Ilias Reshetnikov devxom

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?

These are the Kickstarter Engineering and Data role definitions for both teams.

Technical	Data	People
Junior Software Engineer
Software Engineer	Data Analyst
Senior Software Engineer	Data Scientist	Engineering Manager
Staff Engineer	VP of Data	Engineering Director
Principal Engineer		CTO

New ES6 Constructor Semantics and Usage Examples

Manual super: Alternative Design where subclass constructors do not automatically call superclass constructors

This Gist presents a new design of class-based object construction in ES6 that does not require use of the two-phase @@create protocol.

One of the characteristics of this proposal is that subclass constructors must explicitly super invoke their superclass's constructor if they wish to use the base class' object allocation and initialization logic.

An alternative version of this design automatically invokes the base constructor in most situations.

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!

\

Jekyll & Liquid Cheatsheet

A list of the most common functionalities in Jekyll (Liquid). You can use Jekyll with GitHub Pages, just make sure you are using the proper version.

Running

Running a local server for testing purposes:

	#!/usr/bin/env bash #adding this to force silly gist highlighting. REMOVE THIS

	# This is a modified version of the script generated by https://docs.npmjs.com/cli/completion to include `npm install` autocompletion.
	# Basically we added `if` blocks to check for `install` subcommand.

	###-begin-npm-completion-###
	#
	# npm command completion script
	#
	# Installation: npm completion >> ~/.bashrc (or ~/.zshrc)

	#/bin/bash
	#-- Script to automatically convert all git remotes to HTTPS from SSH
	# Script will change all the git remotes.
	# If you didn't intend to do that, run the other script in this repo.
	# Original 1: https://gist.github.com/m14t/3056747
	# Original 2: https://gist.github.com/chuckbjones/9dc6634fe52e56ba45ac
	# Thanks to @m14t, @michaelsilver and @chuckbjones.

	ssh_to_https(){
	REPO_URL=`git remote -v \| grep -m1 "^$1" \| sed -Ene's#.(git@github.com:[^[:space:]]).*#\1#p'`

	# NOTES

	# Spotify 0.9 vs 1.0 is stable, uses less resources overall and works well with Spotify Connect, SpotCommander, Local Files etc
	# Tested and works on Fedora 29 64-bit with GNOME, but should work on previous versions as well
	# The sources of the Dropbox files, which are hosted by me and the latest and greatest available, are listed above each one
	# No system files will be overwritten by these or used by other programs since they depend on the later Fedora versions
	# Make sure you copy the whole lines into Terminal
	# Each command is on one line and might be long

	# START GUIDE

	#!/bin/sh

	# Firefox Developer Edition install
	# No need to download this script, just run it on your terminal:
	# $ curl -L git.io/firefoxdev \| sh
	# When you need to update Firefox Developer Edition, run this script again.

	START_CMD="firefox-dev"
	INSTALLATION_DIR="/opt/${START_CMD}"

	fixed3 Darken (fixed3 a, fixed3 b)
	{
	return min(a, b);
	}

	fixed3 Multiply (fixed3 a, fixed3 b)
	{
	return a * b;
	}