javascript - 角度打字稿如何展平嵌套数组以仅查找具有特定条件的对象

Question

我有以下数组对象。我想展平数组以仅获取名称包含“Martin”的对象

源数组：

[
    {
        "id": 302,
        "name": "David Martin",
        "subordinates": [
            {
                "id": 265,
                "name": "Martin Regan",
            },
            {
                "id": 300,
                "name": "William Baker",
            },
            {
                "id": 301,
                "name": "Anthony Mazzarino",
                "subordinates": [
                    {
                        "id": 11245,
                        "name": "Martin Lozano",
                    }
                ]
            }
        ]
    },
    {
        "id": 10441,
        "name": "Martin Delage De Luget"    
    }
]

预期结果：

[
    {
        "id": 302,
        "userGuid": "66d6fd24-0e22-4384-9181-f72c4e81cefd",
        "name": "David Martin"  
    },
    {
        "id": 265,
        "name": "Martin Regan",
    },
    {
        "id": 11245,
        "name": "Martin Lozano",
    }   
]

标签： javascript

Answer 1

在这些情况下，递归总是一个简单的解决方案：

flatElements = (array, keyword) => {

  // Recursive function
  const traverse = (subArray, acc = []) => {

    subArray.forEach(element => {

      const {id, name, subordinates} = element;

      // If object with certain condition push it in the resulting acc 
      if (element.name.contains(keyword)) {
        acc.push({id, name});
      }

      // If subordinates exist, traverse them deeply
      if (subordinates) {
          traverse(subordinates, acc);
      }

    });

    // Return accumulator
    return acc;

  }
  
  return traverse(array, []);
  
}