February 2015 - Pharo-users

Slides from the Pharo Status talk at FOSDEM 2015

by Marcus Denker

Hi, Here are the slides from my talk from yesterday: http://www.slideshare.net/MarcusDenker/2015-fosdempharo <http://www.slideshare.net/MarcusDenker/2015-fosdempharo> Marcus

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by Hilaire

Le 02/02/2015 19:11, Pierre CHANSON a Ã©crit : > > 2015-02-02 13:49 GMT-03:00 stepharo > <stepharo(a)free.fr > <mailto:stepharo@free.fr>>: > > Pay attention ScaledDecimal are just fraction. > > > Yes sure but I think it would be ok for me later, for example using > ScaledDecimal readFrom: '0.000006515031360099368', then I can manipulate > this. As informative as it could be, in computation it appears to me ScaledDecimal are slower than Float. Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by Marcus Denker

> On 02 Feb 2015, at 17:58, phil(a)highoctane.be wrote: > > On Mon, Feb 2, 2015 at 5:22 PM, Pierre CHANSON <chans.pierre(a)gmail.com <mailto:chans.pierre@gmail.com>> wrote: > Hi everyone, > I was wondering if there was a package to manipulate floats like the MPFR library in C... > > One issue with MPFR is the licensing, which is GNU. > > I wonder if Pharo couldn't get a special licence for embedding as "MPFR has continuously been supported by the INRIA <http://www.inria.fr/>...". > > Pharo is now 32-bit and uses the floatplugin to do the actual fast math. > > Pharo with the 64-bit system will be able to do better and the float plugin will have to be rewritten anyway. > > But MPFR could be put into a plugin. > > As far as I am concerned, I'd rather get something based on GMP (https://gmplib.org/ <https://gmplib.org/>) but we are there in GNU territory. Which is not what I want for commercial apps. > > This table: http://www.mpfr.org/mpfr-current/timings.html <http://www.mpfr.org/mpfr-current/timings.html> is showing some LGPL licencing that may be easier to deal with. But for sure, none of that is MIT :-( Libc on unix is LGPL, tooâ¦ it works well for C style libraries. Marcus

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by Pierre CHANSON

2015-02-02 13:51 GMT-03:00 Werner Kassens <wkassens(a)libello.com>: > Hi Pierre, > you will find an ArbitraryPrecisionFloat package at sqeaksource that works > eg in pharo3 & 4: > http://www.squeaksource.com/ArbitraryPrecisionFl.html > Thanks Werner, I will have a look

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by Pierre CHANSON

2015-02-02 13:49 GMT-03:00 stepharo <stepharo(a)free.fr>: > Pay attention ScaledDecimal are just fraction. Yes sure but I think it would be ok for me later, for example using ScaledDecimal readFrom: '0.000006515031360099368', then I can manipulate this.

Feb. 2, 2015

R: Re: Standalone GUI

by falzonidavide＠libero.it

Hi Clement, So how can I prevent a user to execute a doIt? Blocking the opening of windows? Francis ----Messaggio originale---- Da: clement.bera(a)inria.fr Data: 1-feb-2015 9.46 A: "Any question about pharo is welcome"<pharo-users(a)lists.pharo.org>, "falzonidavide(a)libero.it"<falzonidavide(a)libero.it> Ogg: Re: [Pharo-users] Standalone GUI On Jan 31, 2015 10:33 PM, "falzonidavide(a)libero.it" <falzonidavide(a)libero.it> wrote: > > Hi guys, > > How can I make a standalone pharo installation that starts on a GUI? > Yes. In the start up list you add code opening the ui you need. > About the gui: my first idea was to use Morphic, but then user has access to all the source code, am I right? > Morphic is orthogonal to source code access. It is a tool for building ui. some ui access source code, some don't. You can build widgets accessing something else than source code. Note that as long as the user can execute a doit, he can access your source code by guessing a class/method name. Consider the other frameworks for building ui on top of morphic too: Spec, a ui descriptor framework allowing you to deploy on morphic and on native uis Glamour, a framework for fast ui implementation > Thanks > Francis Best Clement

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by phil＠highoctane.be

On Mon, Feb 2, 2015 at 5:22 PM, Pierre CHANSON <chans.pierre(a)gmail.com> wrote: > Hi everyone, > I was wondering if there was a package to manipulate floats like the MPFR > library in C... > One issue with MPFR is the licensing, which is GNU. I wonder if Pharo couldn't get a special licence for embedding as "MPFR has continuously been supported by the INRIA <http://www.inria.fr/>...". Pharo is now 32-bit and uses the floatplugin to do the actual fast math. Pharo with the 64-bit system will be able to do better and the float plugin will have to be rewritten anyway. But MPFR could be put into a plugin. As far as I am concerned, I'd rather get something based on GMP ( https://gmplib.org/) but we are there in GNU territory. Which is not what I want for commercial apps. This table: http://www.mpfr.org/mpfr-current/timings.html is showing some LGPL licencing that may be easier to deal with. But for sure, none of that is MIT :-( Phil > Then I found in http://stephane.ducasse.free.fr/Web/Draft/Float.pdf that > using ScaledDecimal allows exact arithmetics. So I guess ScaledDecimal is > the best class to use for playing with 20 decimals numbers ? :) > > Thanks ! > > Pierre >

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by stepharo

>> Then I found in http://stephane.ducasse.free.fr/Web/Draft/Float.pdf >> that using ScaledDecimal allows exact arithmetics. So I guess >> ScaledDecimal is the best class to use for playing with 20 decimals >> numbers ? :) >> > > I always thought that we should look into using MPFR. > > There is no way that we have the knowledge or manpower to recreate that. > > > http://www.mpfr.org Indeed we could define a plugin. > > Marcus >

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by Werner Kassens

Hi Pierre, you will find an ArbitraryPrecisionFloat package at sqeaksource that works eg in pharo3 & 4: http://www.squeaksource.com/ArbitraryPrecisionFl.html werner

Feb. 2, 2015

Re: [Pharo-users] High precision arithmetic

by stepharo

Pay attention ScaledDecimal are just fraction. Le 2/2/15 17:22, Pierre CHANSON a Ã©crit : > Hi everyone, > I was wondering if there was a package to manipulate floats like the > MPFR library in C... > Then I found in http://stephane.ducasse.free.fr/Web/Draft/Float.pdf > that using ScaledDecimal allows exact arithmetics. So I guess > ScaledDecimal is the best class to use for playing with 20 decimals > numbers ? :) > > Thanks ! > > Pierre

Feb. 2, 2015