1：ES6擴展運算符、合併多個數組
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>
</body>
<script>
let arr1 = [0, 1, 3];
let arr2 = ["a", "b", "c"];
let arr3 = ["e", "f", "g"];
let arr = [...arr1, ...arr2, ...arr3];
console.log(arr)
</script>
</html>
2：concat方法、合併多個數組
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>
</body>
<script>
let arr1 = [0, 1, 3];
let arr2 = ["a", "b", "c"];
let arr3 = ["e", "f", "g", "d"];
//let arr = [...arr1, ...arr2, ...arr3];
let arr = arr1.concat(arr2, arr3);
console.log(arr)
</script>
</html>
