Enumerator Object (JavaScript)

enumObj

Required. The variable name to which the Enumerator object is assigned.

collection

Optional. Any Collection object.

Collections differ from arrays in that the members of a collection are not directly accessible. Instead of using indexes, as you would with arrays, you can move the current item pointer only to the first or next element of a collection.

The Enumerator object provides a way to access any member of a collection and behaves similarly to the For...Each statement in VBScript.

The following code shows the usage of the Enumerator object:

var bytesPerGB = 1024 * 1024 * 1024;

var fso = new ActiveXObject("Scripting.FileSystemObject");

document.write(fso.Drives);
var e = new Enumerator(fso.Drives);

var driveString = "";

e.moveFirst();
while (e.atEnd() == false)
{
    var drv = e.item();

    driveString += drv.Path + " - ";

    if (drv.IsReady){
        var freeGB = drv.FreeSpace / bytesPerGB;
        var totalGB = drv.TotalSize / bytesPerGB;

        driveString += freeGB.toFixed(3) + " GB free of ";
        driveString += totalGB.toFixed(3) + " GB";
    }
    else{
        driveString += "Not Ready";
    }

    driveString += "<br />";;

    e.moveNext();
}
document.write(driveString);

// Output: <drive information

The Enumerator object has no properties.

atEnd Method | item Method | moveFirst Method | moveNext Method

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, and Internet Explorer 10 standards. Not supported in Windows Store apps. See Version Information.

Reference