js object create key code example
Example 1: javascript object as key
var fighters = new WeakMap();
var bruce = {name: 'Bruce Lee'};
var chuck = {name: 'Chuck Norris'};
fighters.set(bruce, 'Jeet Kune Do');
fighters.set(chuck, 'Karate');
console.log(fighters.get(bruce));
console.log(fighters.get(chuck));
Example 2: js create object with keys
var users = [{userId: "1", name: 'harald'}, {userId: "2", name: 'jamie'}];
var obj = {};
users.forEach(user => {
obj = {
...obj,
[user.userId]: user,
}
})
console.log(obj)