Rahul Jyala RahulJyala7

Nginx Cheat Sheet

(from Understanding Nginx Server and Location Block Selection Algorithms - https://goo.gl/YyzshP)

server {

npm v3.10 - ◾

⚠️ This gist is outdated, but most of the commands are still relevant.

Update npm itself

npm install -g npm
# Downgrade to a specific version
npm install -g npm@2

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv

S.O.L.I.D principles

Single Responsibility Principle
Open/Closed Principle
Liskov Substitution Principle
Interface Segregation Principle
Dependency Inversion Principle

Single Responsibility Principle

Lenovo ideapad 330 (15ARR) ubuntu issues and their solutions

Issue-1: None of the ubuntu distros are getting installed

Solution: Ubuntu distros lower than 18.10 will not work in this laptop, as minimum kernal version required is 4.18.

So install ubuntu 18.10 / xubuntu 18.10 / lubuntu 18.10 / kubuntu 18.10 in UEFI mode

Issue-2: Wifi is not working

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

"Build tools for others that you want to be built for you." - Kenneth Reitz
"Simplicity is alway better than functionality." - Pieter Hintjens

https://www.saltycrane.com/blog/2017/08/docker-cheat-sheet/

Inspired by this article. Neat tricks for speeding up integer computations.

Note: cin.sync_with_stdio(false); disables synchronous IO and gives you a performance boost. If used, you should only use cin for reading input (don't use both cin and scanf when sync is disabled, for example) or you will get unexpected results.

Multiply by a power of 2

x = x << 1; // x = x * 2

Shallow

Real unit test (isolation, no children render)

Simple shallow

Calls:

constructor
render

	if(process.argv.length < 3){
	console.log('target file path is required.')
	process.exit(1)
	}

	var target = process.argv[2]
	console.log('file: ' + target)

	var fs = require('fs')
	fs.readFile(target, function (err, data) {