Flagging up the command-line interface

and using unicode chars instead of X and _, dangit!

conway/go/conways-game-of-life/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"flag"
 	"fmt"
 	"os"
 	"time"
@@ -10,18 +11,29 @@ import (
 	. "github.com/meatballhat/box-o-sand/conway/go"
 )
 
+var (
+	height  = flag.Int("height", 40, "Game height")
+	width   = flag.Int("width", 80, "Game width")
+	sleepMs = flag.Int("sleep.millis", 200,
+		"Millisecond sleep interval per generation")
+)
+
 func main() {
-	game := NewGameOfLife(40, 40)
+	flag.Parse()
+
+	game := NewGameOfLife(*height, *width)
 	err := game.ImportRandomState()
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "WHAT IN FAIL?: %v\n", err)
 		os.Exit(2)
 	}
 
-	ticks := time.Tick(1 * time.Second)
+	ticks := time.Tick(time.Duration(*sleepMs) * time.Millisecond)
+	generations := 0
 	for now := range ticks {
-		fmt.Printf("\n\n%v\n", now)
+		fmt.Printf("\nGeneration %v\n%v\n", generations, now)
 		fmt.Println(game)
 		game.EvaluateGeneration()
+		generations++
 	}
 }

conway/go/game_of_life.go

@@ -210,7 +210,7 @@ func (state *GameState) String() string {
 	for y := 0; y < height; y++ {
 		var cells []string
 		for x := 0; x < width; x++ {
-			stringVal := "X"
+			stringVal := "Φ"
 
 			value, err := state.Get(x, y)
 			if err != nil {
@@ -218,7 +218,7 @@ func (state *GameState) String() string {
 			}
 
 			if value == 0 {
-				stringVal = "_"
+				stringVal = "·"
 			}
 			cells = append(cells, stringVal)
 		}