获取 ruby 中所有键的总和

Question

How would I get the sum of keys if they have different values in ruby?

{"dog"=>1, "cat"=>3, "fish"=>5} = 9

Answer 1

The keys in your example are strings, the values are integers. If you want the sum of the integers you can do hash.values.sum :

{"dog"=>1, "cat"=>3, "fish"=>5}.values.sum
#=> 9