plamb

OKC Elixir Study Group -- DRAFT

###Disclaimer I have no freaking idea what I'm doing or if this will even work out but that's never really stopped me from trying. So let's see where it goes. Committing to a group that meets physically together was going to be tough, so I wondered how well a virtual group would work, no travel time, can do it after the kids go to bed, etc. I'm also going to put a time limit on this, both in how long the group meets and how long we do this.

##Concept Over the next 6 months, work through some of the problems in Brian Hogan's Exercises for Programmers using Elixir. Then once or twice a month, we will hold a 45-60 minute skype conference call to discuss problems we had and how we solved them.

###Format

Time	Agenda

milmazz

defmodule IPv4Parser do
  @moduledoc """
  Exercise 2.8.6 from the book The Little Elixir & OTP Guidebook

  The idea is to take a look at the IPv4 packet spec and try to write a
  parser.
  """

  def parse(packet) do
    <<

davidfowl

$/
  artifacts/
  build/
  docs/
  lib/
  packages/
  samples/
  src/
 tests/

LeCoupa

#!/bin/bash
#####################################################
# Name: Bash CheatSheet for Mac OSX
# 
# A little overlook of the Bash basics
#
# Usage:
#
# Author: J. Le Coupanec
# Date: 2014/11/04

rxaviers

People

:bowtie:	😄 :smile:	😆 :laughing:
😊 :blush:	😃 :smiley:	☺️ :relaxed:
😏 :smirk:	😍 :heart_eyes:	😘 :kissing_heart:
😚 :kissing_closed_eyes:	😳 :flushed:	😌 :relieved:
😆 :satisfied:	😁 :grin:	😉 :wink:
😜 :stuck_out_tongue_winking_eye:	😝 :stuck_out_tongue_closed_eyes:	😀 :grinning:
😗 :kissing:	😙 :kissing_smiling_eyes:	😛 :stuck_out_tongue:

grantslatton

#include <stdio.h>
int f0(unsigned int x) { return x? (x&(1<<31)? f1(x<<1) : f0(x<<1)) : 1; }
int f1(unsigned int x) { return x? (x&(1<<31)? f3(x<<1) : f2(x<<1)) : 0; }
int f2(unsigned int x) { return x? (x&(1<<31)? f0(x<<1) : f4(x<<1)) : 0; }
int f3(unsigned int x) { return x? (x&(1<<31)? f2(x<<1) : f1(x<<1)) : 0; }
int f4(unsigned int x) { return x? (x&(1<<31)? f4(x<<1) : f3(x<<1)) : 0; }

int t0(unsigned int x) { return x? (x&(1<<31)? t1(x<<1) : t0(x<<1)) : 1; }
int t1(unsigned int x) { return x? (x&(1<<31)? t0(x<<1) : t2(x<<1)) : 0; }
int t2(unsigned int x) { return x? (x&(1<<31)? t2(x<<1) : t1(x<<1)) : 0; }

filipw

using System;
using System.Linq.Expressions;
using System.Reflection;
using WebApi.Delta;

namespace Hst.Deals.API.Infrastructure
{
    internal class CompiledPropertyAccessor<TEntityType> : PropertyAccessor<TEntityType> where TEntityType : class
    {
        private Action<TEntityType, object> _setter;

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

padolsey

// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
//     ie === undefined
// If you're in IE (>=5) then you can determine which version:
//     ie === 7; // IE7
// Thus, to detect IE:
//     if (ie) {}