JASS Tutorial

Q1: Yes, you can. BUT only if you want to use it IMMEDIATLY, if not, the global can be overwritten by another of your triggers(maybe you use the var multiple times).

Q2: To prvent things like that, you must make your globals arrays and you need a counter for the array index. That was what you missunderstood.

Clear?

Whats wrong with this, its just a test trigger for using locals

the errors I get only contains the ones with the
local a, what to I do wrong?

Is the only problem that the local is after the first function?

function Trig_Untitled_Trigger_003_Actions takes nothing returns nothing
    set a = ( a + "1" )
    call DisplayTextToForce( GetPlayersAll(), a )
endfunction

//===========================================================================
function InitTrig_Untitled_Trigger_003 takes nothing returns nothing
    set gg_trg_Untitled_Trigger_003 = CreateTrigger( )
    local string a
    call TriggerRegisterTimerEventPeriodic( gg_trg_Untitled_Trigger_003, 1.00 )
    call TriggerAddAction( gg_trg_Untitled_Trigger_003, function Trig_Untitled_Trigger_003_Actions )
endfunction

Well, your problem is more than obvious. Locals are visible (can be used) only in the function in which you declare them, not trigger. Conclusion? Your code should look like this:

function Trig_Untitled_Trigger_003_Actions takes nothing returns nothing
local string a
set a = ( a + "1" )
call DisplayTextToForce( GetPlayersAll(), a )
endfunction

//===========================================================================
function InitTrig_Untitled_Trigger_003 takes nothing returns nothing
set gg_trg_Untitled_Trigger_003 = CreateTrigger( )
call TriggerRegisterTimerEventPeriodic( gg_trg_Untitled_Trigger_003, 1.00 )
call TriggerAddAction( gg_trg_Untitled_Trigger_003, function Trig_Untitled_Trigger_003_Actions )
endfunction

Oh, and be careful, you must declare locals in a function BEFORE doing anything else. For example, in your section function you did this:

set gg_trg_Untitled_Trigger_003 = CreateTrigger( )
local string a

INCORRECT! Setting a value to a variable is also an action. This is correct:

local string a
set gg_trg_Untitled_Trigger_003 = CreateTrigger( )

Hope this helped!

~Daelin

When u have local vars that you won't set again and u'll only use as data locals,you can set them right when u make them.So:

local string a
set a = ( a + "1" )

turns to:

local string a=a+"1" //Or a=a+I2S(1)

Not nessecery but it's good to arrange your script.

How do you determine "take" and "return" values for a function?

For Blizzard functions? Use Jass Shop Pro!

~Daelin

well i dont know sh*t about jass i just dont get it :S

why is there

blablabla TAKES nothing blablabla RETURNS nothing

and why sometimes TAKES something and RETURNS something

and sometimes Takes nothing RETURNS something :S:S:S

and what can u do with JASS taht u cant with GUI? only local variables? actualy its 4 15 o clock ill read it agian when im less sleepy.

i got a language problem if anyone could help me i will be very happy lol. my problem is that i got spanish version and i dont know wich hability is locust if u could tell me in spanish or tell me one unit allreay has it to me to look for it it will be cool, ty m8s

Can I post a topic translating this tutorial to Portuguese?

Dota-Demon[aS]... The rawcode is 'Aloc' and I think rawcodes are the same for all the languages. You can shift+double click on the abilities field and manually add Aloc yourself. :)

Marcelo Hossomi... Go ahead. Though this tutorial is quite rusty and could use some improvements... Though I don't have time for that right now.

TroubleShooter... Infact, there are a lot of things that make JASS better than GUI. Here are some of the reasons (by Vexorian):

Originally Posted by Vexorian

JASS Advantages
If you use JASS directly instead of GUI you win:
Functions: you can make your own functions and that will save you time
Efficiency: Typing is faster than clicking with the mouse
Ability to write more optimized code: GUI's automatization is not flexible enough to make well optimized code and it most of the times will generate really slow code.
Local variables and multi instancibility : GUI is simply not good to make things multi player proof.
Access to 'hidden' native functions : For some reasons GUI does not allow you to use a lot of functions like those related to memory leaks (you won't be able to fix a big quantity of memory leaks in GUI)

~Daelin