[JASS] IsUnitGroupEmptyBJ Native??

[FUJI]

I have a question about JASS natives and BJ's. In GUI the function is

• (Group is empty) Equal to True

Then in JASS is

IsUnitGroupEmptyBJ(udg_Group) == true

I've search this in JNGP Function Lists because it is a BJ (means bad?) and I want a native function. After I search that function this is now it's function:

function IsUnitGroupEmptyBJ takes group g returns boolean
    // If the user wants the group destroyed, remember that fact and clear
    // the flag, in case it is used again in the callback.
    local boolean wantDestroy = bj_wantDestroyGroup
    set bj_wantDestroyGroup = false

    set bj_isUnitGroupEmptyResult = true
    call ForGroup(g, function IsUnitGroupEmptyBJEnum)

    // If the user wants the group destroyed, do so now.
    if (wantDestroy) then
        call DestroyGroup(g)
    endif
    return bj_isUnitGroupEmptyResult
endfunction

I dunno where is the native function in it or it has none native function?
The question is Is there any native function in this function???

 

[Maker]

There is no native, but you can use return FirstOfGroup(group) == null

 

[WaterKnight]

The BJ iterates over the group via ForGroup and in IsUnitGroupEmptyBJEnum resets bj_isUnitGroupEmptyResult.

 

[Malhorne]

Not all BJ are evil but many of them are.
To check if the group is empty use Maker's idea

In your case this BJ calls another BJ with a ForGroup that's bad :/

 

[WaterKnight]

Maker's suggestion only fails in case there are shadow references inside the group, meaning there are units you have removed from the game but forgot to remove from the group.

 

[Maker]

^And to make sure that doesn't happen, you can use GetUnitTypeId(unit) != 0