bernerdschaefer

# Newbie Programmer
def factorial(x)
  if x == 0
    return 1
  else
    return x * factorial(x - 1)
  end
end
puts factorial(6)
puts factorial(0)

netshade

A long, long time ago...
I can still remember
How his blog used to make me smile.
And I knew that if he had his chance
That he could make their code enhance
And, maybe, they’d be happy for a while.

But August made me shiver
With every code line I’d deliver.
Bad news on the doorstep;

ChickenProp

After installing Arch on my Raspberry Pi, internet worked out of the box: I could plug it into the router, turn it on, ssh in and start downloading things. But the router is in my housemate's bedroom, which isn't ideal. If I want the Pi to be connected to the internet in my room, I need it to be connected to my laptop. (Another option would be a USB wifi dongle, of course.) This is how I did it. Much credit goes to the Ubuntu wiki's Connection sharing page.

I should disclaim that I don't fully understand networking stuff, and some of what I say might be wrong. I also didn't write this as I was going; so while I've consulted my browser and shell histories, it's possible I've forgotten some steps.

My laptop is running Gentoo, and this is where most of the work has to be done. It connects to the internet through wifi, on interface wlan0. The ethernet port is eth0, and eth0 is also the name of the ethernet port on the Pi.

Step zero: plug ev

Sjors

#!/usr/bin/env ruby
require 'open-uri'
require 'JSON'
require 'digest/sha2'
require 'pry'
require 'bigdecimal'
require 'bitcoin' # Because I need to cheat every now and then

# Usage:
# gem install pry json ffi ruby-bitcoin

marianposaceanu

Linux simple performance tweaks

Change the I/O Scheduler

Open $ vim /etc/default/grub then add elevator=noop next to GRUB_CMDLINE_LINUX_DEFAULT. Run $ update-grub and $ cat /sys/block/sda/queue/scheduler to be sure that noop is being used:

$ vim /etc/default/grub
$ update-grub
$ cat /sys/block/sda/queue/scheduler

[noop] deadline cfq

bcherny

umd = (factory) ->
	if typeof exports is 'object'
		module.exports = factory()
	else if typeof define is 'function' and define.amd
		define([], factory)
	else
		@MODULE_NAME = factory()

umd

amatus

Howto build a rust compiler for the Raspberry Pi on Debian 7.1 (wheezy)

sudo apt-get install git build-essential
test `uname -m` = x86_64 && sudo apt-get install ia32-libs
git clone https://github.com/raspberrypi/tools.git
export PATH=$PWD/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:$PATH
git clone http://github.com/mozilla/rust.git
cd rust
./configure --target-triples=arm-unknown-linux-gnueabihf

make

KatrinaHoffert

#!/usr/bin/env bash
#
# By Mike Hoffert. Based on build-kernel.sh in OS161.
#
# Alternative build script. Only errors are shown. Will automatically
# configure the script.
#
# Usage:
#  ./build-kernel2 <kernel-name> [options]
#

dwgill

#!/usr/bin/env bash
# This script requires:
# - that the directory $HOME/.mpv exist 
# - that the program socat be installed
# - that you start mpv with the unix socket feature pointing at that directory
#   I recommend an alias in your .bashrc or equivalent file:
#       alias mpv="mpv --input-unix-socket=$HOME/.mpv/socket"

socket="$HOME/.mpv/socket"

ddevault

WAYLAND_PROTOCOLS=/usr/share/wayland-protocols

# wayland-scanner is a tool which generates C headers and rigging for Wayland
# protocols, which are specified in XML. wlroots requires you to rig these up
# to your build system yourself and provide them in the include path.
xdg-shell-protocol.h:
	wayland-scanner server-header \
		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@

xdg-shell-protocol.c: xdg-shell-protocol.h