有如下数组:
{ type: "Case", id: 1001, parent_id: null },
{ type: "Step", id: 1002, parent_id: 1001},
{ type: "Case", id: 1003, parent_id: 1002},
{ type: "Step", id: 1004, parent_id: 1003},
{ type: "Func", id: 1005, parent_id: 1004},
{ type: "Func", id: 1006, parent_id: 1004},
{ type: "Func", id: 1007, parent_id: 1004},
{ type: "Func", id: 1008, parent_id: 1004},
{ type: "Func", id: 1009, parent_id: 1004},
{ type: "Func", id: 1010, parent_id: 1004},
{ type: "Func", id: 1011, parent_id: 1004},
{ type: "Func", id: 1012, parent_id: 1004},
{ type: "Func", id: 1013, parent_id: 1002 }
]```
如何将上述数组转变成下列数组呢?
```[{
type: "Case",
id: 1001,
parent_id: null,
children: [{
type: "Step",
id: 1002,
parent_id: 1001,
children: [{
type: "Case",
id: 1003,
parent_id: 1002,
children: [{
type: "Step",
id: 1004,
parent_id: 1003,
children: [
{ type: "Func", id: 1005, parent_id: 1004 },
{ type: "Func", id: 1006, parent_id: 1004 },
{ type: "Func", id: 1007, parent_id: 1004 },
{ type: "Func", id: 1008, parent_id: 1004 },
{ type: "Func", id: 1009, parent_id: 1004 },
{ type: "Func", id: 1010, parent_id: 1004 },
{ type: "Func", id: 1011, parent_id: 1004 },
{ type: "Func", id: 1012, parent_id: 1004 }
]
}, ]
},
{ type: "Func", id: 1013, parent_id: 1002 },
{ type: "Func", id: 1013, parent_id: 1002 }
]
}]
}] ```
**注:数组还可能有更多层次**