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class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new # guest user (not logged in)
    if user.has_role? :admin # rolify
      can :manage, :all
      can :access, :ckeditor
      # Performed checks for actions:
      can [:read, :create, :destroy], Ckeditor::Picture

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{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "description": "JSON:API Schema",
  "type": "object",
  "properties": {
    "link": { "$ref": "file://schemata/link.json#" },
    "meta": { "$ref": "file://schemata/meta.json#" }
  }
}

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A collection of Linux commands and concepts I tend to forget

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Step 0. Install Docker

Step 1. For your chosen project, decide where you want to store your notebooks and files in a workingfolder.

Step 2. Open that folder in the terminal cd workingfolder

Step 3. Run this command

docker run -it --rm -v $PWD:/home/jovyan/work -p 8888:8888 jupyter/all-spark-notebook

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What

A technique for writing parsers.

Why

• Easy to understand
• Generally applicable
• Full power of the programming language at your disposal
• Declarative

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Leanstack.io list of cloud services

Analytics

• New Relic
• ScoutApp
• Librato
• Instrumental
• DataDog
• AppNeta
• Skylight.io (very alpha, invite-only)

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#!/usr/bin/env bash

install() {
  brew cask list lunchy >/dev/null || brew cask install lunchy
  pwd=$(pwd)

  reinstall_openssl
  reinstall_nginx

  cd # In case user uses gemsets, ensure we're installing powder outside of a project

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import time
import webbrowser

total_breaks = 8
break_count = 0

while (break_count < total_breaks):
	time.sleep(3600)
	webbrowser.open("https://31.media.tumblr.com/288d6e631cd930de65547ef5044fefb8/tumblr_mlksb86paT1qbuvyto1_500.gif")
	break_count = break_count + 1

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# use inverse_of to 'just work'
class User < ActiveRecord::Base
  has_many :contributions, inverse_of: :user
  has_many :posts, through: :contributions
end

class Post < ActiveRecord::Base
  has_many :contributions, inverse_of: :post
  has_many :contributors, through: :contributions,
    source: :user

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  # Finds and yields relations in batches. Adapted from record.find_in_batches since that yields
  # arrays and we want to operate on relationships.
  # Adapted from:
  #   https://github.com/rails/rails/blob/4-2-stable/activerecord/lib/active_record/relation/batches.rb#L98-L115
  def find_in_batches(target, batch_size: default_batch_size, start: nil)
    relation = target
    if logger && (target.arel.orders.present? || target.arel.taken.present?)
      logger.warn("Scoped order and limit are ignored, it's forced to be batch order and batch size")
    end
    relation = relation.reorder(target.send(:batch_order)).limit(batch_size)