Unit 2, Day 7

Agenda

1. Warm-up: Name That Error — an index off the edge of a grid
2. The neighbour problem: every cell looks at its neighbours, and the edges have fewer. Write the bounds check once, properly
3. Build: a flood fill or a game-of-life step, in pairs

Things to do before our next class

• Journal: how you handled the edges, and what you rejected.