我有2个哈希,例如:

{'a' => 30, 'b' => 14}
{'a' => 4, 'b' => 23, 'c' => 7}

其中abc是对象。我如何总结这些哈希的键,以获得一个新的哈希,像:
{'a' => 34, 'b' => 37, 'c' => 7}

最佳答案

a_hash = {'a' => 30, 'b' => 14}
b_hash = {'a' => 4, 'b' => 23, 'c' => 7}

a_hash.merge(b_hash){ |k, a_value, b_value| a_value + b_value }
=> {"a"=>34, "b"=>37, "c"=>7}

b_hash.merge(a_hash){ |k, b_value, a_value| a_value + b_value }
=> {"a"=>34, "b"=>37, "c"=>7}

关于ruby - 用相同的键求和2哈希属性,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/4091487/

10-15 17:48