CS 100 :: Spring 2025 :: In-Class Links

This is where Dave will be posting links to content used within the lectures and assignments.

A † indicates that it was not shown in class, but you may want to check it out if you're interested (you are not required to).

Lecture 23 (Tuesday July 29, 2025) [optional lecture]

• No VEVOX today!
  
• Realtime BTC transactions
  https://www.blockchain.com/explorer/mempool/btc
• Online MD5 Hash Generator
  https://www.md5hashgenerator.com/
• NFT Dave bought for CS 100
  https://wax.atomichub.io/explorer/asset/1099938649723
• TOR Browser
  https://www.torproject.org/download/

Lecture 22 (Thursday July 24, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/476198556
• This person does not exist
  https://thispersondoesnotexist.com/

Lecture 21 (Tuesday July 22, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/493891376
• Visualization of the Enigma Machine
  YouTube
• Visualization of AES
  YouTube
• Online MD5 Hash Generator
  https://www.md5hashgenerator.com/
• Modular Exponentiation
  https://planetcalc.com/8977/

Extra Content

• Dave's Spreadsheet Examples for working with Arrays
  s25-dave-array-examples.xlsx (right-click save as)

Lecture 20 (Thursday July 17, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/404830431
• Spreadsheet for today
  cs100-in-class-July-17-2025.xlsx (right-click save as)

Lecture 19 (Tuesday July 15, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/404510237
• Spreadsheet for today
  cs100-in-class-July-15-2025.xlsx (right-click save as)

Lecture 18 (Thursday July 10, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/415534968
• Spreadsheet for today
  cs100-in-class-July-10-2025.xlsx (right-click save as)

Lecture 17 (Tuesday July 08, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/488239617
• Spreadsheet for today
  cs100-in-class-July-08-2025.xlsx (right-click save as)

Lecture 16 (Thursday June 26, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/478324016
• Spreadsheet for today
  cs100-in-class-June-26-2025.xlsx (right-click save as)

Lecture 15 (Tuesday June 24, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/423945373
• Spreadsheet for today
  cs100-in-class-June-24-2025.xlsx (right-click save as)

Note: Lecture 14 was Q&A

Lecture 13 (Tuesday June 17, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/434013984

Assignment 2

• Quiz Template:
  quiz.html

Lab 5

• Starter lab file:
  lab-quiz.html (you may want to right-click save as...)

Lecture 12 (Thursday June 12, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/494713091
• What HTTP header is my browser sending?
  https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending
• CS 100 Counter (with cookies):
  https://student.cs.uwaterloo.ca/~cs100/count/
• Chrome Browser Cookies
  chrome://settings/cookies
• Google Ad Center
  https://myadcenter.google.com
  https://myadcenter.google.com/controls
• Your Battery Level
  battery.html
• UW Weather:
  http://weather.uwaterloo.ca/waterloo_weather_station_data.xml
• Background communication example
  ajax.html
• Cookie Clicker (just for fun)†
  https://orteil.dashnet.org/cookieclicker/

Lecture 11 (Tuesday June 10, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/495977185
• What HTTP header is my browser sending?
  https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending
• Scratch:
  scratch.mit.edu
• Alert:
  alert.html
• Today:
  today.html
• Count:
  count.html
• Boxes:
  boxes.html
• Lights:
  https://helloenjoy.itch.io/lights

Lab 4 (Friday June 6, 2025)

• L4Q1.html
• L4Q2.html
• L5preview.html

Lecture 10 (Thursday June 5, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/482491682
• CSS Validator
  https://jigsaw.w3.org/css-validator/
• Dave's live demo page
  https://student.cs.uwaterloo.ca/~cs100/demo/
• W3 Schools (CSS)
  https://www.w3schools.com/css/
• Google Fonts
  https://fonts.google.com/knowledge
• Font Fallbacks
  https://www.w3schools.com/css/css_font_fallbacks.asp
• Free book on fonts (provided by google)†
  Stop Stealing Sheep
• Classic Great Gatsby meme
  meme

Lecture 09 (Tuesday June 3, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/460827461
• Classic Great Gatsby meme
  meme

Lab 3

• gorilla.png
• uw-banner.jpg

Lecture 08 (Thursday May 29, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/401914092
• HTML Validator
  https://validator.w3.org/
• For Dave to cut & paste: I ❤️ Beyoncé!

Lecture 07 (Tuesday May 27, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/492533207
• W3 Schools (HTML)
  https://www.w3schools.com/html/

Lecture 06 (Thursday May 22, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/419273979
• How to write a postcard
  https://www.wikihow.com/Write-a-Postcard
• What HTTP header is my browser sending?
  https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending

Lecture 05 (Tuesday May 20, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/406994890
• Interactive example of a vector graphic:
  https://www.desmos.com/calculator/cahqdxeshd

Lecture 04 (Thursday May 15, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/478042224
• Example of an annoying URL with a space in it (note the %20 and how a space in ASCII is #20):
  https://student.cs.uwaterloo.ca/~cs100/links/this%20URL%20has%20spaces%20in%20it.txt
• Hiding a URL by using the (Hex) ASCII codes:
  https://%75%77%61%74%65%72%6C%6F%6F%2E%63%61
• Scene from the movie The Martian:
  YouTube
  † Fun retro fact! The Martian scene mentions the game: Leather Goddesses of Phobos from 1986. You can play it online here.
• Unicode Emoji list:
  https://www.unicode.org/emoji/charts/emoji-list.html
• † xkcd joke on combining emojis:
  https://xkcd.com/1813/
• Look up your Waterloo faculty colour by Hex Code:
  https://uwaterloo.ca/brand/how-express-our-brand/colour
• † images that contain all 2²⁴ colours:
  https://allrgb.com/

Lecture 03 (Tuesday May 13, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/403260593
• † Fun Stereogram
  Gorilla

Lecture 02 (Thursday May 8, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/456397634
• † Powers of 10 (going from high level to low level):
  YouTube
• † Babbage's Difference Engine (what a mechanical machine that uses 10 digits might look like)
  YouTube

Lecture 01 (Tuesday May 6, 2025)

• Course Outline:
  https://outline.uwaterloo.ca/viewer/view/nwk3kw
• Join the VEVOX session
  https://vevox.app/#/m/416293147
• † Challenge Dave to a game on Board Game Arena (Dave's username: Dave Tompkins)
  boardgamearena.com
  (but only if you're keen -- there are no "bonus" / participation points)

Assignment Zero