Luca Belluccini lucabelluccini

Essential JavaScript Links

I no longer mantain this list. There are lots of other very comprehensive JavaScript link lists out there. Please see those, instead (Google "awesome JavaScript" for a start).

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

How do I round to 2 decimals?

In python, you have floats and decimals that can be rounded. If you care about the accuracy of rounding, use decimal type. If you use floats, you will have issues with accuracy.

All the examples use demical types, except for the original value, which is automatically casted as a float.

To set the context of what we are working with, let's start with an original value.

Original Value

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

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

	#include <OVR.h>
	#undef new
	#undef min
	#undef max
	#include <glm/glm.hpp>
	#include <glm/gtc/matrix_transform.hpp>
	#include <glm/gtc/type_ptr.hpp>
	#include <glm/gtc/noise.hpp>
	#include <glm/gtc/epsilon.hpp>
	#include <glm/gtx/norm.hpp>

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	using UnityEngine;
	using System.Collections;

	public class Fps : MonoBehaviour
	{
	private float count;

	private IEnumerator Start()
	{
	GUI.depth = 2;

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <signal.h>
	#include <time.h>

	#include "hiredis.h"
	#include "async.h"
	#include "adapters/ae.h"
	#include "sha1.h"