paulsmith

/**
 * A simple preforking echo server in C.
 *
 * Building:
 *
 * $ gcc -Wall -o echo echo.c
 *
 * Usage:
 *
 * $ ./echo

netmute

Game of Life

An implementation of Conway's Game of Life in 140 characters of Ruby.

Author

Created by Simon Ernst (@sier).

ckirkendall

(use '[clojure.core.match :only [match]])

(defn evaluate [env [sym x y]]
  (match [sym]
    ['Number]   x
    ['Add]      (+ (evaluate env x) (evaluate env y))
    ['Multiply] (* (evaluate env x) (evaluate env y))
    ['Variable] (env x)))
    
(def environment {"a" 3, "b" 4, "c" 5})

addyosmani

Update May 2017

Eric Bidelman has documented some of the common workflows possible with headless Chrome over in https://developers.google.com/web/updates/2017/04/headless-chrome.

Update

If you're looking at this in 2016 and beyond, I strongly recommend investigating real headless Chrome: https://chromium.googlesource.com/chromium/src/+/lkgr/headless/README.md

Windows and Mac users might find using Justin Ribeiro's Docker setup useful here while full support for these platforms is being worked out.

kachayev

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

mpasternacki

FreeBSD on a MacBook Pro

Since 2008 or 2009 I work on Apple hardware and OS: back then I grew tired of Linux desktop (which is going to be MASSIVE NEXT YEAR, at least since 2001), and switched to something that Just Works. Six years later, it less and less Just Works, started turning into spyware and nagware, and doesn't need much less maintenance than Linux desktop — at least for my work, which is system administration and software development, probably it is better for the mythical End User person. Work needed to get software I need running is not less obscure than work I'd need to do on Linux or othe Unix-like system. I am finding myself turning away from GUI programs that I used to appreciate, and most of the time I use OSX to just run a terminal, Firefox, and Emacs. GUI that used to be nice and unintrusive, got annoying. Either I came full circle in the last 15 years of my computer usage, or the OSX experience degraded in last 5 years. Again, this is from a sysadmin/developer ki

nerdalert

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

grugq

Simple Security Guidelines

Using an iDevice? (Best option)

• Use an iPod or an iPad without a SIM card
• Use an iPhone
• Do not jailbreak
• Always upgrade to new iOS versions
• Use Brave browser

Need Secure chat?

alirobe

### 
###
### UPDATE: For Win 11, I recommend using this tool in place of this script: 
### https://christitus.com/windows-tool/
### https://github.com/ChrisTitusTech/winutil
### https://www.youtube.com/watch?v=6UQZ5oQg8XA
### iwr -useb https://christitus.com/win | iex
###
###

williame

# -*- coding: utf-8 -*-

def Ord(ch): return ord(ch) - ord('A') # convert A-Z to 0-25
def Chr(ch): return chr(ch + ord('A')) # convert 0-25 to A-Z
def Text(s): return "".join(ch for ch in s if ch in "ABCDEFGHIJKLMNOPQRSTUVWXYZ")

Rotors = { # name: (wiring, notches) 
        "I":    ("EKMFLGDQVZNTOWYHXUSPAIBRCJ", "Q"), # 1930 Enigma I
        "II":   ("AJDKSIRUXBLHWTMCQGZNPYFVOE", "E"), # 1930 Enigma I
        "III":  ("BDFHJLCPRTXVZNYEIWGAKMUSQO", "V"), # 1930 Enigma I