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First:

brew update
brew tap elastic/tap
brew install elastic/tap/elasticsearch-full

Then to start the service:

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;; This is a collection of code that surprised me.

;; 
;; Example 1
;;
(let [counter (atom 0)
      coll [(swap! counter inc)]]
  [(take 1 coll) @counter])
;;=> [(1) 1]

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1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz

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Feature flags

To show a feature to a subset of users, use feature flags.

Feature flags can be configured from Active Admin:

Just add the emails of the people you want to see a given feature to that feature flag's array of emails, like so:

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What is Bundler?

• It’s the canonical package manager for Ruby
• Works hand-in-hand with RubyGems
• Bundler + RubyGems is kind of like:
  • Virtualenv + Pip for Python
  • NPM for NodeJS
  • Leiningen for Clojure

Quiz 1: How many lines of code in Bundler?

A)   3,921

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from __future__ import print_function

import json
import urllib
import boto3
import psycopg2
import re

s3 = boto3.client('s3')