What allows a programmer to write code quickly and efficiently

you can only change it if your real name or personal information was in it. and if so you would need to contact them directly with a username change request.

i've had the same problem. i generally just ignore it, as a ton of these "verified answers" are completely wrong.

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.