[SOLVED] strange result whit Random??

[FMS]

Hello,

Maybe a simple question, but i got some strange results whit this code.
i din't expected a empty $gridlist[$i * $x] when I _ArrayDisplay($gridlist) Or is mine code strangley written where I'm not aware of???

thnx,

FMS

Global $grid[10][10]    
   Global $gridlist[ubound($grid,1) * ubound($grid,2)]

   For $i = 0 to ubound($grid,1) - 1
      For $x = 0 to ubound($grid,2) - 1
         If Random(-1 , 1) >= 0 Then
            $gridlist[$i * $x] = 0
         Else
            $gridlist[$i * $x] = 1
         EndIf
         If @error Then
            $gridlist[$i * $x] = 2
         EndIf
      Next
   Next

   _ArrayDisplay($gridlist)

 

Edited December 22, 2017 by FMS

[kylomas]

..snip.. 

Edited December 22, 2017 by kylomas

[FMS]

15 minutes ago, kylomas said:

FMS,

0*any number = 0...

Kylomas

thnx......

[kylomas]

I snipped it cause this would not account for "blank" cells, just 0 filled cells...

[jchd]

But yes, that's the problem. Empty cells were never assigned a numeric values, just emtpy string as default value.

Global $grid[10][10]
   Global $gridlist[ubound($grid,1) * ubound($grid,2)]

   For $i = 0 to ubound($grid,1) - 1
      For $x = 0 to ubound($grid,2) - 1
         If Random(-1 , 1) >= 0 Then
            $gridlist[$i * 10 + $x] = 0
         Else
            $gridlist[$i * 10 + $x] = 1
         EndIf
         If @error Then
            $gridlist[$i * 10 + $x] = 2
         EndIf
      Next
   Next

   _ArrayDisplay($gridlist)