Jesus Urrutia jesusgoku

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?

Disable HTML Form Input Autocomplete and Autofill

Add autocomplete="off" onto <form> element;
Add hidden <input> with autocomplete="false" as a first children element of the form.

<form autocomplete="off" method="post" action="">
    <input autocomplete="false" name="hidden" type="text" style="display:none;">
    ...

CONFIG

Include `adb` and other android tools on your path

In Users/hugomatilla.bash_profile add export PATH=$PATH:/Users/hugomatilla/Documents/AndroidSDKs/sdk/platform-tools export PATH=$PATH:/Users/hugomatilla/Documents/AndroidSDKs/sdk/tools

My own adb location

cd /Users/hugomatilla/Documents/AndroidSDKs/sdk/platform-tools

Vanilla JavaScript Quick Reference / Cheatsheet

Just migrated it from Codepen.io to markdown. Credit goes to David Conner.

Working with DOM	Working with JS	Working With Functions
Accessing Dom Elements	Add/Remove Array Item	Add Default Arguments to Function
Grab Children/Parent Node(s)	Add/Remove Object Properties	Throttle/Debounce Functions
Create DOM Elements	Conditionals

Convert AWS IAM credentials to AWS SMTP credentials

If you do, or want to, use AWS to deploy your apps, you will end up using AWS SES via SMTP when you're launching an app that sends out emails of any kind (user registrations, email notifications, etc). For example, I have used this configuration on various Ruby on Rails apps, however, it is just basic SMTP configurations and crosses over to any framework that supports SMTP sendmail.

There are two ways to go about this:

EASY WAY: Create an SMTP user via AWS SES [http://docs.aws.amazon.com/ses/latest/DeveloperGuide/smtp-credentials.html#smtp-credentials-console]
NOT SO EASY WAY: Create an SMTP password for an existing IAM user [^^ Same link scroll down]

Luckily, you found this MD file and the NOT SO EASY WAY is suddenly copy-pasta... sudo yum....

Simple automated GIT Deployment using GIT Hooks

Here are the simple steps needed to create a deployment from your local GIT repository to a server based on this in-depth tutorial.

How it works

You are developing in a working-copy on your local machine, lets say on the master branch. Most of the time, people would push code to a remote server like github.com or gitlab.com and pull or export it to a production server. Or you use a service like deepl.io to act upon a Web-Hook that's triggered that service.

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.


	### Full command line options

	```
	ffmpeg -f gif -i FOO.gif -pix_fmt yuv420p -c:v libx264 -movflags +faststart -filter:v crop='floor(in_w/2)2:floor(in_h/2)2' BAR.mp4
	```

	### Notie

	* output mp4 is encoded with h264, support Firefox/Chrome/Safari in Windows, Mac OSX, Android, and iOS.

	# Path to your oh-my-zsh installation.
	export ZSH=/Users/dimitar.danailov/.oh-my-zsh

	# Set name of the theme to load.
	# Look in ~/.oh-my-zsh/themes/
	# Optionally, if you set this to "random", it'll load a random theme each
	# time that oh-my-zsh is loaded.
	# ZSH_THEME="robbyrussell"
	ZSH_THEME="agnoster"

	#!/bin/bash

	# Check if command was ran as root.
	if [[ $(id -u) -eq 0 ]]; then
	echo "The command \"sphp\" should not be executed as root or via sudo directly."
	echo "When a service requires root access, you will be prompted for a password as needed."
	exit 1
	fi

	# Usage