Diana's first blog for csc104

How to use range? I have an example here, (range 0 4 1) This function means counts from 0 to 4 but not including 4, the range is 1. The answer is (list 0 1 2 3) Obviously the first and second number give me a limit and the third number is the range. We should all noticed that the second number doesn’t count in the answer.

How to use map? For example, I have a function (map string-length (list “cat” “dog” “fish” “banana”)) I simply do (list (string-length “cat”) (string-length “dog”) (string-length “fish”) (string-length “banana”)) The answer will be (list 3 3 4 6) This is how we use map, we bring all the listed elements into the function and return a new list. How to use apply? For example, I have a function, (apply string-append (list “cat” “dog” “fish” “banana”)) I simply do (apply string-append   “cat” “dog” “fish” “banana”) The answer will be (catdogfishbanana) This is how we use apply, we bring all the elements into one function and return it together.