diff options
Diffstat (limited to 'activesupport/lib/active_support')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/hash.rb | 1 | ||||
| -rw-r--r-- | activesupport/lib/active_support/core_ext/hash/transform_values.rb | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash.rb b/activesupport/lib/active_support/core_ext/hash.rb index f68e1662f9..af4d1da0eb 100644 --- a/activesupport/lib/active_support/core_ext/hash.rb +++ b/activesupport/lib/active_support/core_ext/hash.rb @@ -6,3 +6,4 @@ require 'active_support/core_ext/hash/indifferent_access' require 'active_support/core_ext/hash/keys' require 'active_support/core_ext/hash/reverse_merge' require 'active_support/core_ext/hash/slice' +require 'active_support/core_ext/hash/transform_values' diff --git a/activesupport/lib/active_support/core_ext/hash/transform_values.rb b/activesupport/lib/active_support/core_ext/hash/transform_values.rb new file mode 100644 index 0000000000..6ff7e91212 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/hash/transform_values.rb @@ -0,0 +1,21 @@ +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 } + def transform_values(&block) + result = self.class.new + each do |key, value| + result[key] = yield(value) + end + result + end + + # Destructive +transform_values+ + def transform_values! + each do |key, value| + self[key] = yield(value) + end + end +end |