Javascript 避免循环内的循环
我想知道是否有任何方法可以避免循环中的循环,例如:Javascript 避免循环内的循环,javascript,node.js,Javascript,Node.js,我想知道是否有任何方法可以避免循环中的循环,例如: let underscore = require('underscore'); _.each(obj, (val, key) => { _.each(key, (val, key) => { _.each(key, (val, key) => { // Finally i have access to the value that i need }); }); }); 我正在处理一个复
let underscore = require('underscore');
_.each(obj, (val, key) => {
_.each(key, (val, key) => {
_.each(key, (val, key) => {
// Finally i have access to the value that i need
});
});
});
我正在处理一个复杂的MAP对象,它的内部有贴图和数组。很明显,我无法更换这些回路。。但我想知道我是否可以更改代码以使其更清晰
谢谢。是的,您可以用比这里更干净的方式分解代码,以避免嵌套循环。假设你有一个这样的结构:
// lets invent some hash of people, where each person
// has an array of friends which are also objects
var people = {
david: { friends: [{name:'mary'}, {name:'bob'}, {name:'joe'}] },
mary: { friends: [{name:'bob'}, {name:'joe'}] }
};
function eatFriendBecauseImAZombie(myName, friendName) {
console.log(myName + ' just ate ' + friendName + '!!');
}
// (inner loop 2) how to parse a friend
function parseFriend(myName, friend) {
eatFriendBecauseImAZombie(myName, friend.name);
}
// (inner loop 1) how to parse a person
function parsePerson(name, info) {
_.each(info.friends, (val) => parseFriend(name, val));
}
// (outer loop) loop over people
_.each(people, (val, key) => parsePerson(key, val));
输出为:
david just ate mary!!
david just ate bob!!
david just ate joe!!
mary just ate bob!!
mary just ate joe!!
是的,有办法。@squint从技术上讲,你已经回答了这个问题…@squint,还有其他办法too@kapetanios那是一个恶毒的谣言@见鬼,甚至还有更好的方法…