February 2015 - Pharo-users

Re: [Pharo-users] High precision arithmetic

by Marcus Denker

> On 02 Feb 2015, at 17:22, 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 Câ¦ > Then I found in http://stephane.ducasse.free.fr/Web/Draft/Float.pdf <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 <http://www.mpfr.org/> Marcus

Feb. 2, 2015

High precision arithmetic

by Pierre CHANSON

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

Re: [Pharo-users] New versions of the Pharo Launcher for Windows and MacOS

by stepharo

Damien even with the latest version of Launcher I have startup error. I can show you :) Stef

Feb. 2, 2015

Re: [Pharo-users] Pharo on Raspberry Pi 2

by Thierry Goubier

2015-02-02 16:01 GMT+01:00 Ben Coman <btc(a)openinworld.com>: > Which platform ?... > http://dev.windows.com/en-us/featured/raspberrypi2support > Oh, Linux for me will be perfect, thanks :) > > On Mon, Feb 2, 2015 at 9:21 PM, Ignacio Sniechowski <0800nacho(a)gmail.com> > wrote: > >> Thierry, >> Pharo runs in the previous RPI, the problem actually is not more >> horsepower but a JIT VM. >> I think Tim was working in that, but the VM is not quiet there yet. >> From my experience, Pharo at this stage is only barely usable. But if >> the VM was similar in specification to that of the x86 architecture I can >> bet that Pharo will run perfectly well doing some tricks. >> > I guessed as well. I was just considering how much more powerfull (and closer to standard ARM platforms?) the version 2 of the Pi seems to be. Thierry

Feb. 2, 2015

Re: [Pharo-users] Pharo on Raspberry Pi 2

by Sven Van Caekenberghe

Ubuntu of course https://insights.ubuntu.com/2015/02/02/snappy-ubuntu-core-on-raspberry-pi-2/ http://www.raspberrypi.org/downloads/ http://www.ubuntu.com/cloud/tools/snappy Seriously, Rasbian will still be the most used OS I guess. > On 02 Feb 2015, at 16:01, Ben Coman <btc(a)openInWorld.com> wrote: > > Which platform ?... > http://dev.windows.com/en-us/featured/raspberrypi2support > > On Mon, Feb 2, 2015 at 9:21 PM, Ignacio Sniechowski <0800nacho(a)gmail.com> wrote: > Thierry, > Pharo runs in the previous RPI, the problem actually is not more horsepower but a JIT VM. > I think Tim was working in that, but the VM is not quiet there yet. > From my experience, Pharo at this stage is only barely usable. But if the VM was similar in specification to that of the x86 architecture I can bet that Pharo will run perfectly well doing some tricks. > cheers > > > Lic. Ignacio Sniechowski, MBA > Prosavic SRL > > Tel: (011) 4542-6714 > > > > > > > > > > > > > > > > > > > > > > On Mon, Feb 2, 2015 at 9:35 AM, Thierry Goubier <thierry.goubier(a)gmail.com> wrote: > Hi all, > > given this announcement, what would this mean for Pharo on the Raspberry Pi 2? > > Thierry > > http://www.raspberrypi.org/raspberry-pi-2-on-sale/ > > Letâs get the good stuff out of the way above the fold. Raspberry Pi 2 is now on sale for $35 (the same price as the existing Model B+), featuring: > â¢ A 900MHz quad-core ARM Cortex-A7 CPU (~6x performance) > â¢ 1GB LPDDR2 SDRAM (2x memory) > â¢ Complete compatibility with Raspberry Pi 1 > Because it has an ARMv7 processor, it can run the full range of ARM GNU/Linux distributions, including Snappy Ubuntu Core, as well as Microsoft Windows 10. > > >

Feb. 2, 2015

Re: [Pharo-users] Pharo on Raspberry Pi 2

by Ben Coman

Which platform ?... http://dev.windows.com/en-us/featured/raspberrypi2support On Mon, Feb 2, 2015 at 9:21 PM, Ignacio Sniechowski <0800nacho(a)gmail.com> wrote: > Thierry, > Pharo runs in the previous RPI, the problem actually is not more > horsepower but a JIT VM. > I think Tim was working in that, but the VM is not quiet there yet. > From my experience, Pharo at this stage is only barely usable. But if the > VM was similar in specification to that of the x86 architecture I can bet > that Pharo will run perfectly well doing some tricks. > cheers > > > *Lic. Ignacio Sniechowski, MBA* > *Prosavic SRL* > > *Tel: (011) 4542-6714* > > > > > > > > > > > > > > > > > > > > > > On Mon, Feb 2, 2015 at 9:35 AM, Thierry Goubier <thierry.goubier(a)gmail.com > > wrote: > >> Hi all, >> >> given this announcement, what would this mean for Pharo on the Raspberry >> Pi 2? >> >> Thierry >> >> http://www.raspberrypi.org/raspberry-pi-2-on-sale/ >> >> Letâs get the good stuff out of the way above the fold. Raspberry Pi 2 is >> now on sale *for $35* (the same price as the existing Model B+), >> featuring: >> >> - A 900MHz quad-core ARM Cortex-A7 CPU (~6x performance) >> - 1GB LPDDR2 SDRAM (2x memory) >> - Complete compatibility with Raspberry Pi 1 >> >> Because *it has an ARMv7 processor*, it can run the full range of ARM >> GNU/Linux distributions, including Snappy Ubuntu Core, as well as Microsoft >> Windows 10. >> > >

Feb. 2, 2015

Re: [Pharo-users] [ANN] PUnQLite NoSQL database project updated

by Pierce Ng

On Thu, Jan 29, 2015 at 06:09:41PM -0000, PBKResearch wrote: > This looks very interesting. I am looking at a project which needs simple > persistence, and I was considering MongoDB plus Voyage, which looked like > overkill. I shall definitely be trying PUnQLite. You might want to try SimplePersistence, also maintained by Torsten. Pure Smalltalk, uses Fuel, no FFI. http://www.smalltalkhub.com/#!/~TorstenBergmann/SimplePersistence

Feb. 2, 2015

Re: [Pharo-users] Problem due to deprecation of class Url in Pharo 3 and Moose 5.0

by Sven Van Caekenberghe

https://pharo.fogbugz.com/f/cases/14855/Add-reference-resolution-to-ZnUrl > On 12 Jan 2015, at 09:57, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > Hi Peter, > >> On 11 Jan 2015, at 12:47, PBKResearch <peter(a)pbkresearch.co.uk> wrote: >> >> Sven >> >> Apologies for the delay in replying. >> >> Basically, the relative argument can be anything that occurs in a LINK tag >> in an HTML document. This can be anything from a file name to a complete >> address with only the 'http:' missing. >> >> I have found a couple of examples in a document from the Wikipedia >> 'Wiktionary', where I show in the attached workspace file the absolute >> address, the two relative addresses and the effect of combining using Url >> class>>#combine:withRelative and ZnUrl>>#inContextOf:. In each case the >> output of the Url class>>#combine:withRelative is the expected result; in >> the first case ZnUrl>>#inContextOf: gives the expected result, in the second >> it does not. >> >> The relative address in the second case seems a bit odd (why not include the >> 'http:' and make it absolute?), but it actually occurs (quite often in >> Wiktionary files at least) and the code needs to be able to deal with it. > > The problem is that ZnUrl>>#inContextOf: works with 2 parsed URL objects. However, relative URLs are not proper URLs and cannot be parsed nor represented as such. For example, 'foo/bar/readme.txt' and '/foo/bar/readme.txt' are the same. > > Relative URLs only exist while parsing and must then be resolved. Section 5 of RFC 3968 explains in details how to do that. This will have to be added to ZnUrl or to a helper class, but that will take some time. Luckily there are test cases in the document. > > Thanks for the feedback. > > Sven > >> Hope this helps. >> >> Peter Kenny >> >> -----Original Message----- >> From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of >> Sven Van Caekenberghe >> Sent: 10 January 2015 22:56 >> To: Any question about pharo is welcome >> Subject: Re: [Pharo-users] Problem due to deprecation of class Url in Pharo >> 3 and Moose 5.0 >> >> Peter, >> >>> On 10 Jan 2015, at 23:30, PBKResearch <peter(a)pbkresearch.co.uk> wrote: >>> >>>> Yes change the code of the Parser not to use old code. >>> As I pointed out, the Parser is a large and complex package, and I am >>> not the author, so this is easier said than done. It seems a bit odd >>> to dismiss code which worked OK in Moose 4.9, but not in Moose 5.0, as >>> 'old code.' It is code which has no functional equivalent in the new >>> code, as Sven has confirmed. >> >> Could you explain what arguments were given to the combine and what the >> expected output was/should be ? How does it use path merging ? >> >> Thx, >> >> Sven >> <CombineRelWithAbs.ws>

Feb. 2, 2015

Re: [Pharo-users] Pharo on Raspberry Pi 2

by Ignacio Sniechowski

Thierry, Pharo runs in the previous RPI, the problem actually is not more horsepower but a JIT VM. I think Tim was working in that, but the VM is not quiet there yet. >From my experience, Pharo at this stage is only barely usable. But if the VM was similar in specification to that of the x86 architecture I can bet that Pharo will run perfectly well doing some tricks. cheers *Lic. Ignacio Sniechowski, MBA* *Prosavic SRL* *Tel: (011) 4542-6714* On Mon, Feb 2, 2015 at 9:35 AM, Thierry Goubier <thierry.goubier(a)gmail.com> wrote: > Hi all, > > given this announcement, what would this mean for Pharo on the Raspberry > Pi 2? > > Thierry > > http://www.raspberrypi.org/raspberry-pi-2-on-sale/ > > Letâs get the good stuff out of the way above the fold. Raspberry Pi 2 is > now on sale *for $35* (the same price as the existing Model B+), > featuring: > > - A 900MHz quad-core ARM Cortex-A7 CPU (~6x performance) > - 1GB LPDDR2 SDRAM (2x memory) > - Complete compatibility with Raspberry Pi 1 > > Because *it has an ARMv7 processor*, it can run the full range of ARM > GNU/Linux distributions, including Snappy Ubuntu Core, as well as Microsoft > Windows 10. >

Feb. 2, 2015

Re: [Pharo-users] Nice review of Pharo by Example

by Sven Van Caekenberghe

Yes, cool 'external' review. > On 02 Feb 2015, at 13:43, Marcus Denker <marcus.denker(a)inria.fr> wrote: > > http://www.adamtornhill.com/reviews/pharobyexample.htm

Feb. 2, 2015