How to detect in which inventory slot is item?

[Restor]

When hero uses an item, I need to replace it with another item in the same inventory slot

like

E:unit cast an ability X
C:abilit is ITEM_X
A:remove item ITEM_X from hero
create item ITEM_Z for hero
issue hero to place ITEM_Z to inventory slot x (x=inventory slot, where the item_x originally was)

but the last line is not as an option in gui.

 

[GangSpear]

Remove the ITEM_X and Create ITEM_Z to the caster?
Abit confused -.-

 

[Bannar]

This should help you:

• item replace
  • Events
    • Unit - A unit Starts effect of ability
  • Conditions
    • (Ability being cast) Equal to Item change
  • Actions
    • Set ItemX = (Target item of ability being cast)
    • Set ItemZ = Mask of Death
    • For each (Integer A) from 1 to 6, do (Actions)
      • Loop - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (Item carried by (Triggering unit) in slot (Integer A)) Equal to ItemX
          • Then - Actions
            • Set i = (Integer A)
          • Else - Actions
    • Hero - Drop the item from slot i of (Triggering unit)
    • Item - Remove (Last dropped item)
    • Hero - Create ItemZ and give it to (Triggering unit)
    • Unit - Order (Triggering unit) to move (Last created item) to inventory slot i

 

[Dr Super Good]

native UnitAddItemToSlotById takes unit whichUnit,integer itemId,integer itemSlot returns boolean

Hopefully this native can do what you want.

 

[Bannar]

Unfortunately, I was checking that native by myself some time ago and it doesn't work, and even causes bugs sometimes.
Searched for explanation, found few interesting posts (like here and here). It is said to better leave the native alone, and work with dummy items or other tricks.

Sad, I thought that if given function is created, it should be bug-less and there should be proper purpose for it's creation.