Your Coding Teacher

A greedy algorithm is one which makes decisions that are locally optimum and never changes them. This strategy does not always yield the optimum solution. It requires proof that it will arrive at the optimal. Example: Dijkstra's shortest path

Load balancers - Can be hardware or software (ex: in AWS and GCP) - Act at different network layers: Layer 4 vs Layer 7 - Use different routing algorithms: (Weighted) Round-Robin, (Weighted) least lonnection, etc. - Need health checks (to stop routing to unhealthy servers)

JavaScript's falsy values: - false - undefined - null - The number 0 - The number NaN - The empty string

"An ugly system is one in which there are special interfaces for everything you want to do. Unix is the opposite. It gives you the building blocks that are sufficient for doing everything. That's what having a clean design is all about." - Linus Torvalds

C# was created by Microsoft in 2000 It was designed to combine the computational ability of C++ with the simplicity of Visual Basic C# is comparable to Java. It offers strong typing, lexical scope and it's an object-oriented language Console.WriteLine("Hello World!");

StackOverflow That's it. That's the tweet.

3 Random coding tips Choose the right tools, not the ones you like the most Learn design patterns Always ask why

All problems in computer science can be solved with another level of indirection. Except for the problem of having too many layers of indirection

The best way to deliver criticism is to ask questions. People can think about the problem. If they cannot come up with a solution, then you can suggest yours. Much better than approaching them with a "you're wrong" attitude.

Learn by reverse engineering things How does your favourite service/app work? - Twitter - Netflix - Uber - Instagram - Facebook Pick some feature. Don't expect to build a perfect clone, but expect to learn a lot in the process.

Bash exercise: Read from words.txt and output the word frequency list (in reverse sorted order) to stdout. tr -s ' ' '\n' < words.txt | sort | uniq --count | sort -r | awk '{print $2 " " $1}'

"When debugging novices insert corrective code. Experts remove defective code." - Richard Pattis

The best thing about being a developer is that you can work from anywhere at anytime The worst thing about being a developer is that you can work from anywhere at anytime

Programmers are good at finding valid reasons for making poor decisions

There are 6 basic types of values in JavaScript - numbers (64 bits) - strings - Booleans - objects - functions - undefined values

"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies and the other way is to make it so complicated that there are no obvious deficiencies." —C.A.R. Hoare, The 1980 ACM Turing Award Lecture

"Program testing can be a very effective way to show the presence of bugs, but is hopelessly inadequate for showing their absence." - Edsger Dijkstra

You: "I just coded a real masterpiece! Only I and God two know how it works." Also you, 3 months later: "Now only God knows."

Will we see the day where software is legistated? Politicians deciding: - What coding languages we can use - What platforms to write on - What courses we have to take - What books to read

There is nothing as permanent as a quick fix