EvanHahn

/*

JavaScript Caesar shift
by Evan Hahn (evanhahn.com)

"Encrypt" like this:

    caesarShift('Attack at dawn!', 12);    // Returns "Mffmow mf pmiz!"

And "decrypt" like this:

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

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

yanatan16

'''
Simultaneous Perturbation Stochastic Approximation
Author: Jon Eisen
License: MIT

This code defines runs SPSA using iterators.
A quick intro to iterators:
Iterators are like arrays except that we don't store the whole array, we just
store how to get to the next element. In this way, we can create infinite
iterators. In python, iterators can act very similar to arrays.

fish.py

#!/usr/local/bin/python3.2

"""

Python interpreter for the esoteric language ><> (pronounced /ˈfɪʃ/).
Usage: ./fish.py --help

More information: http://esolangs.org/wiki/Fish

Requires python 2.7/3.2 or higher.

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

ornicar

Lichess games CSV export

This is a direct export from lichess database. Some fields are binary encoded.

Head

_id,so,s,v,if,us,p0.ai,p0.e,p1.ai,p1.e,c,mt,w,an,ra,pg,ca
"04tbfylw",1,33,,,"[ ""miroslavm970"", ""redlightning530"" ]",,1480,,1072,0500000884000B930000000000,4665B5,true,,true,23242B55806A801C6140,2013-11-14T07:59:10.945Z

niklasf

#!/usr/bin/python

import chess
import chess.uci
import sys
import time


MOVETIME = 120.0

lolzballs

import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;

public class HelloWorld{
	private static HelloWorld instance;
    public static void main(String[] args){
        instantiateHelloWorldMainClassAndRun();

niklasf

#!/usr/bin/python3
# Fuzz testing for UCI engines using python-chess.

import chess
import chess.uci
import random
import logging
import sys

random.seed(123456)