在我的应用程序中，我从服务器返回了如下数据。它具有非常深的嵌套：
var data = [{
name: "root",
children: [{
name: "Parent1",
children: [{
name: "Parent1-child1",
children: [{
name: "Parent1-child1-grandchild1",
children: [{
name: "Parent1-child1-grandchild1-last",
children:[]
}]
},
{
name: "Parent1-child1-grandchild2",
children: []
},
{
name: "Parent1-child1-grandchild3",
children: []
}
]
},
{
name: "Paren1-child2",
children: [{
name: "Parent1-chil2-grandchild1",
children: []
},
{
name: "Parent1-child2-grandchild2",
children: [{
name: "Parent1-child2-grandchild2-last",
children: []
}]
},
{
name: "Parent1-child2-grandchild3",
children: []
}
]
},
{
name: "Parent1-child3",
children: []
}
]
},
{
name: "Parent2",
children: [{
name: "Parent2-child1",
children: []
},
{
name: "Parent2-child2",
children: [{
name: "Parent2-child2-grandchild1",
children: []
},
{
name: "Parent2-child2-grandchild2",
children: [{
name: "Parent2-child2-grandchild2-last",
children: []
}]
}
]
}
]
},
{
name: "Parent3",
children: []
}
]
}];
要求是遍历所有对象（也为深层嵌套层），如果children属性的值为空数组，则删除该对象。所以输出应该像下面这样
var data = [{
name: "root",
children: [{
name: "Parent1",
children: [{
name: "Parent1-child1",
children: [{
name: "Parent1-child1-grandchild1",
children: []
},
]
},
{
name: "Paren1-child2",
children: [
{
name: "Parent1-child2-grandchild2",
children: []
},
]
},
]
},
{
name: "Parent2",
children: [
{
name: "Parent2-child2",
children: [
{
name: "Parent2-child2-grandchild2",
children: []
}
]
}
]
}
]
}];
我已经尝试了以下代码，但是无法正常工作。请让我知道如何达到预期的结果。
function checkChildrens(arr) {
arr.forEach((ele,i) => {
if(ele.hasOwnProperty('children')) {
checkChildrens(ele['children'])
} else {
arr.splice(i,1)
}
})
}
checkChildrens(data);
在这种情况下，我也尝试过使用filter方法。它无法正常工作。
arr.filter((ele,i)=>{
if(ele.hasOwnProperty('children') && ele.children.length !== 0 ){
removeEmpty(ele.children)
}else{
return false;
}
return true;
})
您可以通过检查子数组的长度来重建新对象。
function filter(array) {
return array.reduce((r, o) => {
if (o.children && o.children.length) {
r.push(Object.assign({}, o, { children: filter(o.children) }));
}
return r;
}, []);
}
var data = [{ name: "root", children: [{ name: "Parent1", children: [{ name: "Parent1-child1", children: [{ name: "Parent1-child1-grandchild1", children: [{ name: "Parent1-child1-grandchild1-last", children: [] }] }, { name: "Parent1-child1-grandchild2", children: [] }, { name: "Parent1-child1-grandchild3", children: [] }] }, { name: "Paren1-child2", children: [{ name: "Parent1-chil2-grandchild1", children: [] }, { name: "Parent1-child2-grandchild2", children: [{ name: "Parent1-child2-grandchild2-last", children: [] }] }, { name: "Parent1-child2-grandchild3", children: [] }] }, { name: "Parent1-child3", children: [] }] }, { name: "Parent2", children: [{ name: "Parent2-child1", children: [] }, { name: "Parent2-child2", children: [{ name: "Parent2-child2-grandchild1", children: [] }, { name: "Parent2-child2-grandchild2", children: [{ name: "Parent2-child2-grandchild2-last", children: [] }] }] }] }, { name: "Parent3", children: [] }] }],
result = filter(data);
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }删除所有嵌套的空子级的方法（最后一个子级除外。该子级有一个空对象，但没有子级属性）。
function filter(array) {
return array.reduce((r, o) => {
if (o.children) {
var children = filter(o.children);
if (children.length) r.push(Object.assign({}, o, { children }));
} else {
r.push(o);
}
return r;
}, []);
}
var data = [{ name: "root", children: [{ name: "Parent1", children: [{ name: "Parent1-child1", children: [{ name: "Parent1-child1-grandchild1", children: [{ name: "Parent1-child1-grandchild1-last", children: [] }] }, { name: "Parent1-child1-grandchild2", children: [] }, { name: "Parent1-child1-grandchild3", children: [] }] }, { name: "Paren1-child2", children: [{ name: "Parent1-chil2-grandchild1", children: [] }, { name: "Parent1-child2-grandchild2", children: [{ name: "Parent1-child2-grandchild2-last", children: [] }] }, { name: "Parent1-child2-grandchild3", children: [] }] }, { name: "Parent1-child3", children: [] }] }, { name: "Parent2", children: [{ name: "Parent2-child1", children: [] }, { name: "Parent2-child2", children: [{ name: "Parent2-child2-grandchild1", children: [] }, { name: "Parent2-child2-grandchild2", children: [{ name: "Parent2-child2-grandchild2-last", children: [] }] }] }] }, { name: "Parent3", children: [{}] }] }],
result = filter(data);
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }本文收集自互联网，转载请注明来源。
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