The reason is because you only set up your array to hold 3 items. When you typed a 3 instead of a 2 you were trying to access item number 4 (0 to 3, remember). But you haven't defined a fourth item. Even though you haven't got a fourth item, Javascript doesn't throw you up an error, it doesn't refuse to work.
Refactoring. Refactoring is the process of clarifying and simplifying the design of existing code, without changing its behavior.Agile teams are maintaining and extending their code a lot from iteration to iteration, and without continuous refactoring, this is hard to do. This is because un-refactored code tends to rot.efactoring is the process of clarifying and simplifying the design of existing code, without changing its behavior. Agile teams are maintaining and extending their code a lot from iteration to iteration, and without continuous refactoring, this is hard to do.
Accurizing is the process of improving the accuracy of a firearm or airgun. For firearms, accuracy is defined as the ability to hit exactly what one is aiming at. Further, accuracy and precision, or the ability to hit the same place over and over again in a repeatable fashion, are the goals of accurizing.ccurizing is the process of improving the accuracy of a firearm or airgun. For firearms, accuracy is defined as the ability to hit exactly what one is aiming at. Further, accuracy and precision, or the ability to hit the same place over and over again in a repeatable fashion, are the goals of accurizing.