janko

# lib/carrierwave/orm/activerecord.rb from jnicklas/carrierwave


# before
class_eval <<-RUBY, __FILE__, __LINE__+1
  def #{column}=(new_file)
    column = _mounter(:#{column}).serialization_column
    send(:"\#{column}_will_change!")
    super
  end

janko

// Java
import java.util.BufferedReader;
import java.util.FileReader;
import java.util.IOException;

String content = new String();
try {
  BufferedReader reader = new BufferedReader(FileReader.new(filename));
  String line;
  while ((line = reader.readLine()) != null) {

janko

class ImageQuestion < TextQuestion
  store :data, accessors: [:image]
  mount_uploader :image, ImageUploader

  validates :image, download: true, processing: true
end

class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::MiniMagick

janko

These are upgrading instructions for the new OpenSSL vulnerability, Heartbleed. This is only for Mac, and assumes you have Homebrew installed.

OpenSSL

You need to upgrade OpenSSL to at least version 1.0.1g.

$ brew update
$ brew upgrade openssl
$ brew link --force openssl

janko

require "faraday"

module Faraday
  class Adapter
    class NetLdap < Faraday::Adapter
      def call(env)
        # LDAP request, and call `save_response(env, status, body, headers)`
        @app.call(env)
      end
    end

janko

module MyApp
  class Application < Rails::Application
    # ...
    config.exceptions_app = self.routes

    config.action_dispatch.rescue_responses.merge!(
      "RDS::ResourceNotFound" => :not_found,
    )
    # ...
  end

janko

#!/usr/bin/env ruby
# USAGE: dive GEM_NAME
#
# Opens the lib/ directory of the specified gem in EDITOR. If you're in a Bundler
# project, it will open the locked-down version of the gem.
#
# You can supply only the first few letters of the gem, and the first gem that
# matches will be opened.

janko

source "https://rubygems.org"

gem "rspec", "~> 3.1"
gem "rspec-rails", "~> 3.1"

janko

####
# 1. Simple assertion of required arguments
####
#   - You can forget #fetch
#   - You get a better error, and always on the line where method is defined

def search(options = {})
  query = options.fetch(:query)
end
search() # => KeyError: key not found :query

janko

Movie.select(
  :year,
  "ts_headline(title,   to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS title",
  "ts_headline(plot,    to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS plot",
  "ts_headline(episode, to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS episode"
)