Ramda 根據一個屬性比較兩個 arrays 的對象

Question

我有 2 個 arrays：

arr1 = [
    {
      id: "1",
      name: "Test 1"
    },
    {
      id: "2",
      name: "Test 2"
    }
]

arr2 = [
    {
      groupId: "125",
      age: 44,
      subGroup: {
        id: "1",
        name: "Test 1"
      }
    }
]

使用 Ramda，我需要比較 arr1 和 arr2，並根據 id (id: "1") 從 arr2 返回匹配的 object

所以結果應該是：

[
    {
      groupId: "125",
      age: 44,
      subGroup: {
        id: "1",
        name: "Test 1"
      }
    }
]

Answer 1

使用R.innerJoin()在兩個 arrays （ arr2和arr1 ）之間相交，並從第一個數組（在您的情況下為arr2 ）獲取項目：

 const fn = R.innerJoin((a, b) => a.subGroup?.id === b.id) const arr1 = [{"id":"1","name":"Test 1"},{"id":"2","name":"Test 2"}] const arr2 = [{"groupId":"125","age":44,"subGroup":{"id":"1","name":"Test 1"}},{"groupId":"126","age":46}] const result = fn(arr2, arr1) console.log(result)

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