Can you pass arrays?

12-11-2009, 09:47 PM	#1
The_AwaKening	passing an array errors out. Is it possible to do? If so, how could I pass an array without setting it first like in other scripting languages? Array(0, 1, 2, 3) JASS: function testArrays takes integer array items returns nothing endfunction

12-11-2009, 09:56 PM	#2
Rising_Dusk	No. It is not possible. Pass a struct that contains the array.

12-11-2009, 10:20 PM

grim001

JASS:

type MyArray extends integer array[100] //100 is the size, 99 is max index per instance

function Test takes MyArray ma returns nothing
    call BJDebugMsg(I2S(ma[0])) //prints 1
    call BJDebugMsg(I2S(ma[99])) //prints 777
endfunction

function Example takes nothing returns nothing
    local MyArray ma = MyArray.create()
        set ma[0] = 1
        set ma[99] = 777
        call Test(ma)
endfunction

The above shows how to use a basic dynamic array. Your other options are to use an array member of a struct and pass the struct, or to use method operators to make the struct itself behave as an instantiatable array:

JASS:

struct MyArray
    private real array data[100]

    method operator [] takes integer i returns real
        return data[i]
    endmethod

    method operator []= takes integer i, real r returns nothing
        set data[i] = r
    endmethod
endstruct

Now you can use this MyArray struct in an identical way to the first example, and even add your own stuff such as a .size member if you wanted to.

12-12-2009, 12:44 AM	#4
PurplePoot	Don't forget to .destroy() it when you're done with it.