jtjobe

Video Summary

This video is a technical presentation on concurrency and multithreading, focusing on advanced students preparing for capstone projects or job interviews. Here's a concise summary:

1. Introduction and Purpose:

   • The talk is aimed at advanced students or those preparing for job interviews due to the relevance of concurrency and multithreading in these contexts.
   • All students are welcome to join and ask questions.

2. Key Takeaways:

• Understanding the differences between processes and threads.

jtjobe

# app/models/current.rb
class Current < ActiveSupport::CurrentAttributes
  attribute :account, :user
  attribute :request_id, :user_agent, :ip_address

  resets { Time.zone = nil }

  def user=(user)
    super
    self.account = user.account

jtjobe

# app/models/current.rb
class Current < ActiveSupport::CurrentAttributes
  attribute :request_id
end

#####################################################

# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  before_action :set_request_id

jtjobe

# First, define a Current class that inherits from ActiveSupport::CurrentAttributes
class Current < ActiveSupport::CurrentAttributes
  attribute :foo
end

# Set the value
Current.foo = "bar"

# Retrieve the value
puts Current.foo  # Output: bar

jtjobe

<div id="traffic-chart" class="c3" style="max-height: 100px; position: relative;">
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            <rect x="-31" y="-20" width="637" height="28"></rect>
         </clipPath>
         <clipPath id="c3-1684282110701-clip-yaxis">

jtjobe

<div id="traffic-chart" class="c3" style="max-height: 100px; position: relative;">
   <svg style="overflow: hidden;" width="600" height="100">
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         </clipPath>
         <clipPath id="c3-1684281192096-clip-yaxis">

jtjobe

sports = %w{ football soccer basketball baseball volleyball }

case sports.sample
  when 'football' then puts "touchdown"
  when 'soccer' then puts "goal"
  when 'basketball' then puts "basket"
  when 'baseball' then puts "run"
  when "volleyball" then puts "point"
end

jtjobe

sports = %w{ football soccer basketball baseball volleyball }

case sports.sample
  when 'football'
    puts "touchdown"
  when 'soccer'
    puts "goal"
  when 'basketball'
    puts "basket"
  when 'baseball'

jtjobe

sports = %w{ football soccer basketball baseball volleyball }

game = sports.sample

if game == 'football'
  puts "touchdown"
elsif game == 'soccer'
  puts "goal"
elsif game == 'basketball'
  puts "basket"

jtjobe

if @cancelling_party.role == 'tutor'
  desc = "Refund for Cancelled Appointment | Cancelled by TUTOR at #{DateTime.now.strftime('%l:%M %p on %-m-%-d-%Y')} | Tutor: #{@tutor.full_name} | Student: #{@student.full_name} | Appointment ID: #{@appt.id}"
  Processor::Stripe.new.issue_refund(@stripe_charge_id, @refund_amount, desc)
  refund_status = "Appointment was succesfully cancelled and a refund to the student was initiated. Please be sure to account for a withdrawal of $#{display_full_price(@refund_amount)} from your bank account if you have already received the funds."
else
  # cancelled by Student, so appt must be more than 24 hrs away to recieve refund
  hours_before_appt = ((@appt.start_time.to_time - Time.now) / 1.hour)
  if hours_before_appt >= 24
    desc = "Refund for Cancelled Appointment | Cancelled by STUDENT at #{DateTime.now.strftime('%l:%M %p on %-m-%-d-%Y')} | Tutor: #{@tutor.full_name} | Student: #{@student.full_name} | Appointment ID: #{@appt.id}"
    Processor::Stripe.new.issue_refund(@stripe_