jodosha

#!/usr/bin/env ruby -w
require "benchmark"

TIMES = 100_000
ARRAY = (1..1_000).to_a

Benchmark.bm(30) do |b|
  b.report "each" do
    TIMES.times do |i|
      ARRAY.each do |element|

ymasory

/** Use with a default value, for example:
 *  runningScalaVersion getOrElse "2.8.0"
 */
lazy val runningScalaVersion = {
  val matcher = """version (\d+\.\d+\.\d+).*""".r
  util.Properties.versionString match {
    case matcher(versionString) => Some(versionString)
    case _ => None
  }
}

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

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

amejiarosario

Rails Migration

http://guides.rubyonrails.org/migrations.html

Migrations methods:

• add_column
• add_index
• change_column
• change_table
• create_table
• drop_table

nthx

// ==UserScript==
// @match      https://yourwebsite.com/xyz
// @require    http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js
// @require    http://cdnjs.cloudflare.com/ajax/libs/sugar/1.3/sugar.min.js
// ==/UserScript==

alert('Hello, I got jQuery included and sugarJs too');

var runEverySecond = function(){
  $('p').find('img').attr('width', '0px');

andyhawthorne

#!/bin/sh
set -e

# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/you/apps/app_name/current
PID=$APP_ROOT/tmp/pids/unicorn.pid
CMD="cd $APP_ROOT; bundle exec unicorn -D -c $APP_ROOT/config/unicorn.rb -E production"
AS_USER=andy
set -u

olegykz

namespace :deploy do
  namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      begin
        from = source.next_revision(current_revision) # <-- Fail here at first-time deploy
      rescue
        err_no = true
      end
      if err_no || capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ | wc -l").to_i > 0
        run %Q{cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}

agile-jordi

// With an enumeration like...
// object Color extends Enumeration{...}
// Create a format (or reads or writes) like this:
// val fmt = EnumJson.enumFormat(Color);

// The implementation

object EnumJson {

  def enumReads[E <: Enumeration](enum: E): Reads[E#Value] = new Reads[E#Value] {

jsteiner

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.clean_with(:truncation)
  end

  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  config.before(:each, js: true) do