| Class | HashWithIndifferentAccess |
| In: |
vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
|
| Parent: | Hash |
This class has dubious semantics and we only have it so that people can write params[:key] instead of params[‘key’] and they get the same value for both keys.
| []= | -> | regular_writer |
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 6
6: def initialize(constructor = {})
7: if constructor.is_a?(Hash)
8: super()
9: update(constructor)
10: else
11: super(constructor)
12: end
13: end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 109
109: def convert_key(key)
110: key.kind_of?(Symbol) ? key.to_s : key
111: end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 113
113: def convert_value(value)
114: case value
115: when Hash
116: value.with_indifferent_access
117: when Array
118: value.collect { |e| e.is_a?(Hash) ? e.with_indifferent_access : e }
119: else
120: value
121: end
122: end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 15
15: def default(key = nil)
16: if key.is_a?(Symbol) && include?(key = key.to_s)
17: self[key]
18: else
19: super
20: end
21: end
Removes a specified key from the hash.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 95
95: def delete(key)
96: super(convert_key(key))
97: end
Returns an exact copy of the hash.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 84
84: def dup
85: HashWithIndifferentAccess.new(self)
86: end
Fetches the value for the specified key, same as doing hash[key]
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 68
68: def fetch(key, *extras)
69: super(convert_key(key), *extras)
70: end
Checks the hash for a key matching the argument passed in:
hash = HashWithIndifferentAccess.new hash["key"] = "value" hash.key? :key # => true hash.key? "key" # => true
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 59
59: def key?(key)
60: super(convert_key(key))
61: end
Merges the instantized and the specified hashes together, giving precedence to the values from the second hash Does not overwrite the existing hash.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 90
90: def merge(hash)
91: self.dup.update(hash)
92: end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 99
99: def stringify_keys!; self end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 100
100: def symbolize_keys!; self end
Convert to a Hash with String keys.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 104
104: def to_hash
105: Hash.new(default).merge(self)
106: end
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 101
101: def to_options!; self end
Updates the instantized hash with values from the second:
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!"}
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 45
45: def update(other_hash)
46: other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) }
47: self
48: end
Returns an array of the values at the specified indices:
hash = HashWithIndifferentAccess.new
hash[:a] = "x"
hash[:b] = "y"
hash.values_at("a", "b") # => ["x", "y"]
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb, line 79
79: def values_at(*indices)
80: indices.collect {|key| self[convert_key(key)]}
81: end