[Trigger] Unit Group Array Strange Error

[ForeverBeADragon]

Try this trigger and you'll get my problem.

• Error
  • Events
    • Player - Player 1 (Red) skips a cinematic sequence
  • Conditions
  • Actions
    • Unit Group - Add Peasant 0001 <gen> to Group[2]
    • Game - Display to (All players) the text: (String((Number of units in Group[2])))

It shows that adding a unit into unit group array with index 2 doesn't work.
Sometime I need to add to group[2] before group[1]. Is there some script to fix that?

 

[Maker]

That is because the group has not been created most likely. Either create it with

• Custom script: set udg_Group[2] = CreateGroup()

or by setting the initial size of the group array to 2.

 

[ForeverBeADragon]

That is because the group has not been created most likely. Either create it with

• Custom script: set udg_Group[2] = CreateGroup()

or by setting the initial size of the group array to 2.

Oh thanks.
But is there any script to check if the group is created or not?

 

[WaterKnight]

Arrays of objects are initialized with null in jass. That's maybe not a too good practise though. You can create a counter/list that stores the available stuff or ask for the default values in a gamecache/hashtable, would not be much different.

 

[Maker]

Oh thanks.
But is there any script to check if the group is created or not?

if udg_Group[x] == null then
Game - Display text message...
endif

The if and endif lines should be in custom scripts. Replace x with your index. The text message is for debugging.