How to change a property of an object in an array list

[Kelteseth]

Hi Qt Hackers
in this example ( http://harmattan-dev.nokia.com/docs/library/html/qt4/declarative-tutorials-samegame-samegame2.html ) an array is used to store the objects of the gamefield. When they restart the game all the objects going to be deleted. My question is: Is there a way to change the properties of an single oject in this array? I've tried this:
@board[0].visible = false@

But all I get is a type error: Cannot set property "visible" of undefined

Thanks
Eli

[daliusd]

Maybe that will give you some hints. This is output from node.js but javascript is javascript. Actually download node.js and try to play around with it a little bit:

@> a = new Array(10)
[ , , , , , , , , , ]

a[0]
undefined
a[0].visible
TypeError: Cannot read property 'visible' of undefined
at repl:1:6
at REPLServer.eval (repl.js:80:21)
at Interface.<anonymous> (repl.js:182:12)
at Interface.emit (events.js:67:17)
at Interface._onLine (readline.js:162:10)
at Interface._line (readline.js:426:8)
at Interface._ttyWrite (readline.js:603:14)
at ReadStream.<anonymous> (readline.js:82:12)
at ReadStream.emit (events.js:88:20)
at ReadStream._emitKey (tty.js:327:10)
a[0] = {visible: 'hi'}
{ visible: 'hi' }
a[0].visible
'hi'
a[0].visible = 'bye'
'bye'
a[0].visible
'bye'
@