How to rename or transform keys in a hash?
Ruby provides a way to rename keys in a hash using the transform_keys method.
Rename keys in a hash
Provide an hash argument to map old keys to new keys. Any key not given will be mapped using the provided block, or remain the same if no block is given.
For example:
h = { foo: 0, bar: 1, baz: 2 }
#=> {:foo=>0, :bar=>1, :baz=>2}
h.transform_keys(&:to_s)
#=> {"foo"=>0, "bar"=>1, "baz"=>2}
h.transform_keys(foo: :bar, bar: :foo)
#=> {:bar=>0, :foo=>1, :baz=>2}
h.transform_keys(foo: :hello, &:to_s)
#=> {:hello=>0, "bar"=>1, "baz"=>2}