在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(cainiaoplay.com)</title>
<style>div { color:blue; }
	p { color:green; margin:0; }
	span { color:red; }
</style>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>

<div></div>
<p></p>
<span></span>
<script>
$(function () { 
	var arr = [ "a", "b", "c", "d", "e" ];
	$("div").text(arr.join(", "));
	arr = $.map(arr, function(n, i){
		return (n.toUpperCase() + i);
	});
	$("p").text(arr.join(", "));
	arr = $.map(arr, function (a) {
		return a + a;
	});
	$("span").text(arr.join(", "));
})
</script>
 
</body>
</html>
源代码

动行结果
