js对象合并的4种方式与数组合并的4种方式

let obj1 = {
    name: '陈伟停',
    gender: '男',
    hobby: '唱歌'
};
let obj2 = {
    name: '陈伟停',
    gender: '男',
    hobby: '跳舞',
    nationality: '中国'
};
 
let obj = {...obj1, ...obj2};
console.log(obj);  // { name: '陈伟停', gender: '男', hobby: '跳舞', nationality: '中国' }

let obj = Object.assign({}, obj1, obj2);
console.log(obj);  // { name: '陈伟停', gender: '男', hobby: '跳舞', nationality: '中国' }

let obj = obj1;
for (var p in obj2){
    if(obj2.hasOwnProperty(p))
    obj[p] = obj2[p];
}
console.log(obj);  // { name: '陈伟停', gender: '男', hobby: '跳舞', nationality: '中国' }

$.extend(obj1, obj2)  // 浅拷贝
$.extend(true, obj1, obj2)  // 深拷贝

var newArray = [...array,...elements]
console.log(newArray); // ["a", "b", 0, 1, 2]

var array = ["a", "b"];
var elements = [0, 1, 2];
 
var newArray = array.concat(elements);
console.log(array); //['a', 'b']
console.log(newArray);// ["a", "b", 0, 1, 2]

var array = ["a", "b"];
var elements = [0, 1, 2];
array.push.apply(array, elements);
console.log(array); // ["a", "b", 0, 1, 2]

const heroes = ['Batman'];
 
heroes.push('Superman');
 
heroes; // ['Batman', 'Superman']
const heroes = ['Batman', 'Superman'];
const villains = ['Joker', 'Bane'];
 
heroes.push(...villains);
 
heroes; // ['Batman', 'Superman', 'Joker', 'Bane']