Your Coding Teacher

JavaScript has a single type for numbers, represented as 64-bit floating point Integers are also represented using this same type

"Great things are not done by impulse, but by a series of small things brought together." - Vincent van Gogh

"The code you write makes you a programmer. The code you delete makes you a good one. The code you don't have to write makes you a great one." - Mario Fusco

I know a joke about UDP but I don't know if you would get it

Science is a differential equation Religion is a boundary condition - Alan Turing

Even "simple" things, like synchronizing clocks in different nodes in a distributed system, is more complex that it seems. Distributed systems are the quantum mechanics of software design.

GCP vs AWS terminology - Both use Region as a group of data centers close to one another - Zone vs Availability Zone: individual data centers. Several per region - Points Of Presence: Both use them to provide CDN services in a similar way

Lines of code are only worth counting when you're deleting them

Tip for interviews in Python: To iterate over a list and also know the index of the current item, use enumerate for idx, val in enumerate(my_array): do_something(idx) ... You can supply a second parameter to enumerate to specify the number from (defaults to zero)

"How do we convince people that in programming simplicity and clarity —in short: what mathematicians call "elegance"— are not a dispensable luxury, but a crucial matter that decides between success and failure?" - Edsger W. Dijkstra

3 JavaScript interview questions What's the difference between == and ===? How to evaluate multiple expressions in one line? What is Functional Programming and what are the features of JavaScript that makes it a candidate as a functional language?

"Good" today is usually better than "perfect" tomorrow

"In my experience, one of the most significant problems in software development is assuming. If you assume a method will passed the right parameter value, the method will fail." - Paul M. Duvall

What happens when you run ls in your terminal? The shell calls fork() to create a copy of the shell process This copy calls exec(ls) to run ls This is how new processes are created fork and exec are system calls - ways for your programs to interact with the kernel

Some important root subdirectories in a tweet - /media: mount removable media - /mnt: user temp mounting - /sys: contains device & system info - /sbin: system executables - /tmp: temporary files - /usr: the bulk of the Linux system - /var: programs save runtime info here

A service mesh is a configurable framework that allowa you to connect, control, observe and secure microservices. It removes these responsabilities from you application logic, delegating them to the service mesh.

Lisp (LISt Processing language) was developed at MIT in 1959 Lisp is considered the first functional programming language and was extensively used in artifical intelligence. (format t "Hello, World!")

UDP vs TCP in one line: TCP has higher overhead and latency, but guarantees that the messages will arrive (in the right order). Good for: - The Web - SSH - Emails UDP is "less reliable" but has lower latency. Good for - Multiplayer action games - Video calls - Streaming

I've realised I learn by doing, not by reading or taking notes. This includes writing code and writing articles where I teach what I know.

Static vs Shared libraries - Static: code from the library is copied into the binary. Larger binary size. Must recompile if library changes - Shared: library code is loaded when needed. Processes can share the same library. No need to recompile everything if library changes