r3wp [groups: 83 posts: 189283]
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search
 

World: r3wp

[Core] Discuss core issues

Gabriele
7-Jul-2007
[8392x3]
so what you do is, for any dir,
foreach file read dir [do-something-with dir/:file]
>> print-dir: func [dir] [foreach file read dir [print dir/:file]]
>> print-dir %public/www.rebol.com/
public/www.rebol.com/index.r
public/www.rebol.com/docs/
public/www.rebol.com/bay.jpg
public/www.rebol.com/view/
public/www.rebol.com/downloads/
>> print-dir %/
/c/
/d/
/e/
/f/
/g/
/h/
/z/
Gregg
7-Jul-2007
[8395]
Petr, my file-list stuff should be on REBOL.org.
Pekr
7-Jul-2007
[8396x3]
gabriele - how does it relate to my report?
I strictly refuse following result:

>> exists? %rebol.exe
== true
>> exists? %c/
== false
both queried items are result of regular 'read function call on filesystem 
...
Chris
7-Jul-2007
[8399]
>> change-dir %/
== %/
>> exists? %c/
== true
Pekr
7-Jul-2007
[8400x2]
still does not explain my results
what is first slash representing? It is a root-dir? Then it might 
make sense. Or is it just a syntax?
Chris
7-Jul-2007
[8402]
Yes, filesystem root.
Pekr
7-Jul-2007
[8403]
then your example stands for something like following?

>> exists? join %/ %c/
== true
Chris
7-Jul-2007
[8404]
Yep.
Pekr
7-Jul-2007
[8405x2]
so that %c/, even if being a drive assigned letter, is being treated 
as a directory here ....
hmm, ok, I will remember it, but it might confuse some ppl ....
Chris
7-Jul-2007
[8407]
Yes.  I think this is Rebol's way of handling Windows unique drive 
system.
Pekr
7-Jul-2007
[8408x3]
Sunanda - here is one fine doc about all possible modes - http://rebol.com/docs/changes.html#section-6.2
somehow can't set-modes for directory :-)
is there a bug or what? Can copy-modes be set for directory too?

>> modes: get-modes %sqlite/ get-modes %sqlite/ 'copy-modes

== [creation-date: 2-Jul-2007/10:20:05+2:00 access-date: 2-Jul-2007/10:20:07+2:00 
modification-date: 2-Jul-2007/
10:20:07+2:00 owner...

>> set-modes %sqlite/ modes
** Access Error: Cannot open /c/!rebol/view/sqlite/
** Near: set-modes %sqlite/ modes


I simply wanted also my copied directories, not only files, to carry 
on original attributes ....
Brock
7-Jul-2007
[8411x3]
Pekr, 
>>exists %/c/
= true
... even when not in the root directory.
>> exists? %/c/
== true
>> what-dir
== %/C/Program Files/rebol/view/
>>
Gabriele
8-Jul-2007
[8414]
Petr, I'm not sure what you want. Obviously %c/ is a dir, and obviously 
it is at the root, so you have to access it as %/c/. This is called 
platform independent file paths. It's the same for all platforms.
Pekr
8-Jul-2007
[8415x2]
Brock, I was confused about reading %/ and getting %c/ instead of 
%/c/, that is all. I did not regarded %/ a root, I thought it is 
just a helper, as %. is .... that dot surely is not real part of 
filesystem, is it?
I resolved it for myself by defining root: %/ and joining it with 
the result of the read, works .... new problem for me is how to set 
attributes of copied directory. Not sure why do I receive error. 
It seems like that dir would be locked or so, but not sure why set-modes 
fail. Is set-modes supposed to work with directories?
Graham
8-Jul-2007
[8417x2]
no
I reported this a couple of years ago .. it does not work
Pekr
8-Jul-2007
[8419x2]
ok, thanks a lot ... it is a pity, I don't need it in fact, but found 
that possibility in docs, tried it, and it nicely works for files 
....
and is there a way to create directory not using make-dir, directly 
setting such attributes during creation process, not later?
Gabriele
8-Jul-2007
[8421]
Petr, that dot (%./) *is* part of the filesystem in most filesystems.
Pekr
9-Jul-2007
[8422]
Can I get following solved somehow, without defining globally visible 
word?

report: does [print item]
foreach item [1 2 3][report item]
Sunanda
9-Jul-2007
[8423]
Given 'does is simply a shortcut for 'func, why not:
    report: func [item] [print item]
Pekr
9-Jul-2007
[8424x2]
because I want to have clean interface to my copy-dir source target 
.....
the trouble is, that later on, I dynamically detect new drive. I 
can't know, what letter usb drive maps to. So I do:

forever [

  for each disk difference stored-disks read %/ [copy-dir source target]
]
btiffin
9-Jul-2007
[8426]
foreach item [1 2 3] [do bind second :report 'item] may work
Pekr
9-Jul-2007
[8427x3]
And I somehow wanted to have 'disk available in my copy-dir :-) Well, 
I can easily solve it via drive: disk and use drive global word in 
my copy-dir func. It is just that I was thinking if I can somehow 
magically bind to it :-)
I need it vice versa - bind item in report to foreach item ....
but no problem, I can get it working other way, I was just curious 
...
btiffin
9-Jul-2007
[8430x2]
That will bind report and item to the local foreach item.
Well actually it binds print and item  to the local item.
Pekr
9-Jul-2007
[8432]
ah .... I tried to look at it from the perspective of report function, 
and was stuck ....
btiffin
9-Jul-2007
[8433]
Yeah bind is a little ummm, magically delicious.
Pekr
9-Jul-2007
[8434]
I have weak USB port, and my flash disconnects from time to time. 
I am testing my copy-dir small script, and during disconnection it 
failed. I had following code there:

attempt [
  data: read/binary source
  write/binary target data
]


Shouldn't attempt catch the error, even if I am in the middle of 
copying of file?
btiffin
9-Jul-2007
[8435x2]
imho.  yes it should.
I've been a little curious about attempt...
if not error? set/any 'value try :value [get/any 'value]

Are there any conditions where the [get/any 'value] could fail and 
as it is outside the try cause an interpreter error trap?  I don't 
know.
Ladislav
9-Jul-2007
[8437]
Pekr: "because I want to have clean interface to my copy-dir source 
target" - I may be dense, but what is "unclean" there?
Pekr
9-Jul-2007
[8438x2]
got to go, but I don't want to send another parameter (drive letter) 
to the function ...
So what I did was, that I defined one word inside foreach loop, which 
will be accessible from other place. It if sufficient, but what is 
"unclean" about it is, that I somehow start to think, that more strict 
way of defining variables is better than globals "floating around" 
:-)
Gabriele
9-Jul-2007
[8440x2]
petr, why is not the disk in the source argument?
inside foreach and accessible somewhere else == global. the proper 
way to do it is a function argument. you can bind, but that does 
not seem clean to me (argument is clean).