<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>for/in循環</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
function f() {
var days=["Monday","Tuesday","Wednesday","Thursday","Friday"];
for(var idx in days){
document.write("it is "+days[idx]+"<br>");
// document.write("it is "+idx+"<br>");
}
}
</script>
</head>
<body onload="f()">
</body>
</html>
【匯智學堂】for/in循環(JS基礎入門之六)
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