我有一些看起来像这样的数据:
{
"mains": [{
"id": "454",
"name": "main 1",
"subs": [{
"id": "32",
"name": "sub 1"
}, {
"id": "23",
"name": "sub 2"
}, {
"id": "54",
"name": "sub 3"
}],
"image": null
}, {
"id": "654",
"name": "main 2",
"subs": [{
"id": "87",
"name": "sub 1"
}, {
"id": "78",
"name": "sub 2"
}],
"image": null
}]
}
由此我需要创建2个列表:
用于创建包含所有主电源的第一个列表...我已经完成了这个:
mainlist = [];
sublist = [];
for (var i = 0; i < data.mains.length; i++) {
var obj = data.mains[i];
var mnlst = obj.name;
mainlist.push(mnlst);
}
console.log(mainlist);
在此示例中,它将返回主电源的名称,从而产生2个名称(在本例中)。
现在我需要做的是获取每个主要
的潜艇名称所以子列表(在这种情况下将返回)
主要1的“sub 1,sub 2 and sub 3”和main 2等的“sub 1 and sub 2”......
我该怎么做?
答案 0 :(得分:2)
你在问题标题中实际上有正确的想法 - 嵌套循环,你需要在每个“main”中迭代内部subs
,如下所示:
mainlist = [];
sublist = {};
for (var i = 0; i < data.mains.length; i++) {
var obj = data.mains[i];
var mnlst = obj.name;
mainlist.push(mnlst);
var tempArr = [];
for(var j = 0; j < obj.subs.length ; j++){
var subObj = obj.subs[j];
var sblst = subObj.name;
tempArr.push(sblst);
}
sublist[mnlst] = tempArr;
}
我已将sublist
更改为Object并将“subs”放入temp数组中,然后将它们插入sublist
作为keyd数组(其中键是主名称)您可以像sublist['main 2']
一样使用它来接收所有相关的潜艇
答案 1 :(得分:2)
您可以使用另一个数据结构作为主要name
作为密钥的子列表。
var data = { "mains": [{ "id": "454", "name": "main 1", "subs": [{ "id": "32", "name": "sub 1" }, { "id": "23", "name": "sub 2" }, { "id": "54", "name": "sub 3" }], "image": null }, { "id": "654", "name": "main 2", "subs": [{ "id": "87", "name": "sub 1" }, { "id": "78", "name": "sub 2" }], "image": null }] },
mainlist = [],
sublist = Object.create(null);
data.mains.forEach(function (main) {
mainlist.push(main.name);
sublist[main.name] = main.subs.map(function (sub) {
return sub.name;
});
})
console.log(mainlist);
console.log(sublist['main 1']);
console.log(sublist);
.as-console-wrapper { max-height: 100% !important; top: 0; }
答案 2 :(得分:0)
让我们修改您的代码。
mainlist = [];
sublist = [];
for (var i = 0; i < data.mains.length; i++) {
var obj = data.mains[i];
var mnlst = obj.name;
//--[Start Modification]--
var subArr = obj.subs;
for(var j = 0; j < subArr.length; j++)
{
var subName = subArr[i].name;
//Here you have subject name, do whatever you want to do with it.
}
//--[End Modification]--
mainlist.push(mnlst);
}
console.log(mainlist);