jed

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Jed Schmidt <http://jed.is>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

wch

if (!require(quantmod)) {
  stop("This app requires the quantmod package. To install it, run 'install.packages(\"quantmod\")'.\n")
}

# Download data for a stock if needed, and return the data
require_symbol <- function(symbol, envir = parent.frame()) {
  if (is.null(envir[[symbol]])) {
    envir[[symbol]] <- getSymbols(symbol, auto.assign = FALSE)
  }

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:

dapurv5

/**
 *  Copyright (c) 2013 Apurv Verma
 */
package org.anahata.hadoop.illustrations;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.anahata.commons.hadoop.io.IntInt;

nkelner

This map is rendered dynamically using d3.js with topoJSON data from the us-atlas.

ianunruh

#!/bin/bash
if [ "$#" -ne "2" ]; then
  echo "Usage: ./install-redis-instance.sh NAME PORT"
  exit 1
fi

if [ ! -x /usr/local/bin/redis-server ]; then
  apt-get install -y build-essential

  curl -O -L http://download.redis.io/releases/redis-2.8.9.tar.gz