dharmatech

As some of you know, one of my projects is an implementation of Context Free Art in Scheme. It was a part of Abstracting and has been ported to Agave.

The only part of the task that I'd tackled was a core engine which would interpret low-level state machine instructions and a way to render the results of this interpretation. The Scheme versions of the CFDG programs were thus much longer; the flow control of the program was explicit, whereas most of this is implicit in the CFDG language.

vitex

#!/bin/sh

########################################################################
#
# Usage: via-ssh.sh [-v] [-d] [USER@]SERVER[:PORT]
#
#          -v       Provide verbose output.             
#          -d       Send all UDP on the DNS port 53 to 127.0.0.1.
#          USER     User name to use for SSH; default is current user.
#          SERVER   Server to use for SSH.

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

windytan

use warnings;
use Getopt::Std;

getopt('xytGgwsf',\%opts);

# pcm file = $opts{f}

# samples per pixel x
$xscale = $opts{x} // 1200;

dolphin278

Uses capped collection, tailable cursors and streams.

What's here?

• init.js recreates collection capped collection 'queue' on mongodb.
• writer.js spams queue with new messages
• worker.js processes all messages saved to queue,
• onceWorker.js processes only unprocessed messages, so you can spawn several of them and each of your messages will be processed by only one worker.

Steps

plentz

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

wsargent

303 See Other

Location: https://github.com/wsargent/docker-cheat-sheet

Hi there!

The docker cheat sheet has moved to a Github project under https://github.com/wsargent/docker-cheat-sheet.

Please click on the link above to go to the cheat sheet.

geekle

#!/bin/bash
 
# Creates a bootable ISO from CoreOS' PXE images.
# Also adds a run script to the OEM partition and converts the ISO so it can boot from USB media.
# Based heavily off https://github.com/nyarla/coreos-live-iso - Thanks Naoki!
 
set -e
 
# Default configurations
SYSLINUX_VERSION="6.02"

mbn18

# Ubuntu 14.04 don't have nsenter - the straight forward way required me to install build tools and etc.
# I preferred to keep the system clean and install nsenter in a container and then copy the command to the host
# Note - its also possible to run nsenter from a container (didn't tried) https://github.com/jpetazzo/nsenter

# start a container
docker run --name nsenter -it ubuntu:14.04 bash

## in the docker
apt-get update
apt-get install git build-essential libncurses5-dev libslang2-dev gettext zlib1g-dev libselinux1-dev debhelper lsb-release pkg-config po-debconf autoconf automake autopoint libtool