eliotsykes

#!/bin/sh

# Create this file in the bin/ directory of your
# Rails app.

# Run this script to deploy the app to Heroku.

set -e

# Push changes to Heroku

eliotsykes

# Copy NaiveHash (end of this file) and rename to RubyHash.
#
# Try using RubyHash in irb/pry and store some data in it
# and notice it has problems with remembering all of your data due
# to RubyHash not handling hash collisions:
#
# require_relative 'ruby_hash'
# h = RubyHash.new
# ('a'..'z').each do |char|
#   h[char] = char.upcase

gshutler

#! /usr/bin/env bash

set -e

eval "$(rbenv init -)"

for version in `rbenv whence gem`; do
  rbenv shell "$version"
  echo "Updating rubygems for $version"
  gem update --system --no-document --quiet

pixeltrix

When should you use DateTime and when should you use Time?

It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:

>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000

hpjaj

## From Lynda.com course 'RSpec Testing Framework with Ruby'

describe 'Expectation Matchers' do
  
  describe 'equivalence matchers' do

    it 'will match loose equality with #eq' do
      a = "2 cats"
      b = "2 cats"
      expect(a).to eq(b)

iamatypeofwalrus

Why?

Atom can automagically picks up any tags file in your current directory which enables you to:

• shift+cmd+r search for any function in your project
• alt+cmd+down GoTo a function declaration

How

Get brew if you don't already have it. Then:

brew install ctags

pixeltrix

require 'openssl'

class MessageEncryptor
  class << self
    include OpenSSL

    def delivering_email(message)
      encrypted_message = sign_and_encrypt(message.encoded, message.to)
      overwrite_body(message, encrypted_message)
      overwrite_headers(message, encrypted_message)

BattleBrisket

Rails changed the default behavior for WEBrick somewhere around version 4. Instead of binding to 0.0.0.0, it will now default to localhost.

This makes life difficult when you're running Rails inside a VM like Vagrant, mostly because it won't work. ;)

Fortunately, you can force Rails back into the old universal address with the following snippet

# config/boot.rb

# ... end of existing file

eliotsykes

// Wrap in anonymous function to avoid adding variables to global scope needlessly.
(function($) { // $ is jQuery

  function addTodoToDOM(data) { // 'data' is object built from response JSON
    
    // id will be needed when adding delete functionality dynamically.
    // var todoId = data.todo.id;
    
    // Add HTML for new todo to document
    var tableRow = '<tr><td>' + data.todo.description + '</td></tr>';

eliotsykes

Capybara Options Hash (options) for all, find:

• text (String, Regexp) — Only find elements which contain this text or match this regexp
• visible (Boolean, Symbol) — Only find elements with the specified visibility:
  • true - only finds visible elements.
  • false - finds invisible and visible elements.
  • :all - same as false; finds visible and invisible elements.
  • :hidden - only finds invisible elements.
  • :visible - same as true; only finds visible elements.
• count (Integer) — Exact number of matches that are expected to be found