iagooar

def valid_json?(value)
  JSON.parse value
  true
rescue JSON::ParserError, TypeError
  false
end

iagooar

alter database DATABASE_NAME charset=utf8

iagooar

class MySingletonClass
  include Singleton

  def initialize
    ## Do some initializing
  end

  ## Your business logic

end

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#!/usr/bin/env bash
apt-get -y update
apt-get -y install build-essential zlib1g-dev libssl-dev libreadline5-dev libyaml-dev
cd /tmp
wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p125.tar.gz
tar -xvzf ruby-1.9.3-p125.tar.gz
cd ruby-1.9.3-p125/
./configure --prefix=/usr/local
make
make install

iagooar

# Disclaimer: this solution has been taken from the post: http://stackoverflow.com/a/5071198/784270

# navigate to the bundler gem and in lib/bundler/runtime.rb, 
# find the line that does Kernel.require and wrap it like this

puts Benchmark.measure("require #{file}") {
  Kernel.require file
}.format("%n: %t %r")

# Add 

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require 'benchmark'

name = 'my_cool_string'

Benchmark.bmbm(10) do |x|
  x.report('name[0] hit') do
    1_000_000.times { name[0] == 'm' }
  end
  x.report('name[0] miss') do
    1_000_000.times { name[0] == 'y' }

iagooar

source 'https://rubygems.org'

gem 'rack-reverse-proxy', require: 'rack/reverse_proxy'

group :development do
  gem 'foreman'
end

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class MemoryCache

  DEFAULT_MAX_KEYS = 5000

  attr_reader :data, :max_keys

  def initialize(config)
    @data = {}
    @max_keys = config[:max_cache_keys] || DEFAULT_MAX_KEYS
    @lock = Mutex.new

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# Currently, many times we are using ENV variables in a non-optimal way.
# I'd like to explain some of the common use cases for those variables 
# and how we can use them in a way that we get the most out of it.

# A common error is to assume that the variable has to be there, but it isn't
# This happens when we use the ENV hash like this:

ENV['SOME_KEY']

# In Ruby, if the key is missing, it will return `nil`, thus calling a method on it

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YourApplication::Application.routes.draw do
  root to: 'home#index'
  get '/about'
  get '/login' => 'application#login'
end

ADDITIONAL_ROUTES = [:messages, :orders, :api, :admin]
ADDITIONAL_ROUTES.each do |route_file|
  require "#{Rails.root}/config/routes/#{route_file}"
end