You can code all week if you want to. Apple is doubling down on its commitment to Hour of Code, expanding what was originally a single day devoted to hour-long coding classes in its 487 retail stores around the world to a full week of training opportunities. The expansion aligns with Computer Science Week on Dec. 5-11. This is the fourth year of Apple’s partnership with the non-profit organization Code.org. While the opportunity to learn the fundamentals of computer programming is expanding to a full week, each session is still an hour and, according to Apple, the popular program books up soon after registration opens. Registration for this year’s hour of code opened on Thursday.