每日一练19：合并两个数组的n种办法

 var ar1 = ['A1', 'A2', 'B1', 'B2', 'C1', 'C2', 'D1', 'D2'],
            ar2 = ['A', 'B', 'C', 'D'];

1：concat

console.log(ar1.concat(ar2));

2：apply

ar1.push.apply(ar1,ar2);
        console.log(ar1);

3：call

 ar1.push.call(ar1,...ar2);
        console.log(ar1);

4：push

 ar1.push(...ar2);
        console.log(ar1);

5：Array.prototype.push.apply

    Array.prototype.push.apply(ar1,ar2);
           console.log(ar1);

6： Array.prototype.push.call

 Array.prototype.push.call(ar1, ...ar2);
        console.log(ar1);

参考 Array.prototype.push()、合并两个数组的方法

来源：CSDN

作者：崧哥的编程之路

链接：https://blog.csdn.net/weixin_41406727/article/details/103601447