Lecture 14 - Exercises

14A - String Methods

1. What do each of the following expressions evaluate to?

   1. "Wow".replace("W", "t").upper()
   2. "banana".find("a")
   3. " O_O ".strip().replace("_", "-")
   4. "banana".count("a")

2. Write a single expression that evaluates to the number of occurrences of the letter “E”, regardless of case, in a string s.

14B - String Comparisons and Ordering

3. Evaluate the following expressions:

   1. "To be or not to be".find("be") == 4
   2. "Boo".replace("o", "O").lower() <= "boo"
   3. "no" in "To be or not to be"
   4. "stark" not in "Tony Stark"
   5. "bat" > "rat"
   6. "tap" < "bear"
   7. "Jam" < "bet"
   8. "STEAM" > "STEP!"

4. What does the following program print?

   def sub_lt(s):
       count = 0
       for i in range(len(s)):
           if s[i:] < s:
               count += 1
       return count
   
   print(sub_lt("brambleFork"))