Chapter 3 Daily 02

1. (hd) Write a helper function take in a single integer between 0 and 15 (inclusive) and return a string containing the corresponding hexadecimal digit. The digits are 10=“A”, 11=“B”, etc.

    "B" == hd 11
   

2. (hexShow) Take in a list of values of hexadecimal digits (so integers, like [10,11]. Output a string with the hex number “AB”.

    "F00D" == hexShow [15,0,0,13]
   

3. (hexDec) Input a list of values of hexadecimal digits, like [15,0,0,13] and output the value of the actual number.

    61453 == hexDec [15,0,0,13]
   

   Each number represents the decimal value of a base 16 digit:

    15*16^3 + 0*16^2 + 0*16^1 + 13*16^0
   

4. Later we will write hexParse :: String -> [Int] to produce a the list of values of hexadecimal digits.

    [15,0,0,13] == hexParse "F00D"