APCS - 1819 - December

Monday - Friday (12/24/18 - 12/28/18)

• Winter Break

Tuesday - Thursday (12/18/18 - 12/20/18)

Agenda:

• Introduction to Recursion
  • Recursion slides
  • Recursion practice problems
    1. Write a recursive method that returns the sum of all the numbers from N down to 1: int sum(int N)
    2. Write a recursive method that prints every other letter of a string: void printSkipping(String s)
    3. Write a recursive method that returns true if a particular character is in the String: boolean findChar(char ch, String s)
• Recursion Practice Examples - We will convert the following from iterative to recursive algorithms
  1. Monte Carlo Pi
  2. Taylor Series Pi and e
  3. Looping exercises
  4. ...and more practice
• Recursion Problems (prepare to submit to repl.it)
  • public static int count(String s, String ch) - returns the number of occurrences of ch (single character string) within s
  • public static String reverse(String s) - returns the reversed String s
  • public static int reverse(int i) - returns an int that is the full digit reversal of i (e.g. 1234 -> 4321)
• Complete Activity 13

Friday (12/14/18)

Warmup:

• Complete eIMACS: Activity 7 #3

Agenda:

• Test 9 review
• Overloaded methods
  • When you have multiple methods of the same name, but different parameters (types or number of parameters)
  • Examples:
    • String's substring() method
    • Processing's rect() method
• Complete Activity 12

Wednesday (12/12/18)

Agenda:

• Are you missing any work? (check eIMACS gradebook and StudentVUE)
• Complete Lab 1 on your own time
• For-each (enhanced for) loop
  • Walk-through and examples
  • Common pitfall(s)
  • What are the advantages of a regular for loop? Disadvantages?
  • What are the advantages of a for-each/enhanced? Disadvantages?
  • When do you want to use a regular for loop vs. a for-each/enhanced for loop?
• Complete Test 9

Homework:

• Complete Lab 1: Chatter
• Complete Test 9

Monday (12/10/19)

Agenda:

• Complete Lab 1: Chatter
  • Your project will be auto-graded when you export from NetBeans and upload it to eIMACS

Homework:

• Complete Lab 1: Chatter

Thursday (12/6/18)

Agenda:

• Go over eIMACS: Test 10 homework
• main method
• Comments
• Multiple variable declarations (comma-separated)
• Complete Lab 1: Chatter (you will need NetBeans or Eclipse)

Tuesday (12/4/18)

Warmup:

• Complete #1 of eIMACS: Activity 7: Checksums

Agenda:

• Make sure you have completed all repl.it methods assignments
• Complete eIMACS: Activity 11: Strings 2
  • Use the AP CS exam quick reference card
  • All methods should be able to be completed using the methods listed in the card

Homework:

• Complete eIMACS: Activity 7 #2
• Complete eIMACS: Test 10