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

robinsloan

require "rubygems"
require "twitter"
require "json"

# things you must configure
TWITTER_USER = "your_username"
MAX_AGE_IN_DAYS = 1 # anything older than this is deleted

# get these from dev.twitter.com
CONSUMER_KEY = "your_consumer_key"

nossidge

/*

~~ Snowball Poem ~~
Snowball (also called a Chaterism): A poem in which each line is a single word,
and each successive word is one letter longer. One of the constrained writing
techniques invented by the Oulipo (Workshop of Potential Literature).


~~ Program Description ~~
This program takes input from the file "input-raw.txt". It examines the file for

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

wandernauta

#!/usr/bin/env bash

#
# This is sp, the command-line Spotify controller. It talks to a running
# instance of the Spotify Linux client over dbus, providing an interface not
# unlike mpc.
#
# Put differently, it allows you to control Spotify without leaving the comfort
# of your command line, and without a custom client or Premium subscription.
#

sillygwailo

// based on http://avoidtheinevitable.wordpress.com/2013/01/21/instapaper-random-article-bookmarklet/ updated to 
// Instapaper's latest design. This only picks a random article from the first page of Instapaper items
javascript:var l=document.querySelectorAll(".article_item .article_inner_item .host a");l[Math.floor(1+Math.random()*l.length)].click();

swarminglogic

#!/bin/bash

version=1.0.1
versionDate="2014-02-14"

function showHelp() {
echo "watchfile - monitor file(s)/command and perform action when changed

Possible ways of usage
----------------------------------------

jaseg

#!/usr/bin/env python3
import numpy as np
from math import sin, cos, pi, sqrt
import svgwrite
import itertools

def cam(f):
	""" Returns a camera matrix for the given focal length """
	return np.array(((1,0,0,0),
					 (0,1,0,0),

kantale

import os
import matplotlib
from matplotlib.patches import Circle, Wedge, Polygon, Rectangle
from matplotlib.collections import PatchCollection
import matplotlib.pyplot as plt

def karyoplot(karyo_filename, metadata={}, part=1):
	'''
	To create a karyo_filename go to: http://genome.ucsc.edu/cgi-bin/hgTables 

imjasonh

* {
    font-size: 12pt;
    font-family: monospace;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    color: black;
    cursor: default;
}