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| author | Mark McSpadden <markmcspadden@gmail.com> | 2012-05-23 12:31:35 -0500 |
|---|---|---|
| committer | Mark McSpadden <markmcspadden@gmail.com> | 2012-05-23 13:11:06 -0500 |
| commit | 2b5b60fc3c4251536b837937391ebdd028892b15 (patch) | |
| tree | 94f6cbd72dba9be3f9bf15e422f6d45642dc7122 /guides/source | |
| parent | 541429fbe49b0671adb3842ab1818230d670ef9f (diff) | |
| download | rails-2b5b60fc3c4251536b837937391ebdd028892b15.tar.gz rails-2b5b60fc3c4251536b837937391ebdd028892b15.tar.bz2 rails-2b5b60fc3c4251536b837937391ebdd028892b15.zip | |
Add Hash#deep_transform_keys and Hash#deep_transform_keys! Also convert deep_*_keys to use deep_transform_keys.
Diffstat (limited to 'guides/source')
| -rw-r--r-- | guides/source/active_support_core_extensions.textile | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/guides/source/active_support_core_extensions.textile b/guides/source/active_support_core_extensions.textile index e2118e8f61..587f65529e 100644 --- a/guides/source/active_support_core_extensions.textile +++ b/guides/source/active_support_core_extensions.textile @@ -2579,6 +2579,13 @@ end There's also the bang variant +transform_keys!+ that applies the block operations to keys in the very receiver. +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, "1"=>1, "NESTED"=>{"A"=>3, "5"=>5}} +</ruby> + NOTE: Defined in +active_support/core_ext/hash/keys.rb+. h5. +stringify_keys+ and +stringify_keys!+ |