2023 Day 10 Complete!

helpers/coordinate.go

@@ -184,3 +184,12 @@ func GetHighestX(list ...Coordinate) int {
 	}
 	return top
 }
+
+func CoordListContains(needle Coordinate, haystack []Coordinate) bool {
+	for _, chk := range haystack {
+		if chk.Equals(needle) {
+			return true
+		}
+	}
+	return false
+}