Conway's Game of Life in CoffeeScript
willbailey.name
willbailey.name
Docco always impresses too, eh?
I really like the use of:
this[key] = value for key, value of options
I'm going to use that for sure :)
I personally like code like this:
countNeighbors: (cell) ->
neighbors = 0
neighbors += @isAlive cell.row+x, cell.col+y for x in [-1..1] when x || y for y in [-1..1]
neighbors
isAlive: (row, col) -> if @world[row] and @world[row][col] and @world[row][col].live then 1 else 0
@jashkenas can you fix [-10..10] (constant boundary) loops to not check for increasing/decreasing :) I can't think of an edge case that breaks it.
But to be honest, I hate code that tries to do 5 bits of logic on one 100-character-long line, instead of just breaking into two more readable lines. [Edit: looks like that was fixed in the version at http://willbailey.name/conway/docs/conway.html]
Also, can’t your isAlive function look like:
isAlive: (row, col) -> @world[row]?[col]?.liveYes, range comprehensions were recently optimized to remove direction-checking when possible. On CoffeeScript master ...
x for x in [-10..10]
var x;
for (x = -10; x <= 10; x++) {
x;
}
cell.live = false if count < 2 or count > 3
cell.live = true if count == 3
cell.live = count < 2 or count > 3
cell.live = count == 3
if a == true:
return true
else:
return false
return a // Agreed that a could be a "truth" value without being the real "true". Still:
return !!a // With a hack cell.live = count is 3
cell.live = count == 3 if count != 2What should happen is that, if count is 3, then cell.live becomes true. If count is 2, then cell.live retains its previous value. For all other values of count, cell.live becomes false.