How do I add the two values together in this Ruby Hash?

Question

I would like to add the values of this hash together, and output the total.

b = {"Mike"=>100, "Jim"=>20}

Answer 1

b.values.inject(:+)

will work.

Answer 2

You do as below

hash = {"Mike"=>100, "Jim"=>20}
hash.values.reduce(:+) # => 120
# or
hash.reduce(0) { |sum,(_, v)| sum + v } # => 120

Read this powerful method Enumerable#reduce.