Class: Neo4j::Core::HashWithIndifferentAccess

Inherits:

Hash

• Object
• Hash
• Neo4j::Core::HashWithIndifferentAccess

show all

Defined in:

lib/neo4j-core/hash_with_indifferent_access.rb

Overview

Class Method Summary (collapse)

• + (Object) new_from_hash_copying_default(hash)

Instance Method Summary (collapse)

• - (Object) []=(key, value) (also: #store)

  Assigns a new value to the hash:.

• - (Object) default(key = nil)
• - (Object) delete(key)

  Removes a specified key from the hash.

• - (Object) dup

  Returns an exact copy of the hash.

• - (Boolean) extractable_options?

  Always returns true, so that Array#extract_options! finds members of this class.

• - (Object) fetch(key, *extras)

  Fetches the value for the specified key, same as doing hash.

• - (HashWithIndifferentAccess) initialize(constructor = {}) constructor

  A new instance of HashWithIndifferentAccess.

• - (Boolean) key?(key) (also: #include?, #has_key?, #member?)

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

• - (Object) merge(hash)

  Merges the instantized and the specified hashes together, giving precedence to the values from the second hash.

• - (Object) nested_under_indifferent_access
• - (Object) regular_update
• - (Object) regular_writer
• - (Object) reverse_merge(other_hash)

  Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second.

• - (Object) reverse_merge!(other_hash)
• - (Object) stringify_keys
• - (Object) stringify_keys!
• - (Object) symbolize_keys

  undef :symbolize_keys!.

• - (Object) to_hash

  Convert to a Hash with String keys.

• - (Object) to_options!
• - (Object) update(other_hash) (also: #merge!)

  Updates the instantized hash with values from the second:.

• - (Object) values_at(*indices)

  Returns an array of the values at the specified indices:.

• - (Object) with_indifferent_access

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 20

def initialize(constructor = {})
  if constructor.is_a?(Hash)
    super()
    update(constructor)
  else
    super(constructor)
  end
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 37

def self.new_from_hash_copying_default(hash)
  new(hash).tap do |new_hash|
    new_hash.default = hash.default
  end
end

hash = HashWithIndifferentAccess.new
hash[:key] = "value"

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 51

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 29

def default(key = nil)
  if key.is_a?(Symbol) && include?(key = key.to_s)
    self[key]
  else
    super
  end
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 133

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 110

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 8

def extractable_options?
  true
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 94

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

hash = HashWithIndifferentAccess.new
hash["key"] = "value"
hash.key? :key  # => true
hash.key? "key" # => true

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 85

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 118

def merge(hash)
  self.dup.update(hash)
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 16

def nested_under_indifferent_access
  self
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 44

alias_method :regular_update, :update

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 43

alias_method :regular_writer, :[]=

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 124

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 128

def reverse_merge!(other_hash)
  replace(reverse_merge( other_hash ))
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 138

def stringify_keys; dup end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 137

def stringify_keys!; self end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 140

def symbolize_keys; to_hash.symbolize_keys end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 144

def to_hash
  Hash.new(default).merge!(self)
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 141

def to_options!; self end

hash_1 = HashWithIndifferentAccess.new
hash_1[:key] = "value"

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

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 67

def update(other_hash)
  if other_hash.is_a? HashWithIndifferentAccess
    super(other_hash)
  else
    other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) }
    self
  end
end

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

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 105

def values_at(*indices)
  indices.collect {|key| self[convert_key(key)]}
end

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# File 'lib/neo4j-core/hash_with_indifferent_access.rb', line 12

def with_indifferent_access
  dup
end