diff options
Diffstat (limited to 'activesupport/lib/active_support/hash_with_indifferent_access.rb')
| -rw-r--r-- | activesupport/lib/active_support/hash_with_indifferent_access.rb | 117 |
1 files changed, 88 insertions, 29 deletions
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb index 03770a197c..2e2ed8a25d 100644 --- a/activesupport/lib/active_support/hash_with_indifferent_access.rb +++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb @@ -1,5 +1,7 @@ -require 'active_support/core_ext/hash/keys' -require 'active_support/core_ext/hash/reverse_merge' +# frozen_string_literal: true + +require "active_support/core_ext/hash/keys" +require "active_support/core_ext/hash/reverse_merge" module ActiveSupport # Implements a hash where keys <tt>:foo</tt> and <tt>"foo"</tt> are considered @@ -40,6 +42,12 @@ module ActiveSupport # rgb = { black: '#000000', white: '#FFFFFF' }.with_indifferent_access # # which may be handy. + # + # To access this class outside of Rails, require the core extension with: + # + # require "active_support/core_ext/hash/indifferent_access" + # + # which will, in turn, require this file. class HashWithIndifferentAccess < Hash # Returns +true+ so that <tt>Array#extract_options!</tt> finds members of # this class. @@ -68,25 +76,6 @@ module ActiveSupport end end - def default(*args) - arg_key = args.first - - if include?(key = convert_key(arg_key)) - self[key] - else - super - end - end - - def self.new_from_hash_copying_default(hash) - ActiveSupport::Deprecation.warn(<<-MSG.squish) - `ActiveSupport::HashWithIndifferentAccess.new_from_hash_copying_default` - has been deprecated, and will be removed in Rails 5.1. The behavior of - this method is now identical to the behavior of `.new`. - MSG - new(hash) - end - def self.[](*args) new.merge!(Hash[*args]) end @@ -161,7 +150,6 @@ module ActiveSupport alias_method :has_key?, :key? alias_method :member?, :key? - # Same as <tt>Hash#[]</tt> where the key passed as argument can be # either a string or a symbol: # @@ -189,6 +177,36 @@ module ActiveSupport super(convert_key(key), *extras) end + if Hash.new.respond_to?(:dig) + # Same as <tt>Hash#dig</tt> where the key passed as argument can be + # either a string or a symbol: + # + # counters = ActiveSupport::HashWithIndifferentAccess.new + # counters[:foo] = { bar: 1 } + # + # counters.dig('foo', 'bar') # => 1 + # counters.dig(:foo, :bar) # => 1 + # counters.dig(:zoo) # => nil + def dig(*args) + args[0] = convert_key(args[0]) if args.size > 0 + super(*args) + end + end + + # Same as <tt>Hash#default</tt> where the key passed as argument can be + # either a string or a symbol: + # + # hash = ActiveSupport::HashWithIndifferentAccess.new(1) + # hash.default # => 1 + # + # hash = ActiveSupport::HashWithIndifferentAccess.new { |hash, key| key } + # hash.default # => nil + # hash.default('foo') # => 'foo' + # hash.default(:foo) # => 'foo' + def default(*args) + super(*args.map { |arg| convert_key(arg) }) + end + # Returns an array of the values at the specified indices: # # hash = ActiveSupport::HashWithIndifferentAccess.new @@ -199,13 +217,26 @@ module ActiveSupport indices.collect { |key| self[convert_key(key)] } end + # Returns an array of the values at the specified indices, but also + # raises an exception when one of the keys can't be found. + # + # hash = ActiveSupport::HashWithIndifferentAccess.new + # hash[:a] = 'x' + # hash[:b] = 'y' + # hash.fetch_values('a', 'b') # => ["x", "y"] + # hash.fetch_values('a', 'c') { |key| 'z' } # => ["x", "z"] + # hash.fetch_values('a', 'c') # => KeyError: key not found: "c" + def fetch_values(*indices, &block) + indices.collect { |key| fetch(key, &block) } + end if Hash.method_defined?(:fetch_values) + # Returns a shallow copy of the hash. # # hash = ActiveSupport::HashWithIndifferentAccess.new({ a: { b: 'b' } }) # dup = hash.dup # dup[:a][:c] = 'c' # - # hash[:a][:c] # => nil + # hash[:a][:c] # => "c" # dup[:a][:c] # => "c" def dup self.class.new(self).tap do |new_hash| @@ -217,7 +248,7 @@ module ActiveSupport # modify the receiver but rather returns a new hash with indifferent # access with the result of the merge. def merge(hash, &block) - self.dup.update(hash, &block) + dup.update(hash, &block) end # Like +merge+ but the other way around: Merges the receiver into the @@ -229,11 +260,13 @@ module ActiveSupport def reverse_merge(other_hash) super(self.class.new(other_hash)) end + alias_method :with_defaults, :reverse_merge # Same semantics as +reverse_merge+ but modifies the receiver in-place. def reverse_merge!(other_hash) - replace(reverse_merge( other_hash )) + super(self.class.new(other_hash)) end + alias_method :with_defaults!, :reverse_merge! # Replaces the contents of this hash with other_hash. # @@ -268,6 +301,30 @@ module ActiveSupport dup.tap { |hash| hash.reject!(*args, &block) } end + def transform_values(*args, &block) + return to_enum(:transform_values) unless block_given? + dup.tap { |hash| hash.transform_values!(*args, &block) } + end + + def transform_keys(*args, &block) + return to_enum(:transform_keys) unless block_given? + dup.tap { |hash| hash.transform_keys!(*args, &block) } + end + + def slice(*keys) + keys.map! { |key| convert_key(key) } + self.class.new(super) + end + + def slice!(*keys) + keys.map! { |key| convert_key(key) } + super + end + + def compact + dup.tap(&:compact!) + end + # Convert to a regular hash with string keys. def to_hash _new_hash = Hash.new @@ -279,12 +336,12 @@ module ActiveSupport _new_hash end - protected - def convert_key(key) + private + def convert_key(key) # :doc: key.kind_of?(Symbol) ? key.to_s : key end - def convert_value(value, options = {}) + def convert_value(value, options = {}) # :doc: if value.is_a? Hash if options[:for] == :to_hash value.to_hash @@ -301,7 +358,7 @@ module ActiveSupport end end - def set_defaults(target) + def set_defaults(target) # :doc: if default_proc target.default_proc = default_proc.dup else @@ -311,4 +368,6 @@ module ActiveSupport end end +# :stopdoc: + HashWithIndifferentAccess = ActiveSupport::HashWithIndifferentAccess |