How to change Hash values?

Question

I\'d like to replace each value in a hash with value.some_method.

For example, for given a simple hash:

{\"a\" => \"b\",         


        

Answer 1

new_hash = old_hash.merge(old_hash) do |_key, value, _value|
             value.upcase
           end

# old_hash = {"a" => "b", "c" => "d"}
# new_hash = {"a" => "B", "c" => "D"}