brand new jass beginner +rep for help

[Laiev]

No, you can't add/remove variables to/from a struct after game started.

You can set/initializer then after game started.

 

[Dirac]

Well if you're dealing with a struct for heroes i recommend you to use AIDS or UnitIndexer and your struct would look like this

struct SomeStruct extends array
	integer Agi
	integer Int
	integer Str

	private method AIDS_onCreate takes nothing returns nothing
		set this.Agi=GetHeroAgi(this.unit,false)
		set this.Int=GetHeroInt(this.unit,false)
		set this.Str=GetHeroStr(this.unit,false)
	endmethod
	
	private static method AIDS_filter takes unit u returns boolean
		return IsUnitHero(u)
	endmethod

	//! runtextmacro AIDS()
endstruct

 

[Laiev]

	private static method AIDS_filter takes unit u returns boolean
    return IsUnitType(u, UNIT_TYPE_HERO)
endmethod