在ruby中减去两个相同哈希值

Question

我有两个结构相同的哈希......

hash1 = {:total=>{:gold=>100, :dark=>500}, :defensive=>{:gold=>100, :dark=>500}}
hash2 = {:total=>{:gold=>20, :dark=>200}, :defensive=>{:gold=>20, :dark=>200}}

我想减去并返回以下结果......

hash1 - hash2 => {:total=>{:gold=>80, :dark=>300}, :defensive=>{:gold=>80, :dark=>300}}

也许不推荐这种类型的操作.我也很感激这些反馈.:-)

Answer 1

我会这样做:

hash1 = {:total=>{:gold=>100, :dark=>500}, :defensive=>{:gold=>100, :dark=>500}}
hash2 = {:total=>{:gold=>20, :dark=>200}, :defensive=>{:gold=>20, :dark=>200}}

hash1.merge(hash2) { |_, l, r| l.merge(r) { |_, x, y| x - y } }
#=> {:total=>{:gold=>80, :dark=>300}, :defensive=>{:gold=>80, :dark=>300}}