Welcome to CompSci.rocks

How video games affect your brain

Great TED talk about how playing video games affects your brain. It's probably not what you think.

Rocketbook QR Codes

A few weeks ago I spent some time trying to decode the Rocketbook QR codes. Didn't have much luck, but here's what I've found so far.

Lightboard Solution

Lightboard from the 2019 CompSci AP-A FRQ has you working with a 2d-array.

Delimiters Solution

Delimiters is a problem where you're working with an ArrayList of strings.

2019 AP FRQ Solutions

In 2019 the CompSci AP-A exam had you solve the FRQs APCalendar, Delimiters, Light Board, and Step Tracker.

StepTracker Solution

StepTracker has you implement a full class from scratch

AP Calendar FRQ Solution

AP Calendar has you working with an arbitrary class and dates

Sound FRQ Solution

For the Sound FRQ you're working with a one dimensional array of integers

Climb Solution

The Climb FRQ has you working with a ArrayList of objects

Horse Barn Solution

The Horse Barn FRQ has you working with a ArrayList of objects and interfaces

Download Info Solution

Download Info has you implement a solution using an ArrayList of an arbitrary class

Operator Precedence

We all learned PEMDAS in school, but the order of operations in Java is way more detailed.