ruby - 通过另一个哈希过滤 Ruby 哈希数组

Question

也许我遗漏了一些明显的东西。用另一个散列或多个键/值对过滤一个散列似乎很棘手。

fruit = [
  { name: "apple",   color: "red",    pieable: true  },
  { name: "orange",  color: "orange", pieable: false },
  { name: "grape",   color: "purple", pieable: false },
  { name: "cherry",  color: "red",    pieable: true  },
  { name: "banana",  color: "yellow", pieable: true  },
  { name: "tomato",  color: "red",    pieable: false }
]
filter = { color: "red", pieable: true }

# some awesome one-liner? would return
[
  { name: "apple",   color: "red",    pieable: true  },
  { name: "cherry",  color: "red",    pieable: true  }
]      

我认为哈希数组不是问题所在。我什至不知道如何通过另一个任意哈希来测试哈希。我正在使用 Rails，所以 active_support 等之外的任何东西都可以。

Answer 1

可以做成一个衬垫。但是多行更简洁。

fruit.select do |hash| # or use select!
  filter.all? do |key, value|
    value == hash[key]
  end
end