数组对象实现一 一对比（索引和id相同的保留原数据，原数组没有的数据从默认列表加进去）

数组对象实现一 一对比（索引和id相同的保留原数据，原数组没有的数据从默认列表加进去）
  // 接口数据（缺数据）
    let arr1 = [
      {
    
        left: [
          {
     id: 1, name: "cc", check: true, displayName: "检测框IOU" },
          {
     id: 2, name: "yy", check: true, displayName: "aaa" },
          {
     id: 3, name: "dd", check: false, displayName: "ixxxxou" },
        ],
      },
      {
    
        left: [
          {
     id: 1, name: "cc", check: false, displayName: "iou" },
          {
     id: 2, name: "yy", check: true, displayName: "aaa" },
          {
     id: 3, name: "dd", check: true, displayName: "ixxxxou" },
        ],
      },
    ];
	// 默认数据（全数据）
    let arr2 = [
      {
    
        left: [
          {
     id: 1, name: "cc", check: false, displayName: "检测框IOU" },
          {
     id: 2, name: "yy", check: false, displayName: "aaa" },
          {
     id: 3, name: "dd", check: false, displayName: "ixxxxou" },
          {
     id: 4, name: "dd", check: false, displayName: "xin1" },
          {
     id: 5, name: "dd", check: false, displayName: "xin2" },
        ],
      },
    ];

	arr1.forEach((item1,index1)=>{
    
		let arr3 = item1.left
		arr2[0].left.forEach((item2)=>{
    
			let isEqual = false;
			arr3.forEach((item3)=>{
    
				if(item2.id === item3.id){
    
					isEqual = true;
					return false;
				}
			})
			if(!isEqual){
    
				arr1[index1].left.push(item2);
			}
		})
	})
console.log(arr1)//最终拼接好的数组
arr1: [
      {
    
        left: [
          {
     id: 1, name: "cc", check: true, displayName: "检测框IOU" },
          {
     id: 2, name: "yy", check: true, displayName: "aaa" },
          {
     id: 3, name: "dd", check: false, displayName: "ixxxxou" },
          {
     id: 4, name: "dd", check: false, displayName: "xin1" },
          {
     id: 5, name: "dd", check: false, displayName: "xin2" },
        ],
      },
      {
    
        left: [
          {
     id: 1, name: "cc", check: false, displayName: "iou" },
          {
     id: 2, name: "yy", check: true, displayName: "aaa" },
          {
     id: 3, name: "dd", check: true, displayName: "ixxxxou" },
          {
     id: 4, name: "dd", check: false, displayName: "xin1" },
          {
     id: 5, name: "dd", check: false, displayName: "xin2" },
        ],
      },
    ];