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.
Refinancing is the process of obtaining a new mortgage in an effort to reduce monthly payments, lower your interest rates, take cash out of your home for large purchases, or change mortgage companies.hat You Should Know Before Refinancing. Getting a new mortgage to replace the original is called refinancing. Refinancing is done to allow a borrower to obtain a different, and even better interest term and rate.