What is a Coderetreat?

Write perfect code, no GTD constraint

What is a Coderetreat?

Pair programming with new people all the time 

What is a Coderetreat?

Four rules of simple design
(Kent Beck):
1. TDD
2. No duplication
3. Reveal intend (naming)

4. Small

What is a Coderetreat?

Logistics:
- 25 minutes sessions
- Delete your code at the end of the session

- Small retrospective (Closing circle)

- Swap pairs.

- Start again

What is a Coderetreat?

Some other basics:

- Use any language
- Use TDD

Conway's Game of Life
 

An infinite board with cells, some dead, some alive

Given a generation of cells, calculate next generation based on simple rules

Rules of the game
 

For every cell in the universe:

Under-population: 
Any cell with fewer than two live neighbours dies

Any live cell with two or three live neighbour lives on the next generation

Overcrowding:
Any live cell with more than three live neighbours dies

Reproduction: 
Any dead cell with exactly three live neighbours becomes a live cell

Rules of the game
 

It was picked because it is too big to be finished

The domain is very rich

Mobile, Asier and Juan will be around to mock your code (in the good way)

SESSION 1

SINGLE LEVEL OF IDENTATION PER METHOD

DON'T USE ABBREVIATIONS
 

Rules of the game
 

For every cell in the universe:

Under-population: 
Any cell with fewer than two live neighbours dies

Any live cell with two or three live neighbour lives on the next generation

Overcrowding:
Any live cell with more than three live neighbours dies

Reproduction: 
Any dead cell with exactly three live neighbours becomes a live cell

SESSION 2:
OBJECT CALISTHENICS

OBJECT CALISTHENICS

1. Only One Level Of Indentation Per Method

2. Don't use ELSE

3. Wrap All Primitives And Strings

4. First Class Collections
5. One Dot Per Line
6. Don't Abbreviate
7. Keep All The Entities Small
8. No Classes With More than Two Instance Variables
9. No Getters/Setters

Rules of the game
 

For every cell in the universe:

Under-population: 
Any cell with fewer than two live neighbours dies

Any live cell with two or three live neighbour lives on the next generation

Overcrowding:
Any live cell with more than three live neighbours dies

Reproduction: 
Any dead cell with exactly three live neighbours becomes a live cell