Jernej Sila JSila

Migrations & Seeding

What are migrations??

Migrations are a way to make database changes or updates, like creating or dropping tables, as well as updating a table with new columns with constraints via generated scripts. We can build these scripts via the command line using knex command line tool.

To learn more about migrations, check out this article on the different types of database migrations!

Creating/Dropping Tables

How to change your commit messages in Git?

At some point you’ll find yourself in a situation where you need edit a commit message. That commit might already be pushed or not, be the most recent or burried below 10 other commits, but fear not, git has your back 🙂.

Not pushed + most recent commit:

git commit --amend

This will open your $EDITOR and let you change the message. Continue with your usual git push origin master.

Using PsySH (GitHub) as the Yii2 shell

Issue the following commands from the command line in your Yii application directory:
- chmod +x psyii
- mkdir extensions/yiishell
- wget -O extensions/yiishell/psysh psysh.org/psysh
- chmod +x extensions/yiishell/psysh
Copy the file init.php below to psysh/init.php and update any paths to work with your application configuration
Copy the file config.php below to psysh/config.php. Change or add to the config array with the options you'd like to use (available options)
Now you can start PsySH with the command ./psyii psysh/init.php --config psysh/config.php

Converting libraries to Ember CLI addons

In this guide we will cover two main cases:

Ember specific library
vendor library

Ember library

The Ember library will assume that Ember has already ben loaded (higher in the loading order) and thus will assume it has access to the Ember API.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	IMPORTANT

	Please duplicate this radar for a Safari fix!
	This will clean up a 50-line workaround.

	rdar://22376037 (https://openradar.appspot.com/radar?id=4965070979203072)

	//////////////////////////////////////////////////////////////////////////////

	(Now available as a standalone repo.)

	<!-- Video element (live stream) -->
	<label>Video Stream</label>
	<video autoplay id="video" width="640" height="480"></video>

	<!-- Canvas element (screenshot) -->
	<label>Screenshot (base 64 dataURL)</label>
	<canvas id="canvas" width="640" height="480"></canvas>

	<!-- Capture button -->
	<button id="capture-btn">Capture!</button>

	import requests
	from requests_oauthlib import OAuth1
	from flask import Flask, request, redirect, session
	from urlparse import parse_qs
	import os

	app = Flask(__name__)

	# This information is obtained upon registration of a new client on twitter
	key = u"<your client key>"

	/*
	* This work is free. You can redistribute it and/or modify it under the
	* terms of the Do What The Fuck You Want To Public License, Version 2,
	* as published by Sam Hocevar. See the COPYING file for more details.
	*/
	/*
	* Easing Functions - inspired from http://gizma.com/easing/
	* only considering the t value for the range [0, 1] => [0, 1]
	*/
	EasingFunctions = {