Question

我需要基于键对每个哈希行的值求和。

在下面的示例中，我需要将A与A，B与B，C与C，D与D的所有行相加，最后返回具有完整值的单个哈希。

{adv=>{:a=>10, :b=>180, :c=>30, :d=>15}}

{adv=>{:a=>15, :b=>120, :c=>60, :d=>100}}

{adv=>{:a=>20, :b=>120, :c=>90, :d=>25}}

Answer 1

list = [
  {:adv=>{:a=>10, :b=>180, :c=>30, :d=>15}},
  {:adv=>{:a=>15, :b=>120, :c=>60, :d=>100}},
  {:adv=>{:a=>20, :b=>120, :c=>90, :d=>25}}
]

result = list.reduce do |memo, hsh|
  {
    adv: memo[:adv].merge(hsh[:adv]) do |key, val1, val2|
      val1 + val2
    end
  }
end

puts result
# => {:adv=>{:a=>45, :b=>420, :c=>180, :d=>140}}

根据列求和

1 个答案: