1.递归遍历查找特定key值(ie9以下不支持forEach)
原文http://www.cnblogs.com/ae6623/p/5938560.html
var obj = {
first: "1",
second: {
name: "abc",
mykey: "2",
third: {
age: "30",
mykey: "3"
}
},
forth: "4",
mykey: "5"
};
console.log(getMykey(obj, []));
function getMykey(obj, mykeyValues) {
//没有则跳出
if (!obj["mykey"]) {
return mykeyValues;
} else {
//有就放入
mykeyValues.push(obj["mykey"]);
//再次递归
var keys = Object.keys(obj);
keys.forEach(function(i) {
getMykey(obj[i], mykeyValues);
});
}
return mykeyValues;
}
2.递归遍历输出key
参考http://www.jb51.net/article/86607.htm
要求输出嵌套json对象的key name
LG: var tree = {node1:{node2:"",node3:{node4:""}}}
Print: ["node1","node2","node3","node4"]
答案：
var arr=[];
function printTree(tree){
for(var i in tree){
arr.push(i);
typeof tree[i]=='object'?printTree(tree[i]):'';
};
}(tree);
console.log(arr);
var obj ={first:"1",second:{name:"abc",mykey:"2",third:{age:"30",mykey:"3"}},forth:"4",mykey:"5"};console.log(getMykey(obj, []));functiongetMykey(obj, mykeyValues) {//没有则跳出if (!obj["mykey"]) {return mykeyValues;}else{//有就放入mykeyValues.push(obj["mykey"]);//再次递归var keys =Object.keys(obj);keys.forEach(function(i) {getMykey(obj[i], mykeyValues);});}return mykeyValues;}