[TYPO3-mvc] default state of multiple checkboxes

[Jonas Götze]

Hi list,
I have another one for you :)
I have 2 Arrays in my Template. The first one is containing fields which 
I want to render as checkboxes. These are all available options for the 
current Object.
The second Array contains those values, which are already stored for the 
object. So these options should be checked by default.
How could I do that?
I thought of creating an inArray-Viewhelper but cannot seem to nest the 
call to this in the checked-Property of a checkbox. Is there any way to 
store the result of the viewHelper-Call in a temporary variable and 
check it later?
Maybe I am thinking too complicated at all - just managed some weird 
MM-Relation stuff in the FE, so I might need a little break first...

Regards
Jonas

PS:
<f:for each="{0 : 'extbase', 1 : 'fluid'}" as="" >
	<p>Loving it more day per day!</p>
</f:for>
<b>Thanks for both of them!</b>