towwa

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

1. Run Software Update

Make sure everything is up to date in the App Store

2. Install Homebrew

Open a terminal window and execute the Homebrew install script:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Competitive Programming Syllabus

Geometry

Graham Scan algorithm for Convex Hull O(n * log(n))
Online construction of 3-D convex hull in O(n^2)
Bentley Ottmann algorithm to list all intersection points of n line segments in O((n + I) * logn)
- Suggested Reading - http://softsurfer.com/Archive/algorithm_0108/algorithm_0108.htm
Rotating Calipers Technique
- Suggested Reading - http://cgm.cs.mcgill.ca/~orm/rotcal.html

Problems - Refer the article for a list of problems which can be solved using Rotating Calipers technique.

Project Ideas

Ok. I'm going to list off some ideas for projects. You will have to determine if any particular idea is good enough to include in a portfolio. These aren't creative ideas. They likely already exist. Some are way too advanced while others are simplistic.

I will recommend to post any project you make to github and make a github project page for it. Explain in as much detail as possible how you made it, how it can be improved etc. Document it.

If you pick an advanced idea, setup a development roadmap and follow it. This will show some project management skills.

Another piece of advice for those who are design challenged. Use different front end frameworks and use different themes for those frameworks to provide appealing designs without looking like yet another bootstrap site.

Install iTerm2 from https://www.iterm2.com/
Install oh-my-zsh from https://ohmyz.sh/ or https://github.com/robbyrussell/oh-my-zsh
Set iTerm2 theme tab theme to Dark - Preferences | Appearance | Tabs | Theme > Dark
Install Fira Code fonts from https://github.com/tonsky/FiraCode (Clone and navigate to dstr > ttf, install all font files by double clicking)
Install Powerline fonts from https://github.com/powerline/fonts
Set fonts for iTerm2 - Preferences | Profiles | Text
- Change Font to 14pt Fira code regular and Check Use Ligatures checkbox
- Change Non ASCII Font to 14pt Fira mono and Check Use Ligatures checkbox
Install iTerm2 snazzy theme from https://github.com/sindresorhus/iterm2-snazzy
- Navigate to Preferences | Profiles | Color Presets > Snazzy

Learning Rust

The following is a list of resources for learning Rust as well as tips and tricks for learning the language faster.

Warning

Rust is not C or C++ so the way your accustomed to do things in those languages might not work in Rust. The best way to learn Rust is to embrace its best practices and see where that takes you.

The generally recommended path is to start by reading the books, and doing small coding exercises until the rules around borrow checking become intuitive. Once this happens, then you can expand to more real world projects. If you find yourself struggling hard with the borrow checker, seek help. It very well could be that you're trying to solve your problem in a way that goes against how Rust wants you to work.

Arch + i3-gaps Install Guide

First set up your keyboard layout. For example, in Spanish:

   # loadkeys es

For a list of all acceptable keymaps:

   # localectl list-keymaps

Best VTuber software

This is a list of the most commonly used and relevant vtubing software. The "best" will always be subjective and depend on your specific requirements. Overall, the information in this list is as accurate as I could figure it out, but there might be errors or some details might become out of date. If you find anything that needs to be corrected, please let me know. You can also note it in a comment.

Additional explanations:

iPhone means that an iPhone is basically required
iFacialMocap support means that tracking data can be received from the iFacialMocap iPhone app
VMC protocol means that the application can send and/or receive tracking data from other VMC protocol capable applications, allowing the combination of multiple tracking methods (e.g. VSeeFace receiving VR tracking from Virtual Motion Capture and iPhone/ARKit face tracking from Waidayo)
Tobii means that the Tobii eye tracker is supported

	AXIS_UP ignore
	AXIS_DOWN ignore
	AXIS_LEFT ignore
	AXIS_RIGHT ignore
	MOUSE_BTN3 add volume 5
	MOUSE_BTN4 add volume -5
	MOUSE_BTN5 seek -5
	MOUSE_BTN6 seek 5

	/*
	This a header file that includes every standard library.
	You can use it to save time.
	NOTE: This header file may not be recognized by compilers
	other than gcc.
	*/
	#include <bits/stdc++.h>

	/*
	//Use this if the above header file doesn't work.