axjs

Grr this took hours to figure out. I was trying to install MJPG-streamer and running VLC command lines and all this crap but nothing worked.

First install motion:

~> sudo apt-get install motion

Then create a config file:

~> mkdir ~/.motion

~> nano ~/.motion/motion.conf

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

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

People

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Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"


	/*
	I've wrapped Makoto Matsumoto and Takuji Nishimura's code in a namespace
	so it's better encapsulated. Now you can have multiple random number generators
	and they won't stomp all over eachother's state.

	If you want to use this as a substitute for Math.random(), use the random()
	method like so:

	var m = new MersenneTwister();

	"use strict"
	var Promise = function () {
	this.state = 'pending'
	this.thenables = []
	}

	Promise.prototype.resolve = function (value) {
	if (this.state != 'pending') return

	this.state = 'fulfilled'

	( function ( global ) {

	'use strict';

	var Promise, PENDING = {}, FULFILLED = {}, REJECTED = {};

	if ( typeof global.Promise === 'function' ) {
	Promise = global.Promise;
	} else {
	Promise = function ( callback ) {

	// This script will boot app.js with the number of workers
	// specified in WORKER_COUNT.
	//
	// The master will respond to SIGHUP, which will trigger
	// restarting all the workers and reloading the app.

	var cluster = require('cluster');
	var workerCount = process.env.WORKER_COUNT \|\| 2;

	// Defines what each worker needs to run

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

axjs

Latency numbers every programmer should know

Python 2.x

Description

Results