So far I just realized that I forget to write week 2 blogger since I forget to save and forget to post it on the blogger :( although I did try to think about what I learned during that week, by reviewing quiz and class notes, I noticed I start to learn what is recursion however it looks like really easy right now, and some code like apply plus or times list numbers， by the way I really found this stuff are really easy right now.
As the final exam coming soon, I start becoming little busy in computer science than before, however, during this week, I still working on the recursion to preparing for the quiz tomorrow, and start to realize what is flatten doing the DR.Racket. Also I did some review for how to writing check-expect for some program. However, I forget how to a tiny bit about the triangle recursion:( Flatten is one of the biggest problem I've been met since I join in the class.
