// 1.数组拼接 concat() var a = [1, 2]; var b = [3, 4]; console.log(a.concat(b)); // [1, 2, 3, 4] // 2.数组翻转 reverse() var a = [1, 2, 3]; console.log(a.reverse()); // [3, 2, 1] // 3.数组分割 slice() var a = [1, 2, 3, 4]; console.log(a.slice(1, 3)); // [2, 3] /…