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| author | Rafael Mendonça França <rafaelmfranca@gmail.com> | 2012-05-23 11:41:58 -0700 |
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| committer | Rafael Mendonça França <rafaelmfranca@gmail.com> | 2012-05-23 11:41:58 -0700 |
| commit | 7a23ada0e5b30e4b511be7a39385121255503e2a (patch) | |
| tree | cc015acd11a3ab3d13748d79aef115e1bc7b0ce8 /guides/source | |
| parent | 82b05fbcf4869517c08fb62398b03f3f133c0a28 (diff) | |
| parent | 2b5b60fc3c4251536b837937391ebdd028892b15 (diff) | |
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Merge pull request #6466 from markmcspadden/hash_deep_transform_keys
Add Hash#deep_transform_keys and Hash#deep_transform_keys! Also convert ...
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!+ |