I knew nothing about programming before this course. But in my exception, programming is a really cool stuff. It has the ability to make a code run which forms a completed application in the end. So far I have learned the foundational using of DrRacket which can do mathematics quickly or do other things like changing the size of a picture with simple commands. It is interesting to predict the steps and final answers of a command. If my answer is the same as DrRacket says, I feel that I have less distance with programming. Actually this course is much easier than I expected. When I heard about computer science, I image that the course may ask me to make an app by myself as an assignment. Also it is easy to prepare for quizzes. It is not hard to comprehend a week's lecture thorough a review, especially the time I working on the weekly lab. I only need to follow the instructions and watch the result. After several tries, I think I am pretty confident about the stuff which will be quizzed.
This week is midterm test which I also learn new stuffs from the review. Last week we learned about list,apply, map and range. The idea about range is a little bit confused because the end number is not included in the list. In addition, I cannot understand map at the first time because it looks complicated. However, when I think it as math, it turns out really easy. Also I know something about rotate from the past test. A positive number is ccw and if I want to rotate cw, it should be a negative number. About define and check-expect, most of my friends think they are hard but I am not. I just need to copy down some part and change it into the new function.
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