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如果某參數的列只有一個參數，那麼each是失敗，請看下面的例子
Java代碼:
<!DOCTYPE html>
<html>
<head>
<style>
p { margin: 8px; font-size:16px; }
.selected { color:red; }
.highlight { background:yellow; }
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
Hello
and
Goodbye
script配合style一起實現在script修改樣式。
<script>
var pp=3;
var a=[pp];
alert(a);
$.each(pp,function(i,n){
alert(i);
});
</script>
</body>
</html>
結果是第一次alert是3，第二次沒有alert,說明pp不是數組，dom,jason等。
如何保證pp嚴格是數組呢，很簡單var a=[pp];這一句就行了，下面我們把each裡面的pp換成a,則結果是3,0,正確。注意這個中括弧把pp轉換成了數組。
Java代碼:
<!DOCTYPE html>
<html>
<head>
<style>
p { margin: 8px; font-size:16px; }
.selected { color:red; }
.highlight { background:yellow; }
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
Hello
and
Goodbye
script配合style一起實現在script修改樣式。
<script>
var pp=3;
var a=[pp];
alert(a);
$.each(a,function(i,n){
alert(i);
});
</script>
</body>
</html>
總結:當參數個數小於2時，要嚴格保證參數列為數組，嚴格每個都執行each操作，則需要對參數列長度是否大於2進行分別對待。
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