SOURCE

function jspang(...arg) {
  console.log(arg[0]);
  console.log(arg[1]);
  console.log(arg[2]);
  console.log(arg[3]);
}

jspang(1, 2, 3);

let arr1 = ["www", "jspang", "com"];
// let arr2 = arr1;
let arr2 = [...arr1];
console.log(arr2);
arr2.push("shengHongYu");
console.log(arr2);
console.log(arr1);

function jsp(first, ...arg) {
  for (let val of arg) {
    console.log(val);
  }
}

jsp(0, 1, 2, 3, 4, 5, 6, 7);