Build an array in AHK from mouse clicks - autohotkey

Question

I am looking to build an array of mouse click coordinates. I'm struggling to understand how you build out a two-dimensional array. Or if I'm going about this wrong and should build two arrays. One with X-coordinates and one with Y-coordinates.
I can easily build out an array with just X coordinates or just Y-coordinates. Can I somehow build out X and Y into the same 2-D array?
ArrayX := []
ArrayY := []
counter:=1
^Lbutton::
MouseGetPos CurX, CurY
ArrayX[counter] := CurX
ArrayY[counter] := CurY
counter++
return
^q::
loop % ArrayX.MaxIndex()
items.= ArrayX[A_Index] ","
StringLeft, items, items, Strlen(items)-1
Clipboard := items
msgbox % items
items:=""
loop % ArrayY.MaxIndex()
items.= ArrayY[A_Index] ","
StringLeft, items, items, Strlen(items)-1
Clipboard := items
msgbox % items
exitapp

Answer 1

You'd create a multidimensional or a jagged array in AHK by just assigning the element at the desired index an array.
Array[3] := [481, 529]
And you'd access it by just accessing the elements in order, e.g:
Array[3][2] would result in 529.
Other things to improve on your script:
You might want to use the .Push() method to append values to your array.
A for loop might be a desirable alternative to normal looping and worrying about the index:
for each, element in Array
StringLeft is a deprecated legacy command and shouldn't be used anyone. SubStr() replaces it.
However, for what you were doing with it, RTrim() would be better/easier:
RTrim(items, ",")
Revised script:
Array := []
^LButton::
MouseGetPos, CurX, CurY
Array.Push([CurX, CurY])
return
^q::
For each, element in Array
items .= element[1] ", " element[2] "`n"
MsgBox, % RTrim(items, "`n")
ExitApp
return