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我有一个对象数组。我需要按组和儿童对这个数组进行分组。我试图创建一个新数组,其中组名作为键和值作为按组分组的排序数组,但没有给我例外格式。我该怎么做?
以下是我的数据格式:
var data1 = [{
"name": "Apparel","categoryID": 2742,"categoryname": "Men",},{
"name": "Fragrances","categoryID": 2746,{
"name": "Apparel","categoryname": "Women",}
];
预期输出是:
var data2 = [{
"categoryname": "Men","children": [{
"name": "Apparel","categoryID": 2742
},{
"name": "Fragrances","categoryID": 2746
}
]
},{
"categoryname": "Women","categoryID": 2746
}
]
}
]
我使用过这个函数,但输出不符合预期,但非常接近解决方案
function groupAndSort(array,groupFIEld,sortFIEld) {
var groups = {}; // This object will end being keyed by groups,and elements will be arrays of the rows within the given array,which have been sorted by the sortFIEld
// Put all the rows into groups
for (var i = 0; i < array.length; i++) {
var row = arraY[i];
var groupValue = row[groupFIEld];
groups[groupValue] = groups[groupValue] || [];
groups[groupValue].push(row);
}
// Sort each group
for (var groupValue in groups) {
groups[groupValue] = groups[groupValue].sort(function(a,b) {
return a[sortFIEld] - b[sortFIEld];
});
}
// Return the results
return groups;
}
groupAndSort(data1,"categoryname","position"))
这是该代码的输出:
{
Men: [{
categoryID: 2742,categoryname: "Men",name: "Apparel"
},{
categoryID: 2746,name: "Fragrances"
}],Women: [{
categoryID: 2742,categoryname: "Women",name: "Fragrances"
}]
}
我非常接近解决方案,我只需要一些帮助即可按预期完成,非常感谢您的帮助
从上次停止的地方开始,您所要做的就是遍历对象并将键和关联的数组推送到新的最终数组。
const data = {
Men: [{
categoryId: 2742,categoryName: "Men",Name: "Apparel"
},{
categoryId: 2746,Name: "Fragrances"
}],Women: [{
categoryId: 2742,categoryName: "Women",Name: "Fragrances"
}]
}
const final = [];
for (const key in data) {
final.push({
categoryName: key,children: data[key]
})
}
console.log(final);
,
您需要分组对象的 Object.values()
const group = {};
data1.forEach(({CategoryName,...rest})=>{
group[categoryName] = group[categoryName] || {CategoryName,children:[]};
group[categoryName].children.push(rest)
});
const res = Object.values(group)
console.log(res)
<script>
var data1 = [
{
"Name": "Apparel","categoryId": 2742,"categoryName": "Men",},{
"Name": "Fragrances","categoryId": 2746,{
"Name": "Apparel","categoryName": "Women",}
];
</script>
,
groups 对象的键是 categoryName,值是 children 数组,所以一个简单的映射:
// Return the results
// return groups;
return Object.entries(groups).map(([categoryName,children]) => ({CategoryName,children}));
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