[REBOL] Re: Simple sorting
From: carl:cybercraft at: 26-Sep-2002 12:42
On 26-Sep-02, Sean Johnson wrote:
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> Hi all,
>
> Been off the list for a while because I just couldn't keep up with
> the = volume of this great living list! Quickie question:
> How do I get the code, listing: sort read %., to sort alphabetically
> by = directories first then by filenames? So, the result looks like
> this:
>>> sort read %.
> == [%dir1/ %dir2/ %dir3/ %file1 %file2 %file3]
>
> I know I'm missing something easy here...maybe a sort option?
>
> Regards,
>
> Sean C. Johnson
Sort has a compare refinement that allows you to use a function to
make a comparison, the idea being to return true or false depending
on a comparison of two values. (I think - I only used it for the
first time yesterday:) For instance, this sorts on strings from the
second character onwards...
>> blk: ["xccc" "yaaa" "zbbb"]
== ["xccc" "yaaa" "zbbb"]
>> sort/compare blk func [a b][(second a) < second b]
== ["yaaa" "zbbb" "xccc"]
So, expand on that to sort your directory. (My rushed attempt didn't
work, so I won't inflict it on you;) Note, if you seperate your
function, use...
sort/compare blk :my-function
Note the colon.
--
Carl Read
