_ArraySort(): bug or change in help file [Neither]

[c.haslam]

I have done some experimenting with _ArraySort() on a 2D array containing only string elements. The array is generated with:

Local $ar[200][5]
For $i = 0 to 199
    for $j = 0 to 4
        Local $n = Chr(Random(97,122,1))
        $ar[$i][$j] = $n&StringFormat('%03u',$i)&'_'&$j
    Next
Next

My observations:

• _ArraySort($ar,0,0,0,0) sorts the array on all columns
• _ArraySort($ar,0,0,0,$n) for $n from 1 to 3 sorts on column $n

So there seems to be no way of sorting only on the first column, column 0.

The help for the latest beta says $isubItem  Sub-index to sort on in 2D arrays (default 0 = first column)

Is this a bug or does the help page need to be changed? Many people (including me) have probably coded _ArraySort($ar,0,0,0,0) to sort a whole array.

Edited June 15, 2015 by Melba23
Amended title

[jchd]

So there seems to be no way of sorting only on the first column, column 0.

 _ArraySort($ar) will do that, just like _ArraySort($ar, 0, 0, 0, 0). I don't see columns 1...4 sorted anyway (release or beta). Sort applies to column 0 only.

[Melba23]

c.haslam,

_ArraySort works on all columns (including column 0) for me:

#include <Array.au3>

Local $ar[10][5]
For $i = 0 To 9
    For $j = 0 To 4
        Local $n = Chr(Random(97, 122, 1))
        $ar[$i][$j] = $n & StringFormat('%03u', $i) & '_' & $j
    Next
Next

_ArrayDisplay($ar, "Unsorted", Default, 8)

For $i = 0 To 4
    _ArraySort($ar, 0, 0, 0, $i)
    _ArrayDisplay($ar, "Sorted on col: " & $i, Default, 8)
Next

M23

[c.haslam]

Thanks. Strange!