mrhm-dev

// the main app file
import express from "express";
import loadDb from "./loadDb"; // dummy middleware to load db (sets request.db)
import authenticate from "./authentication"; // middleware for doing authentication
import permit from "./authorization"; // middleware for checking if user's role is permitted to make request

const app = express(),
      api = express.Router();

// first middleware will setup db connection

mrhm-dev

System Design Cheatsheet

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

Basic Steps

1. 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?

mrhm-dev

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

mrhm-dev

# sets the proxy cache path location, max size 2g
proxy_cache_path  /data/nginx/cache  levels=1:2 keys_zone=STATIC:100m inactive=24h max_size=2g;

# transfers the `Host` header to the backend
proxy_set_header        Host $host;

# uses the defined STATIC cache zone
proxy_cache             STATIC;

# cache 200 10 minutes, 404 1 minute, others status codes not cached

mrhm-dev

Set which editor git should use.

This is the program that will open during a commit with no -m flag, a merge, a rebase, etc...

Select from any installed editor. Examples:

• emacs: emacs
• vi: vi or vim

mrhm-dev

/* 
  ##Device = Desktops
  ##Screen = 1281px to higher resolution desktops
*/

@media (min-width: 1281px) {
  
  //CSS
  

mrhm-dev

I've been deceiving you all. I had you believe that Svelte was a UI framework — unlike React and Vue etc, because it shifts work out of the client and into the compiler, but a framework nonetheless.

But that's not exactly accurate. In my defense, I didn't realise it myself until very recently. But with Svelte 3 around the corner, it's time to come clean about what Svelte really is.

Svelte is a language.

Specifically, Svelte is an attempt to answer a question that many people have asked, and a few have answered: what would it look like if we had a language for describing reactive user interfaces?

A few projects that have answered this question:

mrhm-dev

// Node 8+
// --------------------------------------------------------------
// No external dependencies

const { promisify } = require('util');
const { resolve } = require('path');
const fs = require('fs');
const readdir = promisify(fs.readdir);
const stat = promisify(fs.stat);

mrhm-dev

var buff = new Buffer(100);
fs.open(file, 'r', function(err, fd) {
  fs.read(fd, buff, 0, 100, 0, function(err, bytesRead, buffer) {
    var start = buffer.indexOf(new Buffer('mvhd')) + 17;
    var timeScale = buffer.readUInt32BE(start, 4);
    var duration = buffer.readUInt32BE(start + 4, 4);
    var movieLength = Math.floor(duration/timeScale);
    
    console.log('time scale: ' + timeScale);
    console.log('duration: ' + duration);

mrhm-dev

xcode-select --install
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew update
brew cask install iterm2
# update iterm2 settings -> colors, keep directory open new shell, keyboard shortcuts
brew install bash # latest version of bash
# set brew bash as default shell
brew install fortune
brew install cowsay 
brew install git