icebreaker

The MONGOID Cheat Sheet

( Source: the mongoid cheatsheet )

Example

  class User

include Mongoid::Document

fpotter

#!/usr/bin/env dtrace -s
/*
 * DTrace script to observe UNIX socket reads/writes for RubyMotion apps running
 * in the iOS Simulator.
 *
 * Usage: sudo dtrace_rubymotion_repl <pid of running RubyMotion iOS app>
 *
 */

syscall::sendto:entry

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

danielsdeleo

#!/usr/bin/env ruby

recipe_path = ARGV[0]

if recipe_path.nil?
  STDERR.puts "usage: chef-apply RECIPE_FILE"
  exit 1
end

recipe_path = File.expand_path(recipe_path)

tlewin

#!/usr/bin/env ruby -I ../lib -I lib
# coding: utf-8
require 'rtoken'
require 'json'

require 'sinatra/base'
require 'thin'

class Chat < Sinatra::Base

syzdek

#!/bin/sh
#
# Use posixregex CLI tool from: https://github.com/syzdek/dmstools/blob/master/src/posixregex.c

RE_IPV4="((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])"

posixregex -r "^(${RE_IPV4})$" \
   127.0.0.1 \
   10.0.0.1 \
   192.168.1.1 \

oroce

user www-data;
worker_processes 1;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    sendfile on;

jerluc

# As sudo

ceph osd crush remove osd.{osd-num}
ceph auth del osd.{osd-num}
ceph osd rm {osd-num}
ceph osd crush remove {host}

ismasan

// Copyright (c) 2017 Ismael Celis

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all

mholt

package main

import (
	"log"
	"os"
	"strings"

	gq "github.com/PuerkitoBio/goquery"
)