JavaScript 怎么判断一个变量类型是否为数组？谢谢！

[winder]

JavaScript 怎么判断一个变量类型是否为数组？谢谢！

[hbhbhbhbhb1021]

<script language=javascript>
var a=new Array(1,2,3)
alert(a.constructor);
</script>

[clare2003]

使用函数typeof
typeof 返回六种可能的值：“数字类型”、“字符串类型”、“布尔型”、“对象类型”、“函数类型”和“未定义类型”。
数组为认为一种object类型

<script language=javascript>
var a=new Array(1,2,3);
var b=2;
var c="2eee";

document.write(" The type of is " + typeof(a) );
document.write(" The type of is " + typeof(b) );
document.write(" The type of is " + typeof(c) );
alert(a.length);

</script>

[mingxuan3000]

function func1(a){
if(a!=null){
if(a.length){
alert("array";
}else{
alert("is not array")
}
}
}

[clare2003]

var a="2eee";

调用
function func1(a){
if(a!=null){
if(a.length){
alert("array";
}else{
alert("is not array")
}
}
}
出来的结果是"array"
--------------------------




<script>
var a=new Array(1,2,3);
var b=2;
var c="2eee";

document.write(" The type of is " + typeof(a) );
document.write(" The type of is " + typeof(b) );
document.write(" The type of is " + typeof(c) );
//alert(a.length);

if(c!=null){
if(c.length){
alert("array");
}else{
alert("is not array")
}


}
</script>

[mingxuan3000]

哦，我那个只能判断obiect和obiect array

[winder]

谢谢！