JavaScript Enumerator Items can be read using JavaScript for loop along with its supported methods to move the pointer position. In the previous tutorial we discussed about the JavaScript Enumerator object and its methods such as moveFirst(), item(), atEnd() and moveNext(). These methods enable you to read each item stored in the enumeration and move the pointer to the next position. atEnd() method returns the condition testing result as true if the pointer position is last item so that for loop exits after reading the last item value. moveFirst() method sets back the pointer position of JavaScript Enumerator to the first item in the collection. moveNext() method moves the pointer to the next item after each iteration.
Reading Enumerator Items
var myArray = new Array("sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday");
var collection = new Enumerator(myArray);
for (collection.moveFirst(); !collection.atEnd(); collection.moveNext()) {
document.write(collection.item() + "<br />");
}
In the above JavaScript example collection.moveFirst() method has been used to initialize the pointer position of Enumerator. At the place of for loop condition test section collection.atEnd() method has been used that directs to exit the for loop when it returns true. collection.moveNext() has been used to increment the pointer position. Inside the JavaScript for loop iteration code block collection.item() method has been used that returns the item at the current pointer position.
