typeof operator on Array variable gets 'object'

[predamarcel]

I have a javascript function in which one of the parameters SHOULD BE Array, not other Object.

In case if it is not an array I shoud do a quick return,
but I can not figure how to make the difference between the Array type and other Object type.
That because typeof var_array is object

Any ideas ?

___

http://marcel.4x4.ro/

____

 

[predamarcel]

Hi,

finnaly I've solved it.
I have write a function, myabe someone else will need it too, so I'll post the code here:

// return the Object Type
function getObjectType(obj)
{
        if ( typeof obj != 'object')
        {
                return typeof obj; // Not An Object

        };
        // if not constructor  return the  typeof obj
        if (obj.constructor == undefined)
        {
                return typeof obj;
        };

        var str = obj.constructor.toString();
        // Objects which has constructor
        str = str.split('function').join('');
        str = str.split('(');
        str = str[0];
        // trim the white spaces, ussing regexp
        re = /\s/g;
        new_str= str.replace(re,'');
        return new_str;
}

Looks like it works pretty cool, at least on FireFox 1.0 and IE 6.0

function myObj(x)
{
        this.property_x = x;
};
alert(getObjectType(1234));     // alerts 'number'
alert(getObjectType('abc'));    // alerts 'string'
my = new myObj('abc');
alert(getObjectType(my));       // alerts 'myObj'
alert(getObjectType(new Array("a", "b")));      // alerts 'Array'

___

http://marcel.4x4.ro/

____

 

[adam0101]

Maybe this will help:

function getType(obj){
  return typeof(obj)=='object' ? obj.constructor==Array ? 'array' : 'object' : typeof(obj);
}

Adam

 

[adam0101]

Actually, here it is a little more trimmed up:

function getType(obj){
  return obj.constructor==Array?'array':typeof(obj);
}

Adam