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/*
********************************************************************************
Golang - Asterisk and Ampersand Cheatsheet
********************************************************************************

Also available at: https://play.golang.org/p/lNpnS9j1ma

Allowed:
--------
p := Person{"Steve", 28} 	stores the value

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var util = require('util'),
    http = require('http'),
    events = require('events');

var Twitter = function(opts) {
    this.username = opts.username;
    this.password = opts.password;
    this.track = opts.track;
    this.data = '';
};

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$ echo 'gem "webpacker"' >> Gemfile
$ bundle install
$ rails webpacker:install
$ yarn add bootstrap@4.0.0-beta jquery popper.js

diff --git a/config/webpack/environment.js b/config/webpack/environment.js
index d16d9af..86bf1a7 100644

trivektor

Installing Cassandra on Mac OS X

Install Homebrew

Homebrew is a great little package manager for OS X. If you haven't already, installing it is pretty easy:

ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

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Latency Comparison Numbers
--------------------------
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

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// ES6 w/ Promises
// Note: From a React starter template - see https://t.co/wkStq8y3I5
function fetchData(routes, params) {
  let data = {};

  return Promise.all(routes
    .filter(route => route.handler.fetchData)
    .map(route => {
      return route.handler.fetchData(params).then(resp => {
        data[route.name] = resp;

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{
    "AL": "Alabama",
    "AK": "Alaska",
    "AZ": "Arizona",
    "AR": "Arkansas",
    "CA": "California",
    "CO": "Colorado",
    "CT": "Connecticut",
    "DE": "Delaware",
    "FL": "Florida",

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# Run from 'rails console'
# Example cookie value. To find in Chrome: Inspect > Resources > Cookies
cookie = "cEJPOHAwUXdmMS9HK3gyVVYyNVR2QU03Q0ZhclZYNmRrN3RoelhrenQ3ZVhsSEtOTytQR29aZG1ZZWZmK254Y01QM2hyTVZMNlFOcWNCRytzM0pac0hpbFVWTUoxZEVicEZERXIzbEJENkJ4QVBZcDQyM24rclQxbnRFeXpkMVRicTdGMkVSU2F1U0FVcEdiYVBsRVFveThlMndPdDBlaThVVkl4TkFreUc0PS0tRFFmdlFzQnkrSmROT1ZNdnpjcnA4Zz09--3bf330ec809351525bd9df2c905a81a3bcc93c81"
# Example secret_key_base found in config/secrets.yml
secret_key_base = "df3def2698eb651febcb5ca64c3203a3cb3ff988e7ee5c4fd66135a24ddf5009ae0f95dee1e1d2e443538e647178f0cd87acc98d1082659bb03d89b8af1f2252"
key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000) 
secret = key_generator.generate_key("encrypted cookie")
sign_secret = key_generator.generate_key("signed encrypted cookie")
encryptor = ActiveSupport::MessageEncryptor.new(secret, sign_secret, serializer: ActiveSupport::MessageEncryptor::NullSerializer)
puts encryptor.decrypt_and_verify(URI.unescape(cookie))

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    require 'bundler/capistrano'
    require 'capistrano_colors'
    load 'deploy/assets'

    # ssh forwarding and shell
    set :default_run_options, { :pty => true }
    set :ssh_options, { :forward_agent => true }

    set :scm_verbose, true
    set :scm, :git

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Alphasights Technical Challenge

Using Ruby on Rails we would like you to create a simple expert search tool. The application should fulfill the requirements below. The source code must be placed in a public repo on GitHub. The application should be deployable on Heroku.

• I enter a name and a personal website address and a member is created.
• When a member is created, all the heading (h1-h3) values are pulled in from the website to that members profile.
• The website url is shortened (e.g. using http://goo.gl)
• After the member has been added, I can define their friendships with other existing members. Friendships are bi-directional i.e. If David is a friend of Oliver, Oliver is always a friend of David as well.
• The interface should list all members with their name, short url and the number of friends e.g. Alan http://goo.gl/3io1P (3)