/usr/lib/ruby/vendor_ruby/active_support/core_ext/hash/keys.rb is in ruby-activesupport 2:4.2.10-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | class Hash
# Returns a new hash with all keys converted using the block operation.
#
# hash = { name: 'Rob', age: '28' }
#
# hash.transform_keys{ |key| key.to_s.upcase }
# # => {"NAME"=>"Rob", "AGE"=>"28"}
def transform_keys
return enum_for(:transform_keys) unless block_given?
result = self.class.new
each_key do |key|
result[yield(key)] = self[key]
end
result
end
# Destructively convert all keys using the block operations.
# Same as transform_keys but modifies +self+.
def transform_keys!
return enum_for(:transform_keys!) unless block_given?
keys.each do |key|
self[yield(key)] = delete(key)
end
self
end
# Returns a new hash with all keys converted to strings.
#
# hash = { name: 'Rob', age: '28' }
#
# hash.stringify_keys
# # => {"name"=>"Rob", "age"=>"28"}
def stringify_keys
transform_keys{ |key| key.to_s }
end
# Destructively convert all keys to strings. Same as
# +stringify_keys+, but modifies +self+.
def stringify_keys!
transform_keys!{ |key| key.to_s }
end
# Returns a new hash with all keys converted to symbols, as long as
# they respond to +to_sym+.
#
# hash = { 'name' => 'Rob', 'age' => '28' }
#
# hash.symbolize_keys
# # => {:name=>"Rob", :age=>"28"}
def symbolize_keys
transform_keys{ |key| key.to_sym rescue key }
end
alias_method :to_options, :symbolize_keys
# Destructively convert all keys to symbols, as long as they respond
# to +to_sym+. Same as +symbolize_keys+, but modifies +self+.
def symbolize_keys!
transform_keys!{ |key| key.to_sym rescue key }
end
alias_method :to_options!, :symbolize_keys!
# Validate all keys in a hash match <tt>*valid_keys</tt>, raising
# ArgumentError on a mismatch.
#
# Note that keys are treated differently than HashWithIndifferentAccess,
# meaning that string and symbol keys will not match.
#
# { name: 'Rob', years: '28' }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key: :years. Valid keys are: :name, :age"
# { name: 'Rob', age: '28' }.assert_valid_keys('name', 'age') # => raises "ArgumentError: Unknown key: :name. Valid keys are: 'name', 'age'"
# { name: 'Rob', age: '28' }.assert_valid_keys(:name, :age) # => passes, raises nothing
def assert_valid_keys(*valid_keys)
valid_keys.flatten!
each_key do |k|
unless valid_keys.include?(k)
raise ArgumentError.new("Unknown key: #{k.inspect}. Valid keys are: #{valid_keys.map(&:inspect).join(', ')}")
end
end
end
# Returns a new hash with all keys converted by the block operation.
# This includes the keys from the root hash and from all
# nested hashes and arrays.
#
# hash = { person: { name: 'Rob', age: '28' } }
#
# hash.deep_transform_keys{ |key| key.to_s.upcase }
# # => {"PERSON"=>{"NAME"=>"Rob", "AGE"=>"28"}}
def deep_transform_keys(&block)
_deep_transform_keys_in_object(self, &block)
end
# Destructively convert all keys by using the block operation.
# This includes the keys from the root hash and from all
# nested hashes and arrays.
def deep_transform_keys!(&block)
_deep_transform_keys_in_object!(self, &block)
end
# Returns a new hash with all keys converted to strings.
# This includes the keys from the root hash and from all
# nested hashes and arrays.
#
# hash = { person: { name: 'Rob', age: '28' } }
#
# hash.deep_stringify_keys
# # => {"person"=>{"name"=>"Rob", "age"=>"28"}}
def deep_stringify_keys
deep_transform_keys{ |key| key.to_s }
end
# Destructively convert all keys to strings.
# This includes the keys from the root hash and from all
# nested hashes and arrays.
def deep_stringify_keys!
deep_transform_keys!{ |key| key.to_s }
end
# Returns a new hash with all keys converted to symbols, as long as
# they respond to +to_sym+. This includes the keys from the root hash
# and from all nested hashes and arrays.
#
# hash = { 'person' => { 'name' => 'Rob', 'age' => '28' } }
#
# hash.deep_symbolize_keys
# # => {:person=>{:name=>"Rob", :age=>"28"}}
def deep_symbolize_keys
deep_transform_keys{ |key| key.to_sym rescue key }
end
# Destructively convert all keys to symbols, as long as they respond
# to +to_sym+. This includes the keys from the root hash and from all
# nested hashes and arrays.
def deep_symbolize_keys!
deep_transform_keys!{ |key| key.to_sym rescue key }
end
private
# support methods for deep transforming nested hashes and arrays
def _deep_transform_keys_in_object(object, &block)
case object
when Hash
object.each_with_object({}) do |(key, value), result|
result[yield(key)] = _deep_transform_keys_in_object(value, &block)
end
when Array
object.map {|e| _deep_transform_keys_in_object(e, &block) }
else
object
end
end
def _deep_transform_keys_in_object!(object, &block)
case object
when Hash
object.keys.each do |key|
value = object.delete(key)
object[yield(key)] = _deep_transform_keys_in_object!(value, &block)
end
object
when Array
object.map! {|e| _deep_transform_keys_in_object!(e, &block)}
else
object
end
end
end
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