method
transform_keys
v5.0.0.1 -
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Class: Hash
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- What's this?
transform_keys()
public
Returns a new hash with all keys converted using the block operation.
hash = { name: 'Rob', age: '28' } hash.transform_keys { |key| key.to_s.upcase } # => {"NAME"=>"Rob", "AGE"=>"28"}
If you do not provide a block, it will return an Enumerator for chaining with other methods:
hash.transform_keys.with_index { |k, i| [k, i].join } # => {"name0"=>"Rob", "age1"=>"28"}