[Trigger] Array +1 with limit

[Null]

I'm making an array which must store 20 item types. Every time a unit buys an item, that item is stored in the array. I'm noob at arrays, can some1 pls show me how to do it.

 

[Warseeker]

A unit Sells an item (from shop)

Item type of (Sold item) Equal to Item X

If ItemCount Less than or equal to 20

Then Set ItemCount = ItemCount + 1

Else Remove (Sold item)

 

[Null]

Where do I find the ''If ItemCount Less than or equal to 20'' condition?
And what Index should the 1st itemcount from ''Then Set ItemCount = ItemCount + 1'' have?

 

[Warseeker]

Integer Comparison.

 

[Null]

Where exactly ( unit,hero,trigger; i can't see any index condition), and ItemCount is an item type, not an iteger, right?

 

[Uncle]

If you want to store 20 Items for more than 1 unit you should use a Hashtable.
A Complete Beginners Guide to Hashtables

The question is, do you want to save the Item Type or the actual Item because these are two different things. Item-Type is saved as an Integer where as Items can be saved using the Item's handle.

For Item-Types you can save them in a Hashtable as Integers like this:

• Setup
  • Events
    • Map initialization
  • Conditions
  • Actions
    • Hashtable - Create a hashtable
    • Set VariableSet ItemHashtable = (Last created hashtable)

• Acquire Item
  • Events
    • Unit - A unit Acquires an item
  • Conditions
  • Actions
    • Set VariableSet Total = (Load 0 of (Key (Triggering unit).) from ItemHashtable.)
    • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
      • If - Conditions
        • Total Less than 20
      • Then - Actions
        • Set VariableSet Total = (Total + 1)
        • Hashtable - Save Total as 0 of (Key (Triggering unit).) in ItemHashtable.
        • Set VariableSet ItemType = (Item-type of (Item being manipulated))
        • Custom script: set udg_Item = udg_ItemType
        • Hashtable - Save Item as Total of (Key (Triggering unit).) in ItemHashtable.
      • Else - Actions

This is just the basic system without any extra functionality. It will store the first 20 Item-Types you acquire in the Hashtable saving them at positions 1 to 20 using the Acquiring Unit as the Key.

An example of getting and creating a Unit's 5th saved Item from the Hashtable:

• Load Item Type
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
  • Actions
    • Set VariableSet Item = (Load 5 of (Key (Triggering unit).) from ItemHashtable.)
    • Custom script: set udg_ItemType = udg_Item
    • Item - Create ItemType at (Position of (Triggering unit))

 

[Null]

I want to have 20 diferent item types with their separated integer. ex: ItemT0 (=claws of attack), ItemT1 (=Gloves of Haste), ItemT2 (=Hood of Cunning)..., itemT19 (=Rod of Necromancy)

 

[Uncle]

Do you mean like this?

• Item Type Array
  • Events
    • Map initialization
  • Conditions
  • Actions
    • Set VariableSet Items[1] = Claws of Attack +15
    • Set VariableSet Items[2] = Crown of Kings +5
    • Set VariableSet Items[3] = Kelen's Dagger of Escape
    • Set VariableSet Items[4] = Mask of Death
    • Set VariableSet Items[5] = Orb of Frost

 

[Null]

Whenever I buy an item it gets to be a variable. The trigger should look like what Warseeker sent the 1st time, but there are 4 unclear things:

A unit Sells an item (from shop)

Item type of (Sold item) Equal to Item X

If ItemCount Less than or equal to 20

Then Set ItemCount = ItemCount + 1

Else Remove (Sold item)

Where do I find the ''If ItemCount Less than or equal to 20'' condition?
And what Index should the 1st itemcount from ''Then Set ItemCount = ItemCount + 1'' have? and ItemCount is an item type, not an iteger, right?

 

[Uncle]

ItemCount is an Integer.

When you go into the conditions and click Integer Comparison, you'll see a bubble at the top that says Variable. Select that and choose ItemCount from the list of Integer variables.

Then hit OK and you'll be able to edit the rest.

• Untitled Trigger 001
  • Events
    • Unit - A unit Acquires an item
  • Conditions
    • ItemCount Less than 20
  • Actions
    • Set VariableSet ItemCount = (ItemCount + 1)
    • Set VariableSet ItemType[ItemCount] = (Item-type of (Item being manipulated))

OR

• Untitled Trigger 001
  • Events
    • Unit - A unit Sells an item (from shop)
  • Conditions
    • ItemCount Less than 20
  • Actions
    • Set VariableSet ItemCount = (ItemCount + 1)
    • Set VariableSet ItemType[ItemCount] = (Item-type of (Sold Item))

ItemCount = Integer
ItemType = Item-Type (Array)

 

[Null]

Thanks, guys! You saved me!

 

[Map Designer]

IIRC array size selection does not matter.

any array can store maximum of 8992 regardless of the size you choose. no more, no less.

though I might have forgotten the correct number

 

[Uncle]

Array size was increased to 32,768 in patch 1.29

I've had issues with Unit Groups not working without setting their Size. It generally isn't required though.