diff options
Diffstat (limited to 'activesupport/lib')
-rw-r--r-- | activesupport/lib/active_support/core_ext/hash/keys.rb | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb index 988a0b5949..8e728691c6 100644 --- a/activesupport/lib/active_support/core_ext/hash/keys.rb +++ b/activesupport/lib/active_support/core_ext/hash/keys.rb @@ -1,8 +1,10 @@ class Hash # Return a new hash with all keys converted using the block operation. # - # { :name => 'Rob', :years => '28' }.transform_keys{ |key| key.to_s.upcase } - # # => { "NAME" => "Rob", "YEARS" => "28" } + # hash = { name: 'Rob', age: '28' } + # + # hash.transform_keys{ |key| key.to_s.upcase } + # # => { "NAME" => "Rob", "AGE" => "28" } def transform_keys result = {} keys.each do |key| @@ -22,8 +24,10 @@ class Hash # Return a new hash with all keys converted to strings. # - # { :name => 'Rob', :years => '28' }.stringify_keys - # #=> { "name" => "Rob", "years" => "28" } + # hash = { name: 'Rob', age: '28' } + # + # hash.stringify_keys + # #=> { "name" => "Rob", "age" => "28" } def stringify_keys transform_keys{ |key| key.to_s } end @@ -37,8 +41,10 @@ class Hash # Return a new hash with all keys converted to symbols, as long as # they respond to +to_sym+. # - # { 'name' => 'Rob', 'years' => '28' }.symbolize_keys - # #=> { :name => "Rob", :years => "28" } + # hash = { 'name' => 'Rob', 'age' => '28' } + # + # hash.symbolize_keys + # #=> { name: "Rob", age: "28" } def symbolize_keys transform_keys{ |key| key.to_sym rescue key } end @@ -69,8 +75,10 @@ class Hash # This includes the keys from the root hash and from all # nested hashes. # - # { :person => { :name => 'Rob', :years => '28' } }.deep_transform_keys{ |key| key.to_s.upcase } - # # => { "PERSON" => { "NAME" => "Rob", "YEARS" => "28" } } + # 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) result = {} each do |key, value| |