class OrderedHash

Ruby on Rails 3.2.22.5

Since v2.2.3 Last seen in v6.1.7.10

Available in: v2.2.3 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10

Compare with:

The order of iteration over hashes in Ruby 1.8 is undefined. For example, you do not know the order in which keys will return keys, or each yield pairs. ActiveSupport::OrderedHash implements a hash that preserves insertion order, as in Ruby 1.9:

oh = ActiveSupport::OrderedHash.new
oh[:a] = 1
oh[:b] = 2
oh.keys # => [:a, :b], this order is guaranteed

ActiveSupport::OrderedHash is namespaced to prevent conflicts with other implementations.

Inherits from

Hash

Methods (defined here)

# []=
# clear
# delete
# delete_if
# each
# each_key
# each_pair
# each_value
# encode_with
# extractable_options?
# initialize_copy
# inspect
# invert
# keys
# merge
# merge!
# nested_under_indifferent_access
# reject
# reject!
# replace
# shift
# sync_keys!
# to_a
# to_hash
# to_yaml
# to_yaml_type
# values
self. []
self. new

Used by

Subclasses (1)

ActiveSupport::OrderedOptions

Methods (inherited)

From Hash (28)

# assert_valid_keys
# deep_dup
# deep_merge
# deep_merge!
# diff
# encode_json
# except
# except!
# extract!
# extractable_options?
# nested_under_indifferent_access
# reverse_merge
# reverse_merge!
# reverse_update
# slice
# slice!
# stringify_keys
# stringify_keys!
# symbolize_keys
# symbolize_keys!
# to_options
# to_options!
# to_param
# to_query
# to_xml
# with_indifferent_access
self. from_trusted_xml
self. from_xml

From Object (18)

# acts_like?
# blank?
# create_fixtures
# duplicable?
# html_safe?
# in?
# instance_variable_names
# options
# presence
# present?
# test_homepage
# to_json
# to_param
# to_query
# try
# unescape
# with_options
self. table_name_prefix