diff options
Diffstat (limited to 'guides/source/active_support_core_extensions.md')
-rw-r--r-- | guides/source/active_support_core_extensions.md | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/guides/source/active_support_core_extensions.md b/guides/source/active_support_core_extensions.md index ca023f7f66..fa32fc898e 100644 --- a/guides/source/active_support_core_extensions.md +++ b/guides/source/active_support_core_extensions.md @@ -2736,14 +2736,14 @@ NOTE: Defined in `active_support/core_ext/hash/except.rb`. The method `transform_keys` accepts a block and returns a hash that has applied the block operations to each of the keys in the receiver: ```ruby -{nil => nil, 1 => 1, a: :a}.transform_keys{ |key| key.to_s.upcase } +{nil => nil, 1 => 1, a: :a}.transform_keys { |key| key.to_s.upcase } # => {"" => nil, "A" => :a, "1" => 1} ``` The result in case of collision is undefined: ```ruby -{"a" => 1, a: 2}.transform_keys{ |key| key.to_s.upcase } +{"a" => 1, a: 2}.transform_keys { |key| key.to_s.upcase } # => {"A" => 2}, in my test, can't rely on this result though ``` @@ -2751,11 +2751,11 @@ This method may be useful for example to build specialized conversions. For inst ```ruby def stringify_keys - transform_keys{ |key| key.to_s } + transform_keys { |key| key.to_s } end ... def symbolize_keys - transform_keys{ |key| key.to_sym rescue key } + transform_keys { |key| key.to_sym rescue key } end ``` @@ -2764,7 +2764,7 @@ There's also the bang variant `transform_keys!` that applies the block operation Besides that, one can use `deep_transform_keys` and `deep_transform_keys!` to perform the block operation on all the keys in the given hash and all the hashes nested into it. An example of the result is: ```ruby -{nil => nil, 1 => 1, nested: {a: 3, 5 => 5}}.deep_transform_keys{ |key| key.to_s.upcase } +{nil => nil, 1 => 1, nested: {a: 3, 5 => 5}}.deep_transform_keys { |key| key.to_s.upcase } # => {""=>nil, "1"=>1, "NESTED"=>{"A"=>3, "5"=>5}} ``` |