jashkenas

# MAC manipulators
alias random_mac='sudo ifconfig en0 ether `openssl rand -hex 6 | sed "s/\(..\)/\1:/g; s/.$//"`'
alias restore_mac='sudo ifconfig en0 ether YOUR_ORIGINAL_MAC_ADDRESS_GOES_HERE'

taldanzig

Routing tips for VPNs on OS X

When VPNs Just Work™, they're a fantastic way of allowing access to a private network from remote locations. When they don't work it can be an experience in frustration. I've had situations where I can connect to a VPN from my Mac, but various networking situations cause routing conflicts. Here are a couple of cases and how I've been able to get around them.

Specific cases

Case 1: conflicting additional routes.

In this example the VPN we are connecting to has a subnet that does not conflict with our local IP, but has additional routes that conflict in some way with our local network's routing. In my example the remote subnet is 10.0.x.0/24, my local subnet is 10.0.y.0/24, and the conflicting route is 10.0.0.0/8. Without the later route, I can't access all hosts on the VPN without manually adding the route after connecting to the VPN:

quiver

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo

joshaber

self.startButton.rac_command = [RACCommand command];
self.stopButton.rac_command = [RACCommand command];

__unsafe_unretained id weakSelf = self;
id<RACSignal> tick = [[[[self.startButton.rac_command
    map:^(id _) {
        RTAFirstView *strongSelf = weakSelf;
        // Map each start button click to a new signal that fires every second
        // and stops when the stop button is clicked.
        return [[RACSignal interval:1] takeUntil:strongSelf.stopButton.rac_command];

pmuellr

<!-- ====================================================================== -->
<script>
function onLoad() {
    var weinre = 'http://www.example.com/'  // <- change to your weinre server base URL
    var id     = 'testing-1-2-3'

    var targetURL = weinre + 'client#'                + id
    var clientURL = weinre + 'demo/weinre-demo.html#' + id

    document.getElementById('target').src = targetURL

shanbhardwaj

# Git Emacs 24 from the main Savannah (savannah.gnu.org) repository and apply typester's fullscreen patch
rm -fr emacs
git clone git://git.savannah.gnu.org/emacs.git
cd emacs
wget http://cloud.github.com/downloads/typester/emacs/feature-fullscreen.patch
patch -p1 -i feature-fullscreen.patch
cd ..
curl -O http://ftp.gnu.org/gnu/m4/m4-1.4.13.tar.gz
tar -xzvf m4-1.4.13.tar.gz
cd m4-1.4.13

johanbrook

/*

	Custom style for Wordpress Highlight.js plugin.
	By Johan Brook (dark on light colours).

*/

pre code {
  color: #c4cdc5;
}