hasEventListeners( SymbolEventName )
dispatchEvent( SymbolEventName, args )

JavaScript Garbage Collection

The JavaScript Interpreter (SpiderMonkey) remembers everything, until 8MB of system memory are used. Then it starts to collect garbage. With the method gc() you can force garbage collection anytime.

// JavaScript-Syntax
_system.gc();

so if you want to avoid this “temporary leak” in your sample code above, you could call _system.gc() e.g. after every 10000 frames.

Cheers,
Valentin

-- parent script "Bullet"
property _speed
property _type

on new me, aType
  if (aType<> 5.45 AND aType<>7.62) then
    _player.alert( "The property 'type' can accept only values 5.45 and 7.62" )
    _movie.halt()
  end if
  me._type = aType
  return me
end

on setAt me, p, v
  --put "setAt", p, v
  case p of
    #speed:
      if (v<=0) then
        _player.alert( "Error: The property 'speed' can accept only values greater than 0." )
        _movie.halt()
      end if
    otherwise:
      _player.alert( "Error: The property '"&p&"' has no setter" )
      _movie.halt()
  end case
  me.setProp("_"&p, v)
end

on getAt me, p
  --put "getAt", p
  return me.getProp("_"&p)
end

-- test in message window
myBullet = script( "Bullet" ).new( 3.5 )  -- "Error: The property 'type' can accept only values 5.45 and 7.62"
myBullet = script( "Bullet" ).new( 5.45 ) -- OK
myBullet[#type] = 7.62                    -- "Error: The property 'type' has no setter"
trace( myBullet[#type] )                  -- 5.4500
myBullet[#speed] = 1200                  -- OK
trace( myBullet[#speed] )                -- 1200
myBullet[#speed] = -10                    -- "Error: The property 'speed' can accept only values greater than 0."

Cheers,
Valentin