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REBOL Community
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Below are the 20 most recent journal entries recorded in the "REBOL Community" journal:[<< Previous 20 entries]
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01:15 pm
[anohin]
[Link] |
R3/alpha!
Сбылись мечты народные, Р3/альфа выложена в открытый доступ.
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09:01 pm
[stillcarl]
[Link] |
Rebol 3 reaches alpha status...
See here...
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08:33 pm
[stillcarl]
[Link] |
First thoughts on RebGUI
I've only just noticed the RebGUI demo, (see Carl's Blog or a couple of posts back from here), but I kind of like it. Couple it with the browser plugin releases coming along nicely, (see The REBOL Week ), and it looks like REBOL's finally moving ahead again. (Not that I've found time to test the new plugins mentioned there yet.)
The one major thing I didn't like about the demo was the inability to block-mark text anywhere but in the editable text fields and areas. If there's text anywhere on a screen, I expect to be able copy it to the clipboard. I hope this isn't the default behaviour for RebGUI...
Otherwise, real good so far.
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01:30 am
[carlsblogalert]
[Link] |
Carl's Blog Alert
Sat, 24 Jun 2006 0:07:42
Copy and Checksum Large Files
Last week I wrote a short example of how to use checksum ports,
and last year I gave an example of how to use the /seek refinement to deal with large files.
The code below combines these two concepts in a function that copies a file, even if the file is larger than memory (e.g. MPG, MP3, WAV). It will also compute and return the checksum of the file's data.
This is a robust "commercial quality" file copy function that you can use in your applications. If you find a bug, please let me know and I will correct it here.
REBOL [
Title: "Copy File with Optional Checksum"
Author: "Carl Sassenrath"
License: 'MIT
]
copy-file: func [
"Copy a file. Return WORD for failure or return optional checksum."
from [file!]
dest [file!]
/sum "checksum the data"
/local
data
path
ff ; from file port
tf ; to file port
][
path: split-path dest
foreach [block err-word] [
[make-dir/deep path/1] dir-failed
[ff: open/binary/read/seek from] read-failed
[tf: open/binary/write dest] write-failed
[if sum [sum: open [scheme: 'checksum]]] sum-failed
[
while [not tail? ff] [
print index? ff
data: copy/part ff 100000
insert tail tf data
if sum [insert sum data]
ff: skip ff length? data
]
;print index? ff
] copy-failed
][
if error? try block [
if port? sum [close sum]
if tf [close tf]
if ff [close ff]
return err-word
]
]
data: none
if sum [
update sum
data: copy sum
close sum
]
close tf
close ff
data ; checksum value or none
]
print copy-file/sum %movie.mpg %movie2.mpg
ask "done"
---Notes:
#The code has only been tested on REBOL 2.6.2. The code requires a newer REBOL that supports the /seek refinement (Core 2.6).
#If you are new to REBOL, note the way the foreach is used to perform error checking for each step and return the appropriate error word for failures.
#The make-dir line is correct as written. If you do a source on make-dir you will see that it becomes a no-op if the dir exists. Adding an additional exists? check is not needed.
#The "from file" (ff) is opened with /read access. This is done to cause an error if the file cannot be opened. Without it, the file will open as an empty file, even if it does not exist.
#The checksum port defaults to the SHA1 (secure hash) algorithm.
#The code remembers to close the ports if an error occurs.
#File data are copied in chunks of 100000. This number is arbitrary, and you can set it to whatever buffer size you prefer. Smaller numbers may slow the transfer. Larger numbers will require more memory.
#Uncomment the print lines if you want to see it working. You could also modify those lines to show a progress bar.
More here: http://www.rebol.net/article/0281.html
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09:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Fri, 23 Jun 2006 19:50:49
RebGUI - REBOL/View Graphical User Interface
RebGUI is a good way to build user interfaces in REBOL. If you've not tried it yet, you should.
RebGUI takes many of the best concepts of VID (the visual interface dialect) and provides a useful, smart, clean way to quickly build graphical user interfaces in REBOL.
To see a quick tour of RebGUI click on it in the Demos folder of the REBOL Viewtop or type this URL into your REBOL/View GoTo box (or just DO it in the console):
http://www.rebol.com/rebgui-demo.r
The above script simply does this:
do http://www.dobeash.com/RebGUI/get-rebgui.r
do view-root/public/www.dobeash.com/RebGUI/tour.r
I should mettion that Ashley and his team at Dobeash Software have done a nice job documenting RebGUI. Here's the main page where you can get started:
\in
RebGUI Home Page
/in
For me, RebGUI is exactly the kind of thing I've wanted to see done in REBOL. Remember, VID was/is a prototype. Back in 2001 I expected VID to be replaced with something better in less than a year. VID had some unique and cool ideas (e.g. dialected interface specification, datatyped property dispatch, extensible), but also more than a few quirks and loose ends.
Some of you have asked, "Is it ok to use RebGUI for my REBOL applications?" I say yes! Use what works best for your needs and requirements. For many types of applications, I think RebGUI is a good choice.
More here: http://www.rebol.net/article/0280.html
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08:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Fri, 23 Jun 2006 19:50:49
RebGUI - REBOL/View Graphical User Interface
RebGUI is a great way to build user interfaces in REBOL. If you've not tried it yet, you should.
RebGUI takes many of the good things about VID (the visual interface dialect) and provides a useful, smart, clean way to quickly build graphical user interfaces in REBOL.
To see a quick, simple demo of RebGUI, type this URL into your REBOL/View GoTo box (or just DO it in the console):
http://www.rebol.com/rebgui-demo.r
The script simply does this:
do http://www.dobeash.com/RebGUI/get-rebgui.r
do view-root/public/www.dobeash.com/RebGUI/tour.r
In addition, Ashley and his team at Dobeash Software have done a nice job documenting RebGUI. Here's the main page where you can get started:
\in
RebGUI Home Page
/in
For me, RebGUI is exactly the kind of thing I've wanted to see done in REBOL. Remember, VID was/is a prototype. I expected VID would be totally replaced within less than a year (of 2001!). It had some cool new ideas (e.g. dialected interface specification, datatyped property dispatch, extensible), but also more than a few quirks and loose ends. VID proved its point, and still has its uses, but it's time to move on (and has been for a while now).
Some of you have asked, "Is it ok to use RebGUI for my REBOL applications?" I say yes! Use what works best for your needs and requirements. For many types of applications, I think RebGUI is a good choice.
More here: http://www.rebol.net/article/0280.html
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11:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Tue, 20 Jun 2006 22:45:02
REBOL/Core Guide in the French Language
Did you know that there is a French language translation of the REBOL/Core documentation? I am posting this message to make the link more visible to French speaking developers (and increase search engine ranking for it as well).
Guide Utilisateur de REBOL/Core (Fr)
This translation was created by Philippe Le Goff, with editing revisions from Christophe Coussement, and contribution from Olivier Auverlot.
PS: I would like to personally thank Philippe and his team for making this translation a reality and helping to expand the awareness of REBOL into the French community.
More here: http://www.rebol.net/article/0279.html
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12:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Tue, 13 Jun 2006 12:18:08
How to Calculate Checksums for Large Data or Streams
Ok, so you probably know how to calculate checksums in REBOL. It is easy. For example, a simple checksum is:
sum: checksum data
For a stronger checksum, you can use a secure hashing algorithm, such as SHA1 with code like this:
sum: checksum/secure data
But, what happens if your data is too large to fit in memory, or you are streaming data that needs to be checked on the fly?
The answer is: checksum ports.
A checksum port is like any other REBOL port. Here's a quick example of how to compute an ongoing (streaming) checksum:
sport: open [scheme: 'checksum]
insert sport "this is some text"
insert sport "this is more text"
insert sport "this is the final text"
insert sport ...
update sport
sum: copy sport
close sport
print sum
The update function is required to compute the final checksum value. Without it, the copy function will return none.
The default algorithm for the checksum above is SHA1. The open line above is equivalent to writing:
sport: open [scheme: 'checksum algorithm: 'sha1]
If you want MD5 instead, use this line:
sport: open [scheme: 'checksum algorithm: 'md5]
I hope you find this checksum technique of value for your networking and file operations.
More here: http://www.rebol.net/article/0278.html
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09:01 pm
[stillcarl]
[Link] |
REBOL plugin problems...
Been trying out the new plugin, (see: http://www.rebol.com/web-plugin.html ), but can't get it to install on IE. The only install problem I had with Firefox was it installed the plugin files into a directory within plugins/ instead of into plugins/ itself. Manually moving the files fixed that.
IE though - blugh. The plugin downloads, but then IE refuses to install it, though it doesn't say why. And nothing has appeared in 'Downloaded Program Files'. I've ensured all the ActiveX options are ticked, but nothing happens. (I've had the old plugin working in the past - but I deleted it in the end because I didn't like ActiveX, err, active.)
Anyway, I'm planning to create a sticky-post in this journal filled with links to interesting pages that use the plugin - so if you know of any or have made any, make post about them. I'll then add their link to the sticky post, plus a link to your post so it can easily be found again.
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10:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Wed, 7 Jun 2006 21:58:26
Browser Plugin Update
You may have noticed that we released a REBOL/View 1.3.2 compatible version fo the browser plugin. Now, all of those nice draw demos can be done within your web browsers. In addition, we have a Firefox/Mozilla version of the plugin (but you must install it manually at this time).
The two big features we are working on right now are:
:Multi-DLL - to allow multiple instances of REBOL within a web page. Each is run as a separate process, independent of the other.
:Auto-update - makes it possible for us to update the REBOL plugin automatically. This is tricky because we want to provide a smooth upgrade method and not store each release of REBOL on your hard disk (unless it is an entirely new version of REBOL, such as 3.0).
We are also looking at a number of other features, as well as better support for installing in Firefox/Mozilla browsers (and eventually other browsers as well).
More here: http://www.rebol.net/article/0277.html
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07:34 pm
[stillcarl]
[Link] |
REBOL and Breastfeeding
As you all probably know, there's to be an LJ-wide protest over the next day or two. See Step apart from Six Apart on 06/06/06 for the details.
So...
Poll #742216
Open to: All, detailed results viewable to: AllThis community should be deleted on 06/06/06 for 24 hours or so...
I'm sure you all wanted the chance to have your say on the matter...
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08:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Wed, 24 May 2006 15:54:45
REBOL Road to France
For a few weeks near the end of June, we will be roaming around
France. For the first few days, we will be touring around the Paris
area, sightseeing. Then, we will be getting lost in the countryside of
south-west France in some quiet place within the Aquitaine
Region
(in English, sort of) between Toulouse and Bordeaux (close to Agen
and Moissac,
along the Garonne River).
For some of the trip, we will be travelling with our ballet troupe (Mendocino Ballet), but
there will be times when I hope to escape for lunch, wine, beer, or tour
with any REBOLers or Amigans that happen to be around these areas. I can
also drive a couple hours in any direction to meet up, should the timing
work out. I realize that our location is far from the busy city life, so
if schedule or distance is a problem... well then... I think I will
enjoy relaxing with the fine French food, wine, countryside... and write
even more creative and inspiring code working on REBOL 3.0.
If you think there is any chance of getting together in the Paris area
or in south-western France, we would very much welcome that. I don't think
that there will be time for any kind of official conference, but I do
hope to meet up with friendly REBOLers and Amigans alike. Contact us
at REBOL feedback and Cindy will work out the details.
Vers la fin juin, nous allons nous balader en France. Nous passerons
nos premiers jours en touristes dans la r
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11:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Wed, 24 May 2006 15:54:45
REBOL Road to France
For a few weeks near the end of June, we will be roaming around
France. For the first few days, we will be touring around the Paris
area, sightseeing. Then, we will be getting lost in the countryside of
south-west France in some quiet place within the Aquitaine
Region
(in English, sort of) between Toulouse and Bordeaux (close to Agen
and Moissac,
along the Garonne River).
For some of the trip, we will be travelling with our ballet troupe (Mendocino Ballet), but
there will be times when I hope to escape for lunch, wine, beer, or tour
with any REBOLers or Amigans that happen to be around these areas. I can
also drive a couple hours in any direction to meet up, should the timing
work out. I realize that our location is far from the busy city life, so
if schedule or distance is a problem... well then... I think I will
enjoy relaxing with the fine French food, wine, countryside... and write
even more creative and inspiring code working on REBOL 3.0.
If you think there is any chance of getting together in the Paris area
or in south-western France, we would very much welcome that. I don't think
that there will be time for any kind of official conference, but I do
hope to meet up with friendly REBOLers and Amigans alike. Contact us
at REBOL feedback and Cindy will work out the details.
PS: If someone can translate the above to French, I will post it here. Also, if you have a photo I can use of France (Paris or countryside) I would like to use it on the REBOL.net home page. Thanks!
More here: http://www.rebol.net/article/0276.html
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10:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Wed, 24 May 2006 15:54:45
REBOL Roads to France
For a few weeks near the end of June, we will be roaming around
France. For the first few days, we will be touring around the Paris
area, sightseeing. Then, we will be getting lost in the countryside of
south-west France in some quiet place within the Aquitaine
Region
(in English, sort of) between Toulouse and Bordeaux (close to Agen
and Moissac,
along the Garonne River).
For some of the trip, we will be travelling with our ballet troupe (Mendocino Ballet), but
there will be times when I hope to escape for lunch, wine, beer, or tour
with any REBOLers or Amigans that happen to be around these areas. I can
also drive a couple hours in any direction to meet up, should the timing
work out. I realize that our location is far from the busy city life, so
if schedule or distance is a problem... well then... I think I will
enjoy relaxing with the fine French food, wine, countryside... and write
even more creative and inspiring code working on REBOL 3.0.
If you think there is any chance of getting together in the Paris area
or in south-western France, we would very much welcome that. I don't think
that there will be time for any kind of official conference, but I do
hope to meet up with friendly REBOLers and Amigans alike. Contact us
at REBOL feedback and Cindy will work out the details.
PS: If someone can translate the above to French, I will post it here. Also, if you have a photo I can use of France (Paris or countryside) I would like to use it on the REBOL.net home page. Thanks!
More here: http://www.rebol.net/article/0276.html
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06:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Wed, 24 May 2006 15:54:45
REBOL Roads in France
For a few weeks near the end of June, we will be roaming around
France. For the first few days, we will be touring around the Paris
area, sightseeing. Then, we will be getting lost in the countryside of
south-west France in some quiet place within the Aquitaine
Region
(in English, sort of) between Toulouse and Bordeaux (close to Agen
and Moissac,
along the Garonne River).
For some of the trip, we will be travelling with our ballet troupe (Mendocino Ballet), but
there will be times when I hope to escape for lunch, wine, beer, or tour
with any REBOLers or Amigans that happen to be around these areas. I can
also drive a couple hours in any direction to meet up, should the timing
work out. I realize that our location is far from the busy city life, so
if schedule or distance is a problem... well then... I think I will
enjoy relaxing with the fine French food, wine, countryside... and write
even more creative and inspiring code working on REBOL 3.0.
If you think there is any chance of getting together in the Paris area
or in south-western France, we would very much welcome that. I don't think
that there will be time for any kind of official conference, but I do
hope to meet up with friendly REBOLers and Amigans alike. Contact us
at REBOL feedback and Cindy will work out the details.
PS: If someone can translate the above to French, I will post it here. Also, if you have a photo I can use of France (Paris or countryside) I would like to use it on the REBOL.net home page. Thanks!
More here: http://www.rebol.net/article/0276.html
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02:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Mon, 22 May 2006 14:17:03
Note: REBOL.com Feedback Outage
If you posted a feedback message (not a comment) or email to REBOL.com, to me directly, or to my blog since 17-May-2006, we probably did not receive it. Sorry! Please send it to us again.
What happened? It turns out that the file space quota system used by our web service provider simply ignores a file write when the quota has been reached. As a result, it appeared that email and CGI services were working fine (at the program level), but they were not.
To avoid this problem in the future: We've enhanced a few of our scripts to verify that file writes actually happen and to tell us (and you) if a failure occurred. At least that way we'll both know that there was a problem.
Again, sorry about that!
More here: http://www.rebol.net/article/0275.html
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05:53 pm
[stillcarl]
[Link] |
"The REBOL Week"
Just a note to mention The REBOL Week", a blog which aims to provide a weekly summary of REBOL news. Started by four long-time REBOL users.
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09:25 pm
[stillcarl]
[Link] |
Bigger in Poland than the US?
According to Google search trends, REBOL possibly is - with France its top country.
It's a very interesting list of top-10 countries...
1. France
2. Taiwan
3. Switzerland
4. Sweden
5. Belgium
6. Austria
7. Denmark
8. India
9. Canada
10. Poland
with only Canada being anything like an English-speaking country - though maybe it's the French speakers who're into REBOL there...
(I decided to compare it with RubyonRails for want of thinking of any better language. Any suggestions?)
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08:30 pm
[carlsblogalert]
[Link] |
Carl's Blog Alert
Thu, 4 May 2006 12:44:33
REBOL Bloat Busting
I've received a few feedbacks from people who are worried about REBOL 3.0 becoming bloated. Comments like:
I like the fact that REBOL/Core is only 220K and does not require
special libraries or installation. Please do not change that.
And, this one is even more blunt:
I have a concern that REBOL 3.0 will try to become more "like
the others" -- garbage like Python, Ruby, et. al, designed to
pander to the Corporate CIO brainless.
To this I say: Do not worry!
REBOL is all about being powerful but lightweight, and we're going to keep it that way. That's the REBOL way.
So far, even with several new datatypes and features, REBOL 3.0 is actually smaller and faster than prior versions. I cannot promise 3.0 will remain smaller (there's still more to do) but my point is... we're going to keep REBOL being REBOL: lean and mean.
I think part of the problem may have been the term programming in the large that I used in the REBOL 3.0 Roadmap. This term has a special meaning that could be misleading.
Programing in the large does not mean that the REBOL system or its programs must be large. You can still write a 10K program that does amazing things. The term actually means that if you do write large programs, you will have better internal mechanisms to manage them. For example, modules (namespaces) allow you to write sections of code without worrying about global words colliding with other parts of your code. Tasks allow you to easily create asynchronous sections of code.
Object attributes let you control how object fields are accessed and let you attach documentation to your objects (similar to functions).
So, let's keep REBOLing. Bloat is dead. Leaner is smarter.
\note Personal note:
I think most software and systems are insanely out of control. As a result, not only do they crash (e.g. my satellite TV receiver crashes almost daily), but they do not improve and adapt to user demands quickly. I think the world is doomed if that bigger-is-better approach continues to dominate modern software designs.
I cannot wait for the day when REBOL 3.0 lets us get our little reblets running not only on the desktop (all of them), but the same code runs on the set-top (TV) and the cell-phone!
"I want a REBOL-programmable cell-phone, and I want it now!"
/note
More here: http://www.rebol.net/article/0274.html
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