JavaScript中的Object.assign（object1 [i]）

Question

假設object1有10個對象。 並且此代碼將object1分配給object2

const object2 = Object.assign(object1);

但是我只想使用for循環從object1分配5個對象。

for (let i = 0; i < 5; i++) {
    object2 = Object.assign(object1[i]);
}
// but this one won't work.

有任何想法嗎？

Answer 1

1. 我假設obj1和obj2都是數組

 var obj1 = [] for (let i=0; i< 10; i++) { obj1.push({key: i}); } var obj2 = [] for (let i=0; i< 5; i++) { obj2.push(obj1[i]); } 

2. 我假設您正在學習Object.assign() 。 用於將原始對象克隆或修改為目標對象

  var obj1 = {key:1, foo: 'bar'}; var obj2 = Object.assign({}, obj1); //clone all properties var obj3 = Object.assign({foo: 'not bar', newprop: 'anything'}, obj1); //copy the original, modify `foo` property and add `newprop` //you can iterate through properties with this for (var property in obj3) { if (obj3.hasOwnProperty(property)) { // do stuff, may be filter which property you want to get, etc } }