diff options
| -rw-r--r-- | activesupport/lib/active_support/core_ext/hash/keys.rb | 14 | ||||
| -rw-r--r-- | activesupport/lib/active_support/core_ext/hash/transform_values.rb | 11 |
2 files changed, 17 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 c30044b9ff..05679f1dd0 100644 --- a/activesupport/lib/active_support/core_ext/hash/keys.rb +++ b/activesupport/lib/active_support/core_ext/hash/keys.rb @@ -1,10 +1,14 @@ class Hash - # Returns a new hash with all keys converted using the block operation. + # 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"} + # hash.transform_keys { |key| key.to_s.upcase } # => {"NAME"=>"Rob", "AGE"=>"28"} + # + # If you do not provide a +block+, it will return an Enumerator + # for chaining with other methods: + # + # hash.transform_keys.with_index { |k, i| [k, i].join } # => {"name0"=>"Rob", "age1"=>"28"} def transform_keys return enum_for(:transform_keys) unless block_given? result = self.class.new @@ -14,8 +18,8 @@ class Hash result end - # Destructively converts all keys using the block operations. - # Same as transform_keys but modifies +self+. + # Destructively converts 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| diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb index 6b3402b2c9..9ddb838774 100644 --- a/activesupport/lib/active_support/core_ext/hash/transform_values.rb +++ b/activesupport/lib/active_support/core_ext/hash/transform_values.rb @@ -2,8 +2,12 @@ class Hash # Returns a new hash with the results of running +block+ once for every value. # The keys are unchanged. # - # { a: 1, b: 2, c: 3 }.transform_values { |x| x * 2 } - # # => { a: 2, b: 4, c: 6 } + # { a: 1, b: 2, c: 3 }.transform_values { |x| x * 2 } # => { a: 2, b: 4, c: 6 } + # + # If you do not provide a +block+, it will return an Enumerator + # for chaining with other methods: + # + # { a: 1, b: 2 }.transform_values.with_index { |v, i| [v, i].join.to_i } # => { a: 10, b: 21 } def transform_values return enum_for(:transform_values) unless block_given? return {} if empty? @@ -14,7 +18,8 @@ class Hash result end - # Destructive +transform_values+ + # Destructively converts all values using the +block+ operations. + # Same as +transform_values+ but modifies +self+. def transform_values! return enum_for(:transform_values!) unless block_given? each do |key, value| |