CS 100 :: Fall 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 24 (Tuesday December 2, 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 23 (Thursday November 27, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/404001759
• Reinforcement learning to play pokemon
  YouTube
• This person does not exist
  https://thispersondoesnotexist.com/
• Stable Diffusion Demo
  https://poloclub.github.io/diffusion-explainer/
• AlphaGo - The Movie†
  YouTube
  

Lecture 22 (Tuesday November 25, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/456410333

Lecture 21 (Thursday November 20, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/438102892
• Caesar Cipher
  https://cryptii.com/pipes/caesar-cipher
• Vigenère Cipher
  https://www.cs.du.edu/~snarayan/crypt/vigenere.html
• Visualization of the Enigma Machine
  YouTube
• Interactive Engima Machine
  https://www.101computing.net/enigma-machine-emulator/
• Visualization of AES
  YouTube
• Online MD5 Hash Generator
  https://www.md5hashgenerator.com/
• Modular Exponentiation tool
  https://planetcalc.com/8977/
• Public/Private Key tool
  https://www.devglan.com/online-tools/rsa-encryption-decryption

Lecture 20 (Tuesday November 18, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/402814294
• Google Advanced Search
  https://www.google.com/advanced_search

Assignment 4

• Quiz Template:
  quiz.html

Lecture 19 (Thursday November 13, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/406787596
• Chrome Browser Cookies
  chrome://settings/cookies
• Google Ad Center
  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 (Throwback Thursdays)†
  https://orteil.dashnet.org/cookieclicker/
• Browser Extension Example
  waterpoo.zip
  
  • Download and extract the ZIP
  • Go to chrome://extensions/
  • Turn on Developer mode
  • Click Load unpacked
  • Select the unzipped folder

Lecture 18 (Tuesday November 11, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/487220664
• What HTTP header is my browser sending?
  https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending
• Alert:
  alert.html
• Today:
  today.html
• Count:
  count.html
• Boxes:
  boxes.html
• Lights:
  https://helloenjoy.itch.io/lights
• CS 100 Counter (with cookies):
  https://student.cs.uwaterloo.ca/~cs100/count/

Lecture 17 (Thursday November 6, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/428414015
• W3 Schools (CSS)
  https://www.w3schools.com/css/
• CSS Validator
  https://jigsaw.w3.org/css-validator/
• 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

Lecture 16 (Tuesday November 4, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/437465050
• W3 Schools (CSS)
  https://www.w3schools.com/css/

Lecture 15 (Thursday October 30, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/415700032
• W3 Schools (HTML)
  https://www.w3schools.com/html/
• HTML Validator
  https://validator.w3.org/
• For Dave to cut & paste: I ❤️ Beyoncé!

Lecture 14 (Tuesday October 28, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/448889606
• W3 Schools (HTML)
  https://www.w3schools.com/html/
• HTML Validator
  https://validator.w3.org/

Lecture 13 (Thursday October 23, 2025)

• No links today — Review Q & A

Lecture 12 (Tuesday October 21, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/425634423
• 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
• 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 11 (Thursday October 09, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/489574278
• 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.

Lecture 10 (Tuesday October 07, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/448199900
• † Babbage's Difference Engine (what a mechanical machine that uses 10 digits might look like)
  YouTube

Lecture 09 (Thursday October 02, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/485315735
• Spreadsheet for today
  cs100-in-class-October-02-2025.xlsx (right-click save as)
• Spreadsheet of array examples
  cs100-f25-array-examples.xlsx (right-click save as)

Assigned Readings

• https://www.atlassian.com/data/charts/essential-chart-types-for-data-visualization
• https://www.atlassian.com/data/charts/how-to-choose-data-visualization

Lecture 08 (Tuesday September 30, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/456639945
• Spreadsheet for today
  cs100-in-class-September-30-2025.xlsx (right-click save as)

Lecture 07 (Thursday September 25, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/460053790
• Spreadsheet for today
  cs100-in-class-September-25-2025.xlsx (right-click save as)

Lecture 06 (Tuesday September 23, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/450357545
• Spreadsheet for today
  cs100-in-class-September-23-2025.xlsx (right-click save as)

Lecture 05 (Thursday September 18, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/477791965
• Spreadsheet for today
  cs100-in-class-September-18-2025.xlsx (right-click save as)
• Meme from last day

Lecture 04 (Tuesday September 16, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/433520490
• Spreadsheet for today
  cs100-in-class-September-16-2025.xlsx (right-click save as)

Lecture 03 (Thursday September 11, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/474808909
• Show My IP
  https://www.showmyip.com/
• HTTP Only website
  http://httpforever.com/
  http://146.190.62.39/
  
• TCP port numbers
  https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
• What HTTP header is my browser sending?
  https://www.whatismybrowser.com/detect/what-http-headers-is-my-browser-sending

Lecture 02 (Tuesday September 9, 2025)

• Join the VEVOX session
  https://vevox.app/#/m/449689646
• How to write a postcard
  https://www.wikihow.com/Write-a-Postcard

Assignment Zero

• The secret word is: Dolphin
• For a secret double bonus on Assingment Zero, check out this video.

Lecture 01 (Thursday September 4, 2025)

• Course Outline:
  https://outline.uwaterloo.ca/viewer/view/nmppvu
• Join the VEVOX session
  https://vevox.app/#/m/484435344
• † 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)