Jay Tran jaytranuts247

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

brew doctor
brew update

Dotnet Core Cheat Sheet

This cheat sheet is courtesy Ben Day and is available here. This Markdown file is just for easy reference for programmers.

What follows are the excerpts from Ben's blog.

The nice thing about the items on this ‘cheat sheet’ is that they work on Windows, Mac, and Linux. [Note 2/13/2017: Want an example script? Check this out.

Create a new Solution (*.sln)

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

All hex value from 100% to 0% alpha:

Gist

This is a quick tutorial explaining how to get a static website hosted on Heroku.

Why do this?

Heroku hosts apps on the internet, not static websites. To get it to run your static portfolio, personal blog, etc., you need to trick Heroku into thinking your website is a PHP app. This 6-step tutorial will teach you how.

Basic Assumptions

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

	const io = require('socket.io-client');

	const socket = io('http://localhost:3000', {
	transportOptions: {
	polling: {
	extraHeaders: {
	'Authorization': 'Bearer abc',
	},
	},
	},

	const puppeteer = require('puppeteer');
	const proxyChain = require('proxy-chain');

	(async() => {
	const oldProxyUrl = 'http://bob:password123@proxy.example.com:8000';
	const newProxyUrl = await proxyChain.anonymizeProxy(oldProxyUrl);

	// Prints something like "http://127.0.0.1:45678"
	console.log(newProxyUrl);

	// Bootstrap

	/* Custom, iPhone Retina */
	@media only screen and (min-width : 320px) {

	}

	/* Extra Small Devices, Phones */
	@media only screen and (min-width : 480px) {