Class: ActiveSupport::HashWithIndifferentAccess

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses: ActionCable::Connection::TestCookieJar, ActionCable::Connection::TestCookies
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, `::Hash`
Instance Chain: self, `::Hash`
Inherits:	Hash `::Object` Hash ActiveSupport::HashWithIndifferentAccess
Defined in:	activesupport/lib/active_support/hash_with_indifferent_access.rb

Overview

Hash With Indifferent Access

Implements a hash where keys :foo and "foo" are considered to be the same.

rgb = ActiveSupport::HashWithIndifferentAccess.new

rgb[:black] = '#000000'
rgb[:black]  # => '#000000'
rgb['black'] # => '#000000'

rgb['white'] = '#FFFFFF'
rgb[:white]  # => '#FFFFFF'
rgb['white'] # => '#FFFFFF'

Internally symbols are mapped to strings when used as keys in the entire writing interface (calling #[]=, #merge, etc). This mapping belongs to the public interface. For example, given:

hash = ActiveSupport::HashWithIndifferentAccess.new(a: 1)

You are guaranteed that the key is returned as a string:

hash.keys # => ["a"]

Technically other types of keys are accepted:

hash = ActiveSupport::HashWithIndifferentAccess.new(a: 1)
hash[0] = 0
hash # => {"a"=>1, 0=>0}

but this class is intended for use cases where strings or symbols are the expected keys and it is convenient to understand both as the same. For example the params hash in Ruby on Rails.

Note that core extensions define Hash#with_indifferent_access:

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 Method Summary

.[](*args)
.new(constructor = nil) ⇒ HashWithIndifferentAccess constructor

`::Hash` - Inherited

.from_trusted_xml	Builds a `::Hash` from XML just like Hash.from_xml, but also allows `::Symbol` and YAML.
.from_xml	Returns a `::Hash` containing a collection of pairs when the key is the node name and the value is its content.

Instance Attribute Summary

#extractable_options? ⇒ Boolean readonly

Returns true so that Array#extract_options! finds members of this class.

`::Hash` - Inherited

#extractable_options?

By default, only instances of ::Hash itself are extractable.

Instance Method Summary

#[](key)

Same as Hash#[] where the key passed as argument can be either a string or a symbol:
#[]=(key, value) (also: #store)

Assigns a new value to the hash:
#assoc(key)

Same as Hash#assoc where the key passed as argument can be either a string or a symbol:
#compact
#deep_symbolize_keys
#default(key = (no_key = true))

Same as Hash#default where the key passed as argument can be either a string or a symbol:
#delete(key)

Removes the specified key from the hash.
#dig(*args)

Same as Hash#dig where the key passed as argument can be either a string or a symbol:
#dup

Returns a shallow copy of the hash.
#except(*keys) (also: #without)

Returns a hash with indifferent access that includes everything except given keys.
#fetch(key, *extras)

Same as Hash#fetch where the key passed as argument can be either a string or a symbol:
#fetch_values(*indices, &block)

Returns an array of the values at the specified indices, but also raises an exception when one of the keys can’t be found.
#has_key?(key)

Alias for #key?.
#include?(key)

Alias for #key?.
#key?(key) ⇒ Boolean (also: #include?, #has_key?, #member?)

Checks the hash for a key matching the argument passed in:
#member?(key)

Alias for #key?.
#merge(*hashes, &block)

This method has the same semantics of #update, except it does not modify the receiver but rather returns a new hash with indifferent access with the result of the merge.
#merge!(*other_hashes, &block)

Alias for #update.
#nested_under_indifferent_access
#regular_update
#regular_writer
#reject(*args, &block)
#replace(other_hash)

Replaces the contents of this hash with other_hash.
#reverse_merge(other_hash) (also: #with_defaults)

Like #merge but the other way around: Merges the receiver into the argument and returns a new hash with indifferent access as result:
#reverse_merge!(other_hash) (also: #with_defaults!)

Same semantics as #reverse_merge but modifies the receiver in-place.
#select(*args, &block)
#slice(*keys)
#slice!(*keys)
#store(key, value)

Alias for #[]=.
#symbolize_keys (also: #to_options)
#to_hash

Convert to a regular hash with string keys.
#to_options

Alias for #symbolize_keys.
#to_options!
#to_proc
#transform_keys(hash = NOT_GIVEN, &block)
#transform_keys!(hash = NOT_GIVEN, &block)
#transform_values(&block)
#update(*other_hashes, &block) (also: #merge!)

Updates the receiver in-place, merging in the hashes passed as arguments:
#values_at(*keys)

Returns an array of the values at the specified indices:
#with_defaults(other_hash)

Alias for #reverse_merge.
#with_defaults!(other_hash)

Alias for #reverse_merge!.
#with_indifferent_access
#without(*keys)

Alias for #except.

`::Hash` - Inherited

#assert_valid_keys	Validates all keys in a hash match `*valid_keys`, raising `ArgumentError` on a mismatch.
#blank?	A hash is blank if it’s empty:
#compact_blank!	Removes all blank values from the `::Hash` in place and returns self.
#deep_dup	Returns a deep copy of hash.
#deep_merge	Returns a new hash with `self` and `other_hash` merged recursively.
#deep_merge!	Same as `#deep_merge`, but modifies `self`.
#deep_stringify_keys	Returns a new hash with all keys converted to strings.
#deep_stringify_keys!	Destructively converts all keys to strings.
#deep_symbolize_keys	Returns a new hash with all keys converted to symbols, as long as they respond to `to_sym`.
#deep_symbolize_keys!	Destructively converts all keys to symbols, as long as they respond to `to_sym`.
#deep_transform_keys	Returns a new hash with all keys converted by the block operation.
#deep_transform_keys!	Destructively converts all keys by using the block operation.
#deep_transform_values	Returns a new hash with all values converted by the block operation.
#deep_transform_values!	Destructively converts all values by using the block operation.
#except!	Removes the given keys from hash and returns it.
#extract!	Removes and returns the key/value pairs matching the given keys.
#nested_under_indifferent_access	Alias for Hash#with_indifferent_access.
#reverse_merge	Merges the caller into `other_hash`.
#reverse_merge!	Destructive #reverse_merge.
#reverse_update	Alias for Hash#reverse_merge!.
#slice!	Replaces the hash with only the given keys.
#stringify_keys	Returns a new hash with all keys converted to strings.
#stringify_keys!	Destructively converts all keys to strings.
#symbolize_keys	Returns a new hash with all keys converted to symbols, as long as they respond to `to_sym`.
#symbolize_keys!	Destructively converts all keys to symbols, as long as they respond to `to_sym`.
#to_options	Alias for Hash#symbolize_keys.
#to_options!	Alias for Hash#symbolize_keys!.
#to_param	Alias for Hash#to_query.
#to_query	Returns a string representation of the receiver suitable for use as a URL query string:
#to_xml	Returns a string containing an XML representation of its receiver:
#with_defaults	Alias for Hash#reverse_merge.
#with_defaults!	Alias for Hash#reverse_merge!.
#with_indifferent_access	Returns an `HashWithIndifferentAccess` out of its receiver:

Constructor Details

.new(constructor = nil) ⇒ `HashWithIndifferentAccess`

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 70


def initialize(constructor = nil)
  if constructor.respond_to?(:to_hash)
    super()
    update(constructor)

    hash = constructor.is_a?(Hash) ? constructor : constructor.to_hash
    self.default = hash.default if hash.default
    self.default_proc = hash.default_proc if hash.default_proc
  elsif constructor.nil?
    super()
  else
    super(constructor)
  end
end

Class Method Details

.[](*args)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 85


def self.[](*args)
  new.merge!(Hash[*args])
end

Instance Attribute Details

#extractable_options? ⇒ `Boolean` (readonly)

Returns true so that Array#extract_options! finds members of this class.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 58


def extractable_options?
  true
end

Instance Method Details

#[](key)

Same as Hash#[] where the key passed as argument can be either a string or a symbol:

counters = ActiveSupport::HashWithIndifferentAccess.new
counters[:foo] = 1

counters['foo'] # => 1
counters[:foo]  # => 1
counters[:zoo]  # => nil

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 168


def [](key)
  super(convert_key(key))
end

#[]=(key, value) Also known as: #store

Assigns a new value to the hash:

hash = ActiveSupport::HashWithIndifferentAccess.new
hash[:key] = 'value'

This value can be later fetched using either :key or 'key'.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 98


def []=(key, value)
  regular_writer(convert_key(key), convert_value(value, conversion: :assignment))
end

#assoc(key)

Same as Hash#assoc where the key passed as argument can be either a string or a symbol:

counters = ActiveSupport::HashWithIndifferentAccess.new
counters[:foo] = 1

counters.assoc('foo') # => ["foo", 1]
counters.assoc(:foo)  # => ["foo", 1]
counters.assoc(:zoo)  # => nil

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 181


def assoc(key)
  super(convert_key(key))
end

#compact

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 371


def compact
  dup.tap(&:compact!)
end

#deep_symbolize_keys

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 320


def deep_symbolize_keys; to_hash.deep_symbolize_keys! end

#default(key = (no_key = true))

Same as Hash#default 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'

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 223


def default(key = (no_key = true))
  if no_key
    super()
  else
    super(convert_key(key))
  end
end

#delete(key)

Removes the specified key from the hash.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 303


def delete(key)
  super(convert_key(key))
end

#dig(*args)

Same as Hash#dig 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

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 208


def dig(*args)
  args[0] = convert_key(args[0]) if args.size > 0
  super(*args)
end

#dup

Returns a shallow copy of the hash.

hash = ActiveSupport::HashWithIndifferentAccess.new({ a: { b: 'b' } })
dup  = hash.dup
dup[:a][:c] = 'c'

hash[:a][:c] # => "c"
dup[:a][:c]  # => "c"

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 264


def dup
  self.class.new(self).tap do |new_hash|
    set_defaults(new_hash)
  end
end

#except(*keys) Also known as: #without

Returns a hash with indifferent access that includes everything except given keys.

hash = { a: "x", b: "y", c: 10 }.with_indifferent_access
hash.except(:a, "b") # => {c: 10}.with_indifferent_access
hash                 # => { a: "x", b: "y", c: 10 }.with_indifferent_access

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 311


def except(*keys)
  dup.except!(*keys)
end

#fetch(key, *extras)

Same as Hash#fetch where the key passed as argument can be either a string or a symbol:

counters = ActiveSupport::HashWithIndifferentAccess.new
counters[:foo] = 1

counters.fetch('foo')          # => 1
counters.fetch(:bar, 0)        # => 0
counters.fetch(:bar) { |key| 0 } # => 0
counters.fetch(:zoo)           # => KeyError: key not found: "zoo"

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 195


def fetch(key, *extras)
  super(convert_key(key), *extras)
end

#fetch_values(*indices, &block)

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"

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 251


def fetch_values(*indices, &block)
  indices.map! { |key| convert_key(key) }
  super
end

#has_key?(key)

Alias for #key?.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 156


alias_method :has_key?, :key?

#include?(key)

Alias for #key?.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 155


alias_method :include?, :key?

#key?(key) ⇒ `Boolean` Also known as: #include?, #has_key?, #member?

Checks the hash for a key matching the argument passed in:

hash = ActiveSupport::HashWithIndifferentAccess.new
hash['key'] = 'value'
hash.key?(:key)  # => true
hash.key?('key') # => true

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 151


def key?(key)
  super(convert_key(key))
end

#member?(key)

Alias for #key?.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 157


alias_method :member?, :key?

#merge(*hashes, &block)

This method has the same semantics of #update, except it does not modify the receiver but rather returns a new hash with indifferent access with the result of the merge.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 273


def merge(*hashes, &block)
  dup.update(*hashes, &block)
end

#merge!(*other_hashes, &block)

Alias for #update.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 143


alias_method :merge!, :update

#nested_under_indifferent_access

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 66


def nested_under_indifferent_access
  self
end

#regular_update

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 90


alias_method :regular_update, :update unless method_defined?(:regular_update)

#regular_writer

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 89


alias_method :regular_writer, :[]= unless method_defined?(:regular_writer)

#reject(*args, &block)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 328


def reject(*args, &block)
  return to_enum(:reject) unless block_given?
  dup.tap { |hash| hash.reject!(*args, &block) }
end

#replace(other_hash)

Replaces the contents of this hash with other_hash.

h = { "a" => 100, "b" => 200 }
h.replace({ "c" => 300, "d" => 400 }) # => {"c"=>300, "d"=>400}

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 298


def replace(other_hash)
  super(self.class.new(other_hash))
end

#reverse_merge(other_hash) Also known as: #with_defaults

Like #merge but the other way around: Merges the receiver into the argument and returns a new hash with indifferent access as result:

hash = ActiveSupport::HashWithIndifferentAccess.new
hash['a'] = nil
hash.reverse_merge(a: 0, b: 1) # => {"a"=>nil, "b"=>1}

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 283


def reverse_merge(other_hash)
  super(self.class.new(other_hash))
end

#reverse_merge!(other_hash) Also known as: #with_defaults!

Same semantics as #reverse_merge but modifies the receiver in-place.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 289


def reverse_merge!(other_hash)
  super(self.class.new(other_hash))
end

#select(*args, &block)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 323


def select(*args, &block)
  return to_enum(:select) unless block_given?
  dup.tap { |hash| hash.select!(*args, &block) }
end

#slice(*keys)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 361


def slice(*keys)
  keys.map! { |key| convert_key(key) }
  self.class.new(super)
end

#slice!(*keys)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 366


def slice!(*keys)
  keys.map! { |key| convert_key(key) }
  super
end

#store(key, value)

Alias for #[]=.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 102


alias_method :store, :[]=

#symbolize_keys Also known as: #to_options

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 318


def symbolize_keys; to_hash.symbolize_keys! end

#to_hash

Convert to a regular hash with string keys.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 376


def to_hash
  copy = Hash[self]
  copy.transform_values! { |v| convert_value_to_hash(v) }
  set_defaults(copy)
  copy
end

#to_options

Alias for #symbolize_keys.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 319


alias_method :to_options, :symbolize_keys

#to_options!

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 321


def to_options!; self end

#to_proc

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 383


def to_proc
  proc { |key| self[key] }
end

#transform_keys(hash = NOT_GIVEN, &block)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 340


def transform_keys(hash = NOT_GIVEN, &block)
  return to_enum(:transform_keys) if NOT_GIVEN.equal?(hash) && !block_given?
  dup.tap { |h| h.transform_keys!(hash, &block) }
end

#transform_keys!(hash = NOT_GIVEN, &block)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 345


def transform_keys!(hash = NOT_GIVEN, &block)
  return to_enum(:transform_keys!) if NOT_GIVEN.equal?(hash) && !block_given?

  if hash.nil?
    super
  elsif NOT_GIVEN.equal?(hash)
    keys.each { |key| self[yield(key)] = delete(key) }
  elsif block_given?
    keys.each { |key| self[hash[key] || yield(key)] = delete(key) }
  else
    keys.each { |key| self[hash[key] || key] = delete(key) }
  end

  self
end

#transform_values(&block)

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 333


def transform_values(&block)
  return to_enum(:transform_values) unless block_given?
  dup.tap { |hash| hash.transform_values!(&block) }
end

#update(*other_hashes, &block) Also known as: #merge!

Updates the receiver in-place, merging in the hashes passed as arguments:

hash_1 = ActiveSupport::HashWithIndifferentAccess.new
hash_1[:key] = 'value'

hash_2 = ActiveSupport::HashWithIndifferentAccess.new
hash_2[:key] = 'New Value!'

hash_1.update(hash_2) # => {"key"=>"New Value!"}

hash = ActiveSupport::HashWithIndifferentAccess.new
hash.update({ "a" => 1 }, { "b" => 2 }) # => { "a" => 1, "b" => 2 }

The arguments can be either an HashWithIndifferentAccess or a regular ::Hash. In either case the merge respects the semantics of indifferent access.

If the argument is a regular hash with keys :key and "key" only one of the values end up in the receiver, but which one is unspecified.

When given a block, the value for duplicated keys will be determined by the result of invoking the block with the duplicated key, the value in the receiver, and the value in other_hash. The rules for duplicated keys follow the semantics of indifferent access:

hash_1[:key] = 10
hash_2['key'] = 12
hash_1.update(hash_2) { |key, old, new| old + new } # => {"key"=>22}

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 132


def update(*other_hashes, &block)
  if other_hashes.size == 1
    update_with_single_argument(other_hashes.first, block)
  else
    other_hashes.each do |other_hash|
      update_with_single_argument(other_hash, block)
    end
  end
  self
end

#values_at(*keys)

Returns an array of the values at the specified indices:

hash = ActiveSupport::HashWithIndifferentAccess.new
hash[:a] = 'x'
hash[:b] = 'y'
hash.values_at('a', 'b') # => ["x", "y"]

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 237


def values_at(*keys)
  keys.map! { |key| convert_key(key) }
  super
end

#with_defaults(other_hash)

Alias for #reverse_merge.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 286


alias_method :with_defaults, :reverse_merge

#with_defaults!(other_hash)

Alias for #reverse_merge!.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 292


alias_method :with_defaults!, :reverse_merge!

#with_indifferent_access

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 62


def with_indifferent_access
  dup
end

#without(*keys)

Alias for #except.

[ GitHub ]

# File 'activesupport/lib/active_support/hash_with_indifferent_access.rb', line 314


alias_method :without, :except

Class: ActiveSupport::HashWithIndifferentAccess

Overview

Hash With Indifferent Access

Class Method Summary

::Hash - Inherited

Instance Attribute Summary

::Hash - Inherited

Instance Method Summary

::Hash - Inherited

Constructor Details

.new(constructor = nil) ⇒ HashWithIndifferentAccess

Class Method Details

.[](*args)

Instance Attribute Details

#extractable_options? ⇒ Boolean (readonly)

Instance Method Details

#[](key)

#[]=(key, value) Also known as: #store

#assoc(key)

#compact

#deep_symbolize_keys

#default(key = (no_key = true))

#delete(key)

#dig(*args)

#dup

#except(*keys) Also known as: #without

#fetch(key, *extras)

#fetch_values(*indices, &block)

#has_key?(key)

#include?(key)

#key?(key) ⇒ Boolean Also known as: #include?, #has_key?, #member?

#member?(key)

#merge(*hashes, &block)

#merge!(*other_hashes, &block)

#nested_under_indifferent_access

#regular_update

#regular_writer

#reject(*args, &block)

#replace(other_hash)

#reverse_merge(other_hash) Also known as: #with_defaults

#reverse_merge!(other_hash) Also known as: #with_defaults!

#select(*args, &block)

#slice(*keys)

#slice!(*keys)

#store(key, value)

#symbolize_keys Also known as: #to_options

#to_hash

#to_options

#to_options!

#to_proc

#transform_keys(hash = NOT_GIVEN, &block)

#transform_keys!(hash = NOT_GIVEN, &block)

#transform_values(&block)

#update(*other_hashes, &block) Also known as: #merge!

#values_at(*keys)

#with_defaults(other_hash)

#with_defaults!(other_hash)

#with_indifferent_access

#without(*keys)

`::Hash` - Inherited

`::Hash` - Inherited

`::Hash` - Inherited

.new(constructor = nil) ⇒ `HashWithIndifferentAccess`

#extractable_options? ⇒ `Boolean` (readonly)

#key?(key) ⇒ `Boolean` Also known as: #include?, #has_key?, #member?