Your Coding Teacher

Merkle trees, also known as binary hash trees, are a type of binary tree. hey can be used to efficiently verify the integrity of large sets of data. They are used in both blockchain and non-blockchain-related projects.

"C++ is designed to allow you to express ideas, but if you don't have ideas or don't have any clue about how to express them, C++ doesn't offer much help." - Bjarne Stroustrup

"Code is like humor. When you have to explain it, it's bad." - Cory House

Blame doesn't fix bugs

Compiler warnings are to be taken seriously Otherwise, just disable them, at your own peril.

Be a doer. Not a talker.

"I do not fear computers. I fear the lack of them." - Isaac Asimov

Deleted code is debugged code

Challenges of building distributed systems: - How to connect different networks, OS, hardware, programming languages, ... - How to extend them - How to handle security - How to scale them: algorithms, concurrency, infrastructure, ... - How to make them fail-tolerant

Ruby was created by Yukihiro Matsumoto in 1995 - Combines ideas from various other languages like Perl, Small talk, BASIC, Lisp - Ruby is most commonly found in web development - It also includes dynamic typing and garbage collection puts 'Hello, world!'

In 2003, James Strachan created Groovy as an improvement on Java It is both a static and dynamic language with features similar to those of Python, Ruby, and Smalltalk. print "Hello World!\n"

Some "real life" applications of hash tables: - Compilers symbol tables: to keep track of variables - Games: from chessboard position to what to do next - Caches - DNS: from domain to server IP - Spell checkers: from wrong spelling to list of words the user meant to type

"Those who can imagine anything, can create the impossible." - Alan Turing

Debuggers don't remove bugs

C++ developed by Bjorn Strauss up at Bell Labs in 1983 Also known as "C with classes", it's one of the most used languages. Some examples: - Adobe Photoshop - MYSQL Server - Mozilla Firefox - Gaming industry - Banking and finance applications cout<<"Hello World";

You spend many hours using your editor. Take your time to learn how to use it efficiently: - Keyboard shortcuts - Navigate to files - Search and replace based on regular expressions - Useful plugins This alone will make you much more productive, and compounds over time.

1969: What're you doing with that 2KB of RAM? Sending people to the moon 2020: What're you doing with that 1.5GB of RAM? Closing a tab in Chrome

"Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program." - Linus Torvalds

"Walking on water and developing software from a specification are easy if both are frozen." - Edward V Berard

time-of-check-to-time-of-use errors A program is vulnerable if it makes two file-based function calls where the 2nd call depends on the results of the 1st call. Since the two calls are not atomic, the file can change between calls. This is an example of race condition.