arbaaz

An Ansible summary

Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)

Configuration file

intro_configuration.html

First one found from of

arbaaz

require 'active_support'
module CRUDActions
  extend ActiveSupport::Concern
  
  included do
    before_action :set_resource, only: [:show, :update, :destroy]
  end
  
  # Returns count of records matching the scope
  def count

arbaaz

#!/usr/bin/env bash
# Ask for the administrator password upfront
sudo -v

# Keep-alive: update existing `sudo` time stamp until the script has finished
while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &

install_thoughtbot() {
  mkdir -p "$HOME/installer/logs" && cd "$HOME/installer"

arbaaz

/*==================================================
=            Bootstrap 3 Media Queries             =
==================================================*/
 
/*==========  Mobile First Method  ==========*/
 
/* Custom, iPhone Retina */ 
@media only screen and (min-width : 320px) {
    
}

arbaaz

# SSL self signed localhost for rails start to finish, no red warnings. 

# 1) Create your private key (any password will do, we remove it below)

$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

arbaaz

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

arbaaz

sudo touch /etc/apt/sources.list.d/pgdg.list
echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" | sudo tee -a /etc/apt/sources.list.d/pgdg.list
wget --quiet -O - http://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc | sudo apt-key add -

sudo apt-get update
sudo apt-get -y install postgresql-9.3 libpq-dev postgresql-contrib-9.3
sudo apt-get autoremove

sudo pg_dropcluster --stop 9.3 main
sudo pg_createcluster --start -e UTF-8 9.3 main

arbaaz

// backbone collections lack a search functionality. This adds it to all collections.
// fuse.js is the library that powers the fuzzy search and requires being downloaded and included into your app
// http://kiro.me/projects/fuse.html


_.extend(Backbone.Collection.prototype, {
  searchableFields: null,
  buildSearchIndex: function(options) {
    options = (typeof options !== 'undefined') ? options : {};

arbaaz

/**
 * Retrieves all the rows in the active spreadsheet that contain data and logs the
 * values for each row.
 * For more information on using the Spreadsheet API, see
 * https://developers.google.com/apps-script/service_spreadsheet
 */
function readRows() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var rows = sheet.getDataRange();
  var numRows = rows.getNumRows();

arbaaz

# http://stackoverflow.com/questions/4397412/read-edit-and-write-a-text-file-line-wise-using-ruby
# files = Dir.glob(File.dirname(__FILE__)+"/../app/**/*.rb")
files = Dir[Rails.root.join("app", "**/*.rb")]

files.each do |f_name|
  # puts f_name
  File.open(f_name, "r+") do |f|

    old_pos = 0
    f.each do |line|