This project demonstrates an implementation of Conway's Game of Life using functional concepts.

You can read much more about this project in the accompanying blog post.

For a quick taster, the following snippet shows how the rules of Life are implemented within this code:

// rules of life
let liveCells = cells.filter { $0.state == .Alive }
let deadCells = cells.filter { $0.state != .Alive }

let dyingCells = liveCells.filter { livingNeighboursForCell($0) !~= 2...3 }
let newLife =  deadCells.filter { livingNeighboursForCell($0) == 3 }

// updating the world state
newLife.each { (cell: Cell) in cell.state = .Alive }
dyingCells.each { (cell: Cell) in cell.state = .Dead }