按键对JavaScript对象排序
我有一个具有以下格式的对象集合:按键对JavaScript对象排序,javascript,Javascript,我有一个具有以下格式的对象集合: { { "articleId": "a0sf1000004najmAAA", "articleName": "A value for name", "footnote": "", "mainCat": "A Category 1", "subCat": "A SubCategory 1", }, { "articleId": "a0sf1000004najmAAA", "articleName":
{
{
"articleId": "a0sf1000004najmAAA",
"articleName": "A value for name",
"footnote": "",
"mainCat": "A Category 1",
"subCat": "A SubCategory 1",
}, {
"articleId": "a0sf1000004najmAAA",
"articleName": "A value for name",
"footnote": "",
"mainCat": "A Category 1",
"subCat": "A SubCategory 2",
},
}
经过缩减和分组后,我希望得到以下信息:
{
"A Category 1": {
"A SubCategory 1": {
{
some items belonging to SubCat 1 and Cat 1
}
},
"A SubCategory 2": {
{
some items belonging to SubCat 2 and Cat 1
}
}
}
}
现在,我可以返回所有按子类别分组的文章,但如何按主类别分组子类别
var catalog = data;
var groupBySubCat = catalog.reduce(function(obj, item) {
obj[item.subCat] = obj[item.subCat] || [];
obj[item.subCat].push(item);
return obj;
}, {});
var groups = Object.keys(groupBySubCat).map(function(key) {
return {
subCat: key,
tests: groupBySubCat[key]
};
});
var maingroups = Object.keys(groupBySubCat).map(function(key) {
return {
subCat: key,
tests: groupBySubCat[key]
};
});
如有任何改进,将不胜感激。此功能应能完成此工作
function getGroupedByCategory(list){
var ret = {}
for(var i=0;i<list.length;i++){
var mainCat = list[i].mainCat
var subCat = list[i].subCat
if(!ret[mainCat]) // check if mainCat key exists
ret[mainCat] = {} // if not create new object
if(!ret[mainCat][subCat]) // check if subCat exists in mainCat object
ret[mainCat][subCat] = [] // if not create new list
ret[mainCat][subCat].push(list[i]) // push current element in the designated list
}
return ret
}
函数getGroupedByCategory(列表){
var ret={}
对于(var i=0;iIs:原始json数据中存在键入错误?即使我希望有数组,但没有括号。您想对它们进行分组,还是对它们进行排序?请注意,对象属性是无序的。您的标题提到了
排序
…您的代码没有排序…感谢@Obsidian Age编辑我的代码并澄清了b使用广告词汇。重点是实际分组,而不是排序。曼努埃尔·奥托给出的答案正是我所需要的。