JFernandezWM

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

JFernandezWM

# place this in lib/fakeout.rb

require 'ffaker'

module Fakeout
  class Builder

    FAKEABLE = %w(User Product)

    attr_accessor :report

JFernandezWM

Building custom ruby-alpine

Check the alpine version of the previous image.

alpine3.9 master$ docker run -it ruby:2.5.4-alpine sh
/ # cat /etc/alpine-release 
3.9.2
/ # ruby -v
ruby 2.5.4p155 (2019-03-13 revision 67245) [x86_64-linux-musl]

JFernandezWM

/*
In the node.js intro tutorial (http://nodejs.org/), they show a basic tcp 
server, but for some reason omit a client connecting to it.  I added an 
example at the bottom.

Save the following server in example.js:
*/

var net = require('net');

JFernandezWM

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

JFernandezWM

Inspired by dannyfritz/commit-message-emoji

See also gitmoji.

Commit type	Emoji
Initial commit	🎉 :tada:
Version tag	🔖 :bookmark:
New feature	✨ :sparkles:
Bugfix	🐛 :bug:

JFernandezWM

Open in Sublime Text

• Open Automator
• Create a new Service
• Set “Service receives selected” to files or folders in any application
• Add a Run Shell Script action
• Set the script action to /Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl -n "$@"
• Set “Pass input” to as arguments
• Save as Open in Sublime Text

JFernandezWM

puma (3.11.4)
rails 5.2.0
ruby 2.5
dockerized environment
My puma.rb:

# Puma can serve each request in a thread from an internal thread pool.
# The `threads` method setting takes two numbers: a minimum and maximum.
# Any libraries that use thread pools should be configured to match
# the maximum value specified for Puma. Default is set to 5 threads for minimum

JFernandezWM

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

JFernandezWM

AllCops:
  TargetRubyVersion: 2.4.1
  Exclude:
    - "vendor/**/*"
    - bin/*
Layout/DotPosition:
  Description: Checks the position of the dot in multi-line method calls.
  StyleGuide: https://github.com/bbatsov/ruby-style-guide#consistent-multi-line-chains
  Enabled: true
  EnforcedStyle: leading