- Pharo-users - lists.pharo.org

Re: [Pharo-users] Pharo on OpenSUSE (FFI / libgit2 errors)

by pmissech

Arkaitzmugica posted this on discord, which worked for him. Since the problems were similar, that may be relevant for you (or other people) 12:28 AM/]/arkaitzmugica/:/ I've made Pharo work on Fedora 31. First libgit2-devel must be installed. Then sudo ln -s /lib64/libcurl.so.4 /lib64/libcurl-gnutls.so.4 And the last step is following the instructions related with some security parameters: you must create a file, /etc/security/limits.d/pharo.conf cat pharo.conf * hard rtprio 2 * soft rtprio 2 Reboot, and pharo works fine. /[/12:32 AM/]/arkaitzmugica/:/ If working with 'toolbox' command line tool, like me, because I'm using Fedora 31 Silverblue, you should keep this in mind too when creating a container with a custom Dockerfile. /[/12:34 AM/]/arkaitzmugica/:/ I haven't tested, but I think it could work also for Centos and RHEL. Pierre. On 12/01/2020 19:52, Jan BlizniÄenko wrote: > So it seems the good old > ln -s /usr/lib64/libcurl.so.4 (path to > pharo)/pharo-vm/lib/pharo/(version)/libcurl-gnutls.so.4 > still works after all, just not with Pharo Launcher VM (where it causes > segfault). With regular VMs downloaded either manually or via the Launcher > itself it works. > > Too bad it makes Launcher unusable on both systems for both reasons (cannot > hotfix launcher itself and have to hotfix all VMs it downloads). > > Jan > > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

Jan. 14, 2020

Re: [Pharo-users] As promised, the sequel!

by horrido

Thanks, Ted. Yes, I chose red for the Tesla because it complements the blue I chose for the Maserati. You see, everything I do has a reason. I was also wondering what other technologies have undergone a revival. To be honest, it's hard to come up with anything. (Even the Buratino rocket launcher fits in with this motif. Three vehicles, all with a similar visual orientation.) I suppose I could cite Objective-C as an example. In the late 1980s, it was chosen by Steve Jobs' NeXT company for developing their software. As we all know, NeXT ultimately failed and along with it, Objective-C. Many years later, Apple's iPhone made Objective-C the darling of the IT world. This was a tremendous revival. The problem with this story is that NeXT/Objective-C was never /really/ that popular to begin with. Maybe I can cite the audio turntable. It was once very popular. Then it died with the arrival of the CD. In recent years, vinyl records have again found a following. tbrunz wrote > Thanks, xap! Great sequel, Richard. I really like the lead image, too. > (Red was a good choice.) > > This makes me wonder what other technology turn-arounds and revivals exist > in history... ;^) > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 14, 2020

Re: [Pharo-users] Floating point arithmetic

by Pierce Ng

On Tue, Jan 14, 2020 at 12:41:51AM +1300, Richard O'Keefe wrote: > Squeak and Pharo interpret as "rational number *printed* in > decimal form but not *computed* using decimal arithmetic", so > that can give extremely confusing results too. Can you expand on this please? For money-related calculations I have been using HernÃ¡n Morales Durand's FixedDecimal: https://github.com/hernanmd/FixedDecimal. Pierce

Jan. 14, 2020

Re: [Pharo-users] Floating point arithmetic

by Pierce Ng

On Sun, Jan 12, 2020 at 02:13:00PM -0600, Donald Howard wrote: > "What are other suggestions, workarounds or approaches community has?" This is a good read on the subject: https://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html Title is "What every computer scientist should know about floating point arithmetic". Pierce

Jan. 14, 2020

Re: [Pharo-users] Grafoscopio accepted at FOSDEM :-)... Now looking for travel funds :-/

by Offray Vladimir Luna CÃ¡rdenas

Hi again, FOSDEM is approaching and I don't think I will get an sponsor in such brevity. Santiago, Phill, are you willing to take care of this talk? I can coach and support you, if needed. The details about the proposal are here: https://fosdem.org/2020/schedule/event/open_research_pocket_infrastructures/ Cheers, Offray On 19/12/19 4:30 p.Â m., Offray Vladimir Luna CÃ¡rdenas wrote: > Hi, > > The subject pretty much resumes the current situation: organizers at > FOSDEM[1] approved my talk about Grafoscopio for the 2020 version (Feb 1 > and 2). They tell me that they don't provide travel funds, but because I > spoke about the voluntary and self funded nature of the project and > asked for travel funds, the usual route here is trying to find an > entity, located in Brussels that would be interested in some workshops > about the tool and that will cover travel expenses. Ideally such entity > would be related with the subjects and themes we have been working with > the Grafoscopio community: civic tech, hacktivism, reproducible > research, data journalism, data feminism, critical science and > technology studies, open data, collective writing self publishing and > book sprints. > > As you can see, Grafoscopio and its community are pretty versatile and > diverse in their concerns and approaches, so I hope that opens > possibilities for a lot of interested sponsors, located in Brussels. > Even sponsors in Europe could work, as internal travel is kind of cheap > and the biggest part of the expenses are inter continental travel. I > don't know of any particular European entity that could sponsor my > travel funds for FOSDEM, but hopefully the European pharoers know of > some. The FOSDEM organizers asked me for some possible entities so, I'm > all ears :-) > > Santiago and Phill, any particular ideas? If not, remember that we can > prepare a remote talk :-) > > [1] https://fosdem.org/2020/ > > Thanks, > > Offray > > >

Jan. 14, 2020

Re: [Pharo-users] As promised, the sequel!

by tbrunz

Thanks, xap! Great sequel, Richard. I really like the lead image, too. (Red was a good choice.) This makes me wonder what other technology turn-arounds and revivals exist in history... ;^) -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 13, 2020

Re: [Pharo-users] [ANN] Embedding Image Example (Win)

by ducasse

this is really nice. This is with such nice example that people will be able to build App with Pharo. Thanks Pablo I like C code with nice comments :). > On 13 Jan 2020, at 14:32, tesonep(a)gmail.com wrote: > > Hi,

Jan. 13, 2020

Re: [Pharo-users] [Pharo-dev] [ANN] Embedding Image Example (Win)

by Ben Coman

Thanks Pablo. This will be cool to try sometime, and likely useful if I want to distribute an app. Now what woudl be great is an example something like embedding the VM within a simple REPL written in C. or something like a simple Pong game where the main loop is in C and does the rendering, but the game logic run in Pharo. cheers -ben On Mon, 13 Jan 2020 at 21:34, tesonep(a)gmail.com <tesonep(a)gmail.com> wrote: > Hi, > I have produced an example of using the headless VM to have an > embedded image in Windows. The example is hosted in Github > (https://github.com/tesonep/pharo-vm-embedded-example) > > The example is a CMake project to generate a new small executable that > uses the VM as a library. Also, it shows how to perform the branding > of applications (I have used the same Pharo icon, but we can use > anything else). > > In the example, I am opening one of the SDL2 examples, it opens a > window where we can draw in an Athens Canvas. > > It requires a Cygwin environment, but if you are able to build the > headless VM you already have it!. > > I will do other examples of the use case we are thinking for the headless > VM! > > Cheers, > Pablo > > -- > Pablo Tesone. > tesonep(a)gmail.com > >

Jan. 13, 2020

Re: [Pharo-users] Floating point arithmetic

by Sven Van Caekenberghe

Ah, yes, yes, sending #asScaledDecimal to a Float is too late, the precision is already lost. It makes total sense now. Thank you, Werner, for the explanation. > On 13 Jan 2020, at 16:13, werner kassens <wkassens(a)libello.com> wrote: > > Hi Sven, > > if you dont transform floats, that are not always exactly what they seem > to be, you get what you would expect: > 0.09560268s8 - 0.005s8 = 0.09060268s8. "true" > "of course" > a:=0.09560268 asScaledDecimal. > 0.09560268s8=a . "false" > "you could eg do this:" > b:=a roundTo: 0.00000001s8. > "then" > 0.09560268s8=b . "true" > > but if you do something like this generally in Float>>asScaledDecimal > you could loose some precision that could be unwanted in some other > circumstances (or perhaps not). > > werner > > On 1/13/20 2:13 PM, Sven Van Caekenberghe wrote: >> 0.09560268 asScaledDecimal - 0.005 asScaledDecimal = 0.09060268s8. "false" >

Jan. 13, 2020

Re: [Pharo-users] Floating point arithmetic

by werner kassens

Hi Sven, if you dont transform floats, that are not always exactly what they seem to be, you get what you would expect: 0.09560268s8 - 0.005s8 = 0.09060268s8. "true" "of course" a:=0.09560268 asScaledDecimal. 0.09560268s8=a . "false" "you could eg do this:" b:=a roundTo: 0.00000001s8. "then" 0.09560268s8=b . "true" but if you do something like this generally in Float>>asScaledDecimal you could loose some precision that could be unwanted in some other circumstances (or perhaps not). werner On 1/13/20 2:13 PM, Sven Van Caekenberghe wrote: > 0.09560268 asScaledDecimal - 0.005 asScaledDecimal = 0.09060268s8. "false"

Jan. 13, 2020