The Wc3c Daily WTF: GetLeakFreeUnitsInMap

//    _______________________
//   | GetLeakFreeUnitsInMap |
//  |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|
//  | This function will get all units in the map the leakfree way.  |
//  |  - (C) Zoxc 2006                                               |
//  |________________________________________________________________|

function NothingToNull takes nothing returns handle  // A little "hack" to pass data and clean leaks at the same time
return null
endfunction

function ClearUnitLeak takes nothing returns nothing
local unit ToClean = GetEnumUnit() // Since we are assigning the unit here we can't remove the leaks at the same time.
call RemoveUnit(ToClean)
set ToClean = null // Then we must do it here
endfunction

function GetLeakFreeUnitsInMap  takes nothing returns group
local rect Map = null //Set it to null here so we don't have to do it later, saves us some bytes
local group Units = null

set Map = NothingToNull(RemoveRect(GetPlayableMapRect())) // We get the mpa rect and clean the leaks at once

set Units = NothingToNull(DestroyGroup(GetUnitsInRectAll(Map))) // Here we get all units in Map then cleaning leak

call ForGroup(Units, function ClearUnitLeak) // Clean leaks for all units

return Units // Return leakfree units in map
endfunction