CN Coderetreat 2020 - ONLINE

Requirements

Base requirements for participating are:

• 💻 Notebook/PC
• ⚡ Stable internet connection
• 🎥 Webcam and microphone (preferably a quite place)
• ✍️ Have prepared project where you can write tests rightaway

Tools

Any participant should prepare for pairing with a developer of any platform. Therefore a couple of extra tools should be ready for use. Here is the categorized list:

Worst-Case Scenario Tools

• git (as back-up solution)

REPL and Online Tools

Does not require any installation on your local device, but be sure you have a valid account.

• codesandbox.io
  • Remote real time collaboration is described at Collaboration with Live
  • Presets available for fork:
    • Vanilla JS preset
    • TypeScript preset
    • JS + React preset
• repl.it
  • Presets available for fork:
    • Java + JUnit/Spock preset

IDE Built-In Tools

IDE	Host Participant Requirement	Guest Participant Requirements
IntelliJ IDEA (Java/Kotlin)	Installation + Code with Me Plugin	-
App Code (Swift)	Installation + Code with Me Plugin	-
VS Code (JS)	Installation + Live Share Plugin	Installation + Live Share Plugin

Agenda

Time	What is happening? 🤔
before 09:00	Participants arriving to meeting
09:00 - 09:30	Welcome, introduction and overview of what is going to happen
09:30 - 10:30	Session # 1 (Pair Programming and Game of Life explained)
10:30 - 10:45	Retrospective + short break
10:45 - 11:45	Session # 2 (Test Driven Development explained)
11:45 - 12:00	Retrospective
12:00 - 13:15	Lunch + socializing (big break) 🍕
13:15 - 14:15	Session # 3 (4 Rules of Simple Design explained)
14:15 - 14:30	Retrospective + short break
14:30 - 15:30	Session # 4
15:30 - 15:45	Retrospective + short break
15:45 - 16:45	Session # 5
16:45 - 17:00	Closing circle retrospective

Sessions

Session # 1

Participant A	Participant B	Pair Space
Mária	Lucia	meeting room + paper
Vojtěch	Lukáš	meeting room + paper
Jozef	Adam	meeting room + paper
Viktor	Daniel	meeting room + paper
Tomáš	Michal	meeting room + paper

Rules:

• Game of Life

Session # 2

Participant A	Participant B	Pair Space
Daniel	Lukáš	meeting room + paper
Adam	Viktor	meeting room + paper
Vojtěch	Lucia	meeting room + paper
Michal	Mária	meeting room + paper
Tomáš	Jozef	meeting room + paper

Rules:

• Game of Life
• TDD - ping-pong
• max 4 lines of code per method/function

Session # 3

Participant A	Participant B	Pair Space
Tomáš	Viktor	meeting room + paper
Lucia	Michal	meeting room + paper
Lukáš	Mária	meeting room + paper
Daniel	Jozef	meeting room + paper
Vojtěch	Adam	meeting room + paper

Rules:

• Game of Life
• TDD - ping-pong
• 4 Rules of Simple Design
• TDD as if you meant it

Session # 4

Participant A	Participant B	Pair Space
Lukáš	Jozef	meeting room + paper
Daniel	Michal	meeting room + paper
Viktor	Vojtěch	meeting room + paper
Adam	Lucia	meeting room + paper
Tomáš	Mária	meeting room + paper

Rules:

• Game of Life
• TDD - navigator-drive
• 4 Rules of Simple Design
• no arrays/collections

Session # 5

Participant A	Participant B	Pair Space
Vojtěch	Mária	meeting room + paper
Daniel	Lucia	meeting room + paper
Tomáš	Lukáš	meeting room + paper
Viktor	Jozef	meeting room + paper
Michal	Adam	meeting room + paper

Rules:

• Game of Life
• TDD - ping-ping
• 4 Rules of Simple Design
• mute
• immutables only

Game of Life

For more information visit the Conway's Game of Life page at Wikipedia.

Rule # 1

Any live cell with fewer than two live neighbors dies, as if by underpopulation.

generation x (n < 2)

⬜	⬜	⬜
⬜	🦠	⬜
⬜	⬜	🦠

generation x + 1

❔	❔	❔
❔	⬜	❔
❔	❔	❔

Rule # 2

Any live cell with two or three live neighbors lives on to the next generation.

generation x (n = 2,3)

⬜	⬜	⬜
🦠	🦠	⬜
⬜	🦠	🦠

generation x + 1

❔	❔	❔
❔	🦠	❔
❔	❔	❔

Rule # 3

Any live cell with more than three live neighbors dies, as if by overpopulation.

generation x (n > 3)

🦠	🦠	🦠
🦠	🦠	🦠
🦠	🦠	🦠

generation x + 1

❔	❔	❔
❔	⬜	❔
❔	❔	❔

Rule # 4

Any dead cell with exactly three live neighbors becomes a live cell, as if by reproduction.

generation x (n = 3)

⬜	⬜	⬜
🦠	⬜	⬜
⬜	🦠	🦠

generation x + 1

❔	❔	❔
❔	🦠	❔
❔	❔	❔

4 Rules of Simple Design

Consists of:

1. Tests Pass
2. Expresses Intent
3. No Duplication
4. Small

Further reading - Corey Haines: Understanding the Four Rules of Simple Design.