[flexcoders] double check that this Switch statement can't work...

[Nick Middleweek]

Hi,

I was hoping I could use a switch statement to test what Object type is
selected on my ADG but I don't think it's possible and need to use an if,
else if, chain...

if ( orgStructureADG.selectedIndex = 0 )
  {
switch ( orgStructureADG.selectedItem )
{
   case VendorCompcodeData:
   {
 trace( VendorCompcodeData );
   }

   case VendorPurchorgData:
   {
 trace( VendorPurchorgData );
   }

   default:
   {
 trace( default )
   }
}
  }


I can't drop in the is statement. Is this right, or am I going mad? :)


Cheers,
Nick

Re: [flexcoders] double check that this Switch statement can't work...

[Oleg Sivokon]

In AS3 switch construction uses break - otherwise it'll fall through (all
cases will be executed after the first case that matches the condition).
Besides, you can leave the condition blank and put any statement in the case
block, however, you have to be careful that the cases are unique. Example:

switch ( true )
{
   case (orgStructureADG.selectedItem is VendorCompcodeData):
   {
 trace( VendorCompcodeData );
   }
   break;
   case (orgStructureADG.selectedItem is VendorPurchorgData):
   {
 trace( VendorPurchorgData );
   }
   break;
   default:
   {
 trace( default )
   }
}

However, I would do it like this:

switch ((orgStructureADG.selectedItem as Object).prototype)
{
   case VendorCompcodeData:
   {
 trace( VendorCompcodeData );
   }
   break;
   case VendorPurchorgData:
   {
 trace( VendorPurchorgData );
   }
   break;
   default:
   {
 trace( default )
   }
}

Best.

Oleg

Re: [flexcoders] double check that this Switch statement can't work...

[Oleg Sivokon]

Sorry, typo...

switch ((orgStructureADG.selectedItem as Object).constructor)
{
   case VendorCompcodeData:
   {
 trace( VendorCompcodeData );
   }
   break;
   case VendorPurchorgData:
   {
 trace( VendorPurchorgData );
   }
   break;
   default:
   {
 trace( default )
   }
}

Re: [flexcoders] double check that this Switch statement can't work...

[Nick Middleweek]

Ah nice... Cheers Oleg.

I always put my break; statement inside the case brackets. I quite like the
1st way... Easier to read I think.


Thanks,
Nick




On 25 March 2010 12:49, Oleg Sivokon olegsivo...@gmail.com wrote:



 In AS3 switch construction uses break - otherwise it'll fall through (all
 cases will be executed after the first case that matches the condition).
 Besides, you can leave the condition blank and put any statement in the
 case block, however, you have to be careful that the cases are unique.
 Example:

 switch ( true )
 {
case (orgStructureADG.selectedItem is VendorCompcodeData):
{
  trace( VendorCompcodeData );
}
break;
case (orgStructureADG.selectedItem is VendorPurchorgData):
{
  trace( VendorPurchorgData );
}
break;
default:
{
  trace( default )
}
 }

 However, I would do it like this:

 switch ((orgStructureADG.selectedItem as Object).prototype)
 {
case VendorCompcodeData:
{
  trace( VendorCompcodeData );
}
break;
case VendorPurchorgData:
{
  trace( VendorPurchorgData );
}
break;
default:
{
  trace( default )
}
 }

 Best.

 Oleg