves
# order in which +keys+ will return keys, or +each+ yield pairs. <tt>ActiveSupport::OrderedHash</tt>
# insertion order.
# implements a hash that preserves insertion order, as in Ruby 1.9:
#
#
# oh = ActiveSupport::OrderedHash.new
# oh = ActiveSupport::OrderedHash.new
# oh[:a] = 1
# oh[:a] = 1
# oh[:b] = 2
# oh[:b] = 2
# oh.keys # => [:a, :b], this order is guaranteed
# oh.keys # => [:a, :b], this order is guaranteed
#
#
# <tt>ActiveSupport::OrderedHash</tt> is namespaced to prevent conflicts with other implementations.
# Also, maps the +omap+ feature for YAML files
# (See http://yaml.org/type/omap.html) to support ordered items
# when loading from yaml.
#
# <tt>ActiveSupport::OrderedHash</tt> is namespaced to prevent conflicts
# with other implementations.
class
OrderedHash
<
::
Hash
class
OrderedHash
<
::
Hash
def
to_yaml_type
def
to_yaml_type
"!tag:yaml.org,2002:omap"
"!tag:yaml.org,2002:omap"
...
...
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