Since -s performs an alphabetic sort, it would be nice if numeric and descending sort switches were added as well.

Speaking of sorting, and since same people read this and the Bug Reports boards, I'd like to hear if one succeed to use the -u (numeric sort) switch of the /filter command. It just doesn't work.

If file1.txt contains:

3
2
1

and I type /filter -ffu file1.txt file2.txt, file2.txt will come up with same data order. no sorting.

The -t switch sorts the output based on [c s], column C using character S as the columns separator
--
/filter -fftu 1 1 file1.txt file2.txt * <- to sort 1,2,3,4,
/filter -fftue 1 1 file1.txt file2.txt * <- to sort 4,3,2,1
If there are no 'columns', make up some ;)

edit-
Added the forgotten "t" switches

Thanks for your reply, yes, it sorted fine after adding the -t switch followed by '1 1'.

I didn't get the column idea though. can you please show me an example of file column?

Ok, the "-t 1 1" was because in your sample there were no columns, so I "invented" some.

to explain a little more...
file.txt
dataA 1
dataB 2
dataC 3

you want to sort by the values 1,2,3 you would use "-t 2 32" [column 2, seperator 32 ($chr(32))]
to sort by dataX .. "-t 1 32"

file.txt
1:A
2:B
3:C

here if you want to sort by A,B,C it is "-t 2 58"
or to sort by 1,2,3 "-t 1 58"

amazing, thank you

You're welcome, glad I could help