js将数组对象中，以某个值相同的对象合并成⼀个；即把某个值
相同的对象内容合并成⼀个
以下列数据为例，总共有13条数据，把label相同的数据，⾥⾯的children合并成⼀个代码在最后
1、初始化数据
2.结果
3.代码
let testArr = [
{
label: "考区/考点",
prop: "deptNames",
row: true,
search: true,
width: 200,
editDisabled: true,
expand: true,
hide: true,
defaultExpandAll: false,
type: "tree",
dicUrl: "/test/boltdept/getAreaAndPointTree",
props: {
label: "deptName",
value: "deptId",
children: "children",
},
},
{
label: "机构",
prop: "deptName",
type: "select",
row: true,
editDisplay: false,
search: false,
dicUrl: "/test/dict/getDictsByCode?dictCode=kw_tag_type",          props: {
label: "dictValue",
value: "dictKey",
},
},
{
label: "单位等级",
prop: "deptLeve",
editDisplay: false,
search: true,
hide: true,
row: true,
span: 15,
type: "select",
dicQuery: {
materialDictType: 0,
},
dicUrl: "/test/materialdictsetting/selectViewLevelList",
props: {
label: "dictValue",
value: "dictKey",
},
},
{
label: "机构等级",
row: true,
search: false,
editDisabled: true,
width: 200,
type: "select",
prop: "deptLevel",
dicUrl: "/test/dict/getDictsByCode?dictCode=kw_dept_level",          props: {
label: "dictValue",
value: "dictKey",
},
},
{
label: "语⽂",
prop: "203311500001",
row: true,
children: [
{
label: "备⽤卷",
prop: "203311500001_85975601163943937",
},
],
},
{
label: "数学",
prop: "203311500002",
row: true,
children: [
{
label: "备⽤卷",
prop: "203311500002_85975601163943937",
},
],
},
{
label: "数学",
prop: "203311500002",
row: true,
children: [
{
label: "test_3",
prop: "203311500002_84857933463703554",            },
],
},
{
label: "英语",
prop: "203311500004",
row: true,
children: [
{
label: "备⽤卷",
prop: "203311500004_85975601163943937",            },
],
},
{
label: "英语",
prop: "203311500004",
row: true,
children: [
{
label: "test_3",
prop: "203311500004_84857933463703554",            },
]
,
},
{
label: "印刷材料",
prop: null,
row: true,
children: [
{
label: "cs",
prop: "84563743102074881",
},
]
,
},
{
label: "印刷材料",
prop: null,
row: true,
children: [
{
label: "test_1",
prop: "84507262931640321",
},
]
,
},
{
label: "印刷材料",
prop: null,
row: true,
children: [
{
label: "测试啊",
prop: "84172603177795585",
},
]
,
},
{
label: "印刷材料",
prop: null,
row: true,
children: [
{
label: "test",
prop: "84173239118168066",
},
]
,
},
];
console.log(testArr);
function mergeArr(testArr) {
var tempArr = [];
var afterData = [];
for (let i = 0; i < testArr.length; i++) {
if (tempArr.indexOf(testArr[i].label) === -1) {
afterData.push({
label: testArr[i].label,
children: [testArr[i]],
prop: testArr[i].prop,
});
tempArr.push(testArr[i].label);
js合并两个数组} else {
for (let j = 0; j < afterData.length; j++) {
if (
(afterData[j].label == testArr[i].label) &
testArr[i].hasOwnProperty("children")
) {
afterData[j].children.push(testArr[i]);
break;
}
}
}
}
console.log(afterData, "初次结果");
afterData.forEach((item) => {
item.childrenOne = [];
item.children.forEach((y) => {
//  console.log(y, "----", y.children);
if (y.children != undefined) {
item.childrenOne.push(y.children[0]);
}
});
});
let jj = afterData;
jj.forEach((item, index) => {
item.children = [];
item.children = item.childrenOne;
delete jj[index].childrenOne;
if (jj[index].children.length == 0) {
delete jj[index].children;
}
});
console.log(jj);
return jj
}
console.Arr(testArr), "---最终结果");

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