some kotlin adjustments

src/main/kotlin/Loader.kt

@@ -27,7 +27,7 @@ public class Loader : JavaPlugin(), Listener, CommandExecutor {
     @EventHandler
     public fun joinEvent(event: PlayerJoinEvent) {
         event.joinMessage = "§2>>§7 " + event.player.displayName
-        var players = Bukkit.getOnlinePlayers()
+        val players = Bukkit.getOnlinePlayers()
         for (p in players) {
             event.player.sendMessage("Currently there are " + players.size + " players online!")
         }
@@ -52,19 +52,14 @@ public class Loader : JavaPlugin(), Listener, CommandExecutor {
                 }
                 "permissions" -> {
                     if (args.isEmpty()) {
-                        for (perm in sender.effectivePermissions) {
-                            sender.sendMessage(perm.permission)
-                        }
-                    }
-                    else {
-                        var name = args[0]
-                        for (p in server.onlinePlayers) {
-                            if (p.name == name) {
-                                for (perm in p.effectivePermissions) {
-                                    sender.sendMessage(perm.permission)
-                                }
-                            }
+                        sender.effectivePermissions.forEach {
+                            sender.sendMessage(it.permission)
                         }
+                    } else {
+                        val name = args[0]
+                        server.onlinePlayers
+                                .filter { it.name == name }
+                                .firstOrNull()?.effectivePermissions?.forEach { sender.sendMessage(it.permission) }
 
                     }
                 }