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

There's a method for that in ActiveSupport v4.2.0. It's called transform_values and basically just executes a block for each key-value-pair.

Since they're doing it with a each I think there's no better way than to loop through.

hash = {sample: 'gach'}

result = {}
hash.each do |key, value|
  result[key] = do_stuff(value)
end

Update:

Since Ruby 2.4.0 you can natively use #transform_values and #transform_values!.