Partial solution for 10.1. We've got grouping, but still need sorting and some printing cleanup.

2018/day10-1.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+
+	"internal/day10"
+	"internal/util"
+)
+
+func main() {
+	data := util.ReadInput()
+	points := day10.ParseInput(data)
+
+	i := 0 // debug
+	for {
+		for _, point := range points {
+			point.Move()
+		}
+
+		groups := day10.GroupPoints(points)
+		if groups != nil {
+			for _, group := range groups {
+				day10.DrawPoints(group)
+				fmt.Println()
+			}
+			return
+		}
+
+		// debug
+		i++
+		if i > 100000 {
+			fmt.Println("oops")
+			return
+		}
+		// end debug
+	}
+}