Jay Choo jaychoo

Qlobe

Qlobe is a fascinating example of quine in Ruby, submitted by a member of the Ruby core team - Yusuke Endoh.

Programs that output changed executable versions of themselves while managing to spin the globe and still remaining executable are cool, right?

To experience its magic, run the following

curl -fSSl https://gist.githubusercontent.com/shime/f0ebe84ca42c33b51d42/raw/5e74315dc6b6fe572f8a457536ad7eb17ad3f1e4/qlobe.rb > qlobe.rb; while true; do ruby qlobe.rb | tee temp.rb; sleep 1; mv -f temp.rb qlobe.rb; done

Convert sequence of JPEG images to MP4 video

Simple glob:

ffmpeg -r 24 -i '*.JPG' -s hd1080 -vcodec libx264 timelapse.mp4

Start from DSC_0079.JPG

ffmpeg -r 24 -f image2 -start_number 79 -i DSC_%04d.JPG -s hd1080 -vcodec libx264 timelapse2.mp4

C++ Pointer Tutorial

Because pointers can be ugh

"Regular" variables (not pointers)

To understand a pointer, let's review "regular" variables first. If you're familiar with a programming language without pointers like JavaScript, this is what you think when you hear "variable".

When declaring a variable by identifier (or name), the variable is synonymous with its value.

Encoding to Hap from the command line using FFmpeg

For users who prefer working with a command line or need to access advanced encoding settings for Hap the popular FFmpeg library can be used to work with Hap movies.

If this is your first time using FFmpeg you may need to install it on your system, or compile it from source. In either case be sure that Snappy is enabled as part of the binary. If you already have FFmpeg on your system with Snappy enabled, you can skip this step.

You can check that your version of FFmpeg can encode Hap using
```
ffmpeg -encoders | grep hap
```

Turning `emacs` into a Python IDE

## Create a new config/initialisation file

Create a user-level initialisation file init.el:

touch .emacs.d/init.el

	"""A simple demonstration of running background tasks with Tornado.

	Here I am using a basic TCP server which handles streams and keeps
	them open while asynchronously performing a fake task in the
	background. In order to test it, simply telnet to localhost port 8080
	and start typing things to see that the server receives the messages.

	The advantage to running on an executor instead of conventional
	threads is that we can more easily shut it down by stopping the
	tornado IO loop.

	from django.contrib import admin
	from django.contrib.auth import admin as auth_admin
	from .models import *
	from forms import UserChangeForm, UserCreationForm


	class UserAdmin(auth_admin.UserAdmin):
	fieldsets = (
	(None, {'fields': ('email', 'password')}),
	('Personal info', {'fields': ('first_name', 'last_name', 'twitter', 'photo', 'event')}),

	#! /usr/bin/env python
	#
	# Mixpanel, Inc. -- http://mixpanel.com/
	#
	# Python API client library to consume mixpanel.com analytics data.

	import hashlib
	import urllib
	import time
	try:

	# Based on post from: https://snipt.net/chrisdpratt/symmetrical-manytomany-filter-horizontal-in-django-admin/#L-26
	# Only reposting to avoid loosing it.

	"""
	When adding a many-to-many (m2m) relationship in Django, you can use a nice filter-style multiple select widget to manage entries. However, Django only lets you edit the m2m relationship this way on the forward model. The only built-in method in Django to edit the reverse relationship in the admin is through an InlineModelAdmin.

	Below is an example of how to create a filtered multiple select for the reverse relationship, so that editing entries is as easy as in the forward direction.

	IMPORTANT: I have no idea for what exact versions of Django this will work for, is compatible with or was intended for.

	defmodule Map.Helpers do
	@moduledoc """
	Functions to transform maps
	"""

	@doc """
	Convert map string camelCase keys to underscore_keys
	"""
	def underscore_keys(nil), do: nil