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Enumerator object expected

You attempted to invoke the Enumerator.prototype.atEnd, Enumerator.prototype.item, Enumerator.prototype.moveFirst, or Enumerator.prototype.moveNext method on an object of a type other than Enumerator. The object of this type of invocation must be of type Enumerator. Here is an example of code that breaks this rule:

var o = new Object;
o.f = Enumerator.prototype.atEnd;
o.f();

To correct this error

  • Only invoke the Enumerator.prototype.atEnd, Enumerator.prototype.item, Enumerator.prototype.moveFirst, or Enumerator.prototype.moveNext methods on objects of type Enumerator. To find out if your object is an Enumerator object, use:

    if(x instanceof Enumerator)
    
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