James Stidard jamesstidard

Forgotten Commands

git

Remove accidently tracked files/folders from git and keep local.

$ git rm --cached -r <somedir/file/regex>

Undo previous unpushed commits, keeping the changes, for better commit message.

Configuring AWS ECS to have access to AWS EFS

If you would like to persist data from your ECS containers, i.e. hosting databases like MySQL or MongoDB with Docker, you need to ensure that you can mount the data directory of the database in the container to volume that's not going to dissappear when your container or worse yet, the EC2 instance that hosts your containers, is restarted or scaled up or down for any reason.

Don't know how to create your own AWS ECS Cluster? Go here!

New Cluster

Sadly the EC2 provisioning process doesn't allow you to configure EFS during the initial config. After your create your cluster, follow the guide below.

New Task Definition for Web App

If you're using an Alpine-based Node server like duluca/minimal-node-web-server follow this guide:

engine = create_engine(engineUrl, convert_unicode=True, poolclass=NullPool)

def jsonExtract(item, key):
    j = json.loads(item)
    value = j.get(key)
    return value

@sqlalchemy.event.listens_for(engine, "begin")
def do_begin(conn):

Recently CSS has got a lot of negativity. But I would like to defend it and show, that with good naming convention CSS works pretty well.

My 3 developers team has just developed React.js application with 7668 lines of CSS (and just 2 !important). During one year of development we had 0 issues with CSS. No refactoring typos, no style leaks, no performance problems, possibly, it is the most stable part of our application.

Here are main principles we use to write CSS for modern (IE11+) browsers:

SUIT CSS naming conventions + SUIT CSS design principles;
PostCSS + CSSNext. Future CSS syntax like variables, nesting, and autoprefixer are good enough;
Flexbox is awesome. No need for grid framework;
Normalize.css, base styles and variables are solid foundation for all components;

What I did to get Python 3.4.2 on Ubuntu 14.04. The stock version of Python 3 on Ubuntu is 3.4.0. Which is missing some of the best parts! (asyncio, etc). Luckily I discovered pyenv which solved my problem.

Install pyenv

Pyenv (not to be confused with pyvenv) is the Python equivelant of rbenv. It lets you configure which Python environment/version is available per directory, user, or other session variables.

I followed the instructions here to install pyenv in my home directory. Verbatem, those instructions are:

sudo apt-get install git python-pip make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

	import Foundation
	import AudioToolbox

	class KKSimplePlayer: NSObject {
	var URL: NSURL
	var URLSession: NSURLSession!
	var packets = [NSData]()
	var audioFileStreamID: AudioFileStreamID = nil
	var outputQueue: AudioQueueRef = nil
	var streamDescription: AudioStreamBasicDescription?

	import Foundation

	public protocol AlmostEquatable {
	@warn_unused_result
	func ==~(lhs: Self, rhs: Self) -> Bool
	}

	public protocol EquatableWithinEpsilon: Strideable {
	static var Epsilon: Self.Stride { get }
	}