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.
Dechallenge = withdraw of drug â¢ resolution of suspected ADR when the drug is withdrawn is a strong, although not conclusive indication of drug-induced disease. â¢ In cases where a withdrawal reaction is experienced, a dechallenge is when the drug is again given to the patient. â¢ âPositiveâ dechallenge = improvement of reaction when dechallenge occurs Rechallenge = reintroducing the drug after a dechallenge. â¢ this is only justifiable when the benefit of re-introducing the drug to the patient outweighs the risk of recurrence of the reaction.