method
deep_transform_keys
v7.1.3.4 -
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Class: Hash
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- What's this?
deep_transform_keys(&block)
public
Returns a new hash with all keys converted by the block operation. This includes the keys from the root hash and from all nested hashes and arrays.
hash = { person: { name: 'Rob', age: '28' } } hash.deep_transform_keys{ |key| key.to_s.upcase } # => {"PERSON"=>{"NAME"=>"Rob", "AGE"=>"28"}}