Simple question: GroupEnum and Filters

[newtonrox]

GroupEnumUnitsInRect() needs a boolexpr that is provided by a filter as parameter right?
So, I was wondering what's the difference when you return true or false to the GroupEnumUnitsInRect().

Does the GroupEnum..() only picks the unit when the filter returns true?

To refer to the picked unit of GroupEnum...() do I have to use GetFilterUnit() inside the filter?

And what's the difference between using Filter(function filter) and Condition(function filter) as a boolexpr for GroupEnum...() ?

 

[Artificial]

> GroupEnumUnitsInRect() needs a boolexpr that is provided by a filter as parameter right?
You could also provide [ljass]null[/ljass] as the argument, but doing that with GroupEnums causes a leak, so you'd better provide some boolexpr. x)

> Does the GroupEnum..() only picks the unit when the filter returns true?
Yes.

> To refer to the picked unit of GroupEnum...() do I have to use GetFilterUnit() inside the filter?
Yes, but that isn't actually 'picked unit,' but rather 'matching unit' in GUI terms (e.g. "Pick every unit matching ((Matching unit) Is a Unit)..."

'Picked unit,' i.e. [ljass]GetEnumUnit()[/ljass], is what you'd use inside a ForGroup callback.

But anyway, yeah. ^_^

> And what's the difference between using Filter(function filter) and Condition(function filter) as a boolexpr for GroupEnum...() ?
None. They got no difference in any situation. ;p

 

[newtonrox]

thx! ^^

Is there any GroupEnum...()-like function that sets 2 groups? One for the matching unit and another for the Non-matching unit.

or do I always have to call GroupEnumUnitsInRect() 2 times with 2 different filters?

 

[Romek]

Use a function like this as the filter:

function Filter takes nothing returns boolean
   if not (<Your Conditions>) then
      call GroupAddUnit(<The Other Group>, GetFilterUnit())
      return false
   endif
   return true
endfunction

 

[newtonrox]

thank you!