October 2017 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Equals and HashCode Builder

by Sean P. DeNigris

Denis Kudriashov wrote > I just use RBGenerateEqualHashRefactoring for this: > > r := RBGenerateEqualHashRefactoring className: MyClass variables: #(vars > which should be used in equal and hash). > r execute That is sooooo cool! I shudder to think how many times I implemented just that by hand!! Two questions/comments about the generated code: 1. #= ... self class = anObject class "should compare #species instead?" ifFalse: [ ^ false ]. ... Typically, I've seen #species instead of #class in the guard statement. Should we change it to that? 2. #hash ^ var1 hash bitXor: (var2 hash bitXor: var3 hash) Is this implementation always safe? It's what I usually hand roll based on what I've seen, but Andres Valloud wrote a whole (large) book on hashing, so I've always wondered if I was missing somethingâ¦ ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Oct. 2, 2017

[Demo] Creating Bloc widgets: A Color Panel

by Stephan Eggermont

Bloc is ready for your experiments. Here is my second one. Please let me know what and how to improve. Bloc allows for the easy creation of beautiful widgets. Here is a simple color panel that allows custom colors to be added (using the current Morphic color selector dialog) and allows colors to be applied using drag-and-drop. https://vimeo.com/236419682 Stephan

Oct. 2, 2017

Re: [Pharo-users] Equals and HashCode Builder

by Vitor Medina Cruz

*in java, because this is a pain to do it each time.* *for us, maybe for the sameâ¦ even if is a lot easier.* Yeah, and it is boring to implement that every time, especially because it is tricky to get it right sometimes. Another interesting thing I use in Java to test my equals and hash implementation is the http://jqno.nl/equalsverifier/ I just use RBGenerateEqualHashRefactoring for this: Oh! That is nice, I will give a deeper look at it, I think this may do the job. Thanks! On Mon, Oct 2, 2017 at 10:09 AM, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > Publish it in a package and let us have a look. > > > On Mon, Oct 2, 2017 at 9:53 AM, Jose San Leandro <jose.sanleandro(a)osoco.es > > wrote: > >> Hi, >> >> I wrote a generator for that. Probably it makes no sense to publish it as >> a standalone project. I tend to think code generation fits better in other >> languages. >> I can paste the relevant code here if needed. >> >> 2017-10-02 9:44 GMT+02:00 Esteban Lorenzano <estebanlm(a)gmail.com>: >> >>> in java, because this is a pain to do it each time. >>> for us, maybe for the sameâ¦ even if is a lot easier. >>> >>> Esteban >>> >>> >>> On 2 Oct 2017, at 09:42, Stephane Ducasse <stepharo.self(a)gmail.com> >>> wrote: >>> >>> Not that I know. >>> Because it can be a little project. >>> Now what is the key point to encapsulate this computation? >>> >>> On Mon, Oct 2, 2017 at 12:51 AM, Vitor Medina Cruz <vitormcruz(a)gmail.com >>> > wrote: >>> >>>> Hello! >>>> >>>> Is there, in Pharo, builders for equals (=) and hash messages similar >>>> to: https://commons.apache.org/proper/commons-lang/javadocs/api- >>>> release/org/apache/commons/lang3/builder/EqualsBuilder.html >>>> >>>> and >>>> >>>> https://commons.apache.org/proper/commons-lang/javadocs/api- >>>> release/org/apache/commons/lang3/builder/HashCodeBuilder.html? >>>> >>>> Thanks in advance, >>>> Vitor >>>> >>>> >>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> Livre >>>> de vÃrus. www.avg.com >>>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…>. >>>> >>>> >>> >>> >>> >> >

Oct. 2, 2017

Re: [Pharo-users] Organisation and workflows

by Esteban Lorenzano

> On 2 Oct 2017, at 15:12, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > > I discussed with esteban sooner this summer and we really want to have a process > where people can deploy applications and not just code. > Now we are not yet there. > > Stef > > On Sun, Oct 1, 2017 at 9:03 PM, Steven R. Baker <steven(a)stevenrbaker.com> wrote: >> Heya folks, >> >> [Please jump on any of my statements that sound crazy: use of Spec, >> other assumptions, etc.] >> >> I'm starting an application in Pharo, using Spec. Basically, a GTD >> application in the spirit of nirvanahq, omnifocus, things, nozbe. The >> code is working just fine, but I'm left with a lot of questions about >> how to organize it. >> >> First, is there some trick to managing images? Are people using >> one-per-project, or one-per-computer? All of the above? Anyone using >> PharoLauncher these days? Other tools? pharo users tend to prefer one-per-project approach :) most people uses (or should use) pharo launcher. In fact, we want to make it the default download, is just that to get it right is complicated :) butâ¦ pharo launcher is to developers. A final app would require other stuff to be accomplished (like closing development tools, etc.). >> I'm assuming that the current state of the art is Iceberg; where can I >> find a "This is how you should organize your project using Iceberg" >> document, blog, book, tutorial, video, or otherwise. beware: Iceberg is a cvs (like Monticello or git or svnâ¦): it is use to store code, not to organise your project. To organise your project you have Metacello. >> >> Once the application is done, I assume I'll want to ship it in a minimal >> Pharo image. Is there documentation or prior art on this? this is what is hard :) I imagine with the headless VMs we are about to finish it will be easier (to just initiate a window with your app, instead initiate a window with the full world as now). but we still require some work. >> Finally, is there a way to run and capture keybindings globally? I have >> one part of my application (a quick-entry window) which I want summoned >> from a global (OS-wide) hotkey. Has this been done before? Or is it not >> easy to break the fourth wall, so to speak, and register a global >> keybinding from inside the VM? there is a keybindings framework inside pharo, but since you have a lot of development tools, it becomes hard to use (again, something that can be solved in the near future, with same approach as before, but not yet). now, to get the keybindings of the system you will need to install that *in* the system. for mac, for example, you can doit using the ObjC bridge (which does not works in 64bit images... Iâm working on a UFFI replacement, butâ¦ guess what? not yet :P) and I guess using UFFI you can get that to work on windows and linux? Iâm really donât know. all you ask is *doable*â¦ but not all your requirements are *easily* doable right now, which is want I want to fix :) Esteban >> >> Thanks! >> >> -Steven >> >> >> >

Oct. 2, 2017

Re: [Pharo-users] Reading a text file line by line

by Stephane Ducasse

Yes this is why we should continue to clean and remove cruft. Now I remember that guille did that for File. Stef On Mon, Oct 2, 2017 at 3:20 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > If you do > > (File named: '/tmp/lines.txt') readStream[Do:] > > you seem to get a binary stream (this is the new implementation I guess), when you go via FileReference you get a character stream (but that are old ones). > > I know, very confusing. We're always in the midst of transitions. > >> On 2 Oct 2017, at 15:17, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: >> >> Sven I do not see the binary stream. Is it ZnCharacterReadStream? >> >> Stef >> >> On Mon, Oct 2, 2017 at 1:22 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >>> Hi, >>> >>>> On 2 Oct 2017, at 13:07, Dirk Olmes <dirk(a)xanthippe.ping.de> wrote: >>>> >>>> Hi, >>>> >>>> I'm trying to get started with Pharo doing something really simple - at >>>> least that's what I thought ... I'm trying to read a text file line by line. >>>> >>>> If I use File named: '/tmp/linex.txt' readStream nextLine I'll get a >>>> debugger telling me that BinaryFileStream does not understand nextLine. >>>> >>>> Now I've tried my best to find a stream that may be reading plain text >>>> lines but to no avail ... >>>> >>>> Help! >>>> >>>> -dirk >>> >>> $ cat > /tmp/lines.txt >>> one >>> two >>> three >>> >>> (FileLocator temp / 'lines.txt') contents lines. >>> >>> '/tmp/lines.txt' asFileReference contents lines. >>> >>> '/tmp/lines.txt' asFileReference readStreamDo: [ :in | >>> Array streamContents: [ :out | >>> [ in atEnd ] whileFalse: [ out nextPut: in nextLine ] ] ]. >>> >>> (File named: '/tmp/lines.txt') readStreamDo: [ :in | >>> | characterStream | >>> characterStream := ZnCharacterReadStream on: in. >>> Array streamContents: [ :out | >>> [ characterStream atEnd ] whileFalse: [ out nextPut: characterStream nextLine ] ] ]. >>> >>> They all return #('one' 'two' 'three'). >>> >>> In the last, more complex example, you first get a binary stream (and a 'line' is a character based concept), so wrapping the binary stream in a character read stream (which does know about lines) solves the problem. >>> >>> HTH, >>> >>> Sven >> > >

Oct. 2, 2017

Re: [Pharo-users] Reading a text file line by line

by Sven Van Caekenberghe

If you do (File named: '/tmp/lines.txt') readStream[Do:] you seem to get a binary stream (this is the new implementation I guess), when you go via FileReference you get a character stream (but that are old ones). I know, very confusing. We're always in the midst of transitions. > On 2 Oct 2017, at 15:17, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > > Sven I do not see the binary stream. Is it ZnCharacterReadStream? > > Stef > > On Mon, Oct 2, 2017 at 1:22 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >> Hi, >> >>> On 2 Oct 2017, at 13:07, Dirk Olmes <dirk(a)xanthippe.ping.de> wrote: >>> >>> Hi, >>> >>> I'm trying to get started with Pharo doing something really simple - at >>> least that's what I thought ... I'm trying to read a text file line by line. >>> >>> If I use File named: '/tmp/linex.txt' readStream nextLine I'll get a >>> debugger telling me that BinaryFileStream does not understand nextLine. >>> >>> Now I've tried my best to find a stream that may be reading plain text >>> lines but to no avail ... >>> >>> Help! >>> >>> -dirk >> >> $ cat > /tmp/lines.txt >> one >> two >> three >> >> (FileLocator temp / 'lines.txt') contents lines. >> >> '/tmp/lines.txt' asFileReference contents lines. >> >> '/tmp/lines.txt' asFileReference readStreamDo: [ :in | >> Array streamContents: [ :out | >> [ in atEnd ] whileFalse: [ out nextPut: in nextLine ] ] ]. >> >> (File named: '/tmp/lines.txt') readStreamDo: [ :in | >> | characterStream | >> characterStream := ZnCharacterReadStream on: in. >> Array streamContents: [ :out | >> [ characterStream atEnd ] whileFalse: [ out nextPut: characterStream nextLine ] ] ]. >> >> They all return #('one' 'two' 'three'). >> >> In the last, more complex example, you first get a binary stream (and a 'line' is a character based concept), so wrapping the binary stream in a character read stream (which does know about lines) solves the problem. >> >> HTH, >> >> Sven >

Oct. 2, 2017

Re: [Pharo-users] X11 options on Ubuntu VM / Athens rendering problems

by Stephane Ducasse

How could we help? On Sun, Oct 1, 2017 at 9:14 PM, Hilaire <hilaire(a)drgeo.eu> wrote: > I had situation where the system libcairo:i386 does not work with Dr.Geo[1], > Pharo crashes with what looks like a Cairo crash! Looks like not a Pharo > fault, but I am definitely stuck. > > It is problematic, it is a system (LinuxMint based) used in Geneva primary > schools and Dr. Geo was expected to be used there :( > > Hilaire > > [1] http://forum.world.st/Cairo-related-crash-with-Dr-Geo-tt4952023.html > > > Le 01/10/2017 Ã 19:50, Igor Stasenko a Ã©crit : >> >> >> All these difficulties are good argument to get the appropriate >> libcairo/libpng shipped with the Linux VM, as done with Windows >> and MacOSX VM >> >> Nah, in my case, there's nothing that can be lableled as "Pharo fault". It >> is definitely a linux/ubuntu ecosystem fault. - by not providing parallel >> updates for 32 & 64 bit variant of same library. > > > -- > Dr. Geo > http://drgeo.eu > > >

Oct. 2, 2017

Re: [Pharo-users] Reading a text file line by line

by Stephane Ducasse

Sven I do not see the binary stream. Is it ZnCharacterReadStream? Stef On Mon, Oct 2, 2017 at 1:22 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > Hi, > >> On 2 Oct 2017, at 13:07, Dirk Olmes <dirk(a)xanthippe.ping.de> wrote: >> >> Hi, >> >> I'm trying to get started with Pharo doing something really simple - at >> least that's what I thought ... I'm trying to read a text file line by line. >> >> If I use File named: '/tmp/linex.txt' readStream nextLine I'll get a >> debugger telling me that BinaryFileStream does not understand nextLine. >> >> Now I've tried my best to find a stream that may be reading plain text >> lines but to no avail ... >> >> Help! >> >> -dirk > > $ cat > /tmp/lines.txt > one > two > three > > (FileLocator temp / 'lines.txt') contents lines. > > '/tmp/lines.txt' asFileReference contents lines. > > '/tmp/lines.txt' asFileReference readStreamDo: [ :in | > Array streamContents: [ :out | > [ in atEnd ] whileFalse: [ out nextPut: in nextLine ] ] ]. > > (File named: '/tmp/lines.txt') readStreamDo: [ :in | > | characterStream | > characterStream := ZnCharacterReadStream on: in. > Array streamContents: [ :out | > [ characterStream atEnd ] whileFalse: [ out nextPut: characterStream nextLine ] ] ]. > > They all return #('one' 'two' 'three'). > > In the last, more complex example, you first get a binary stream (and a 'line' is a character based concept), so wrapping the binary stream in a character read stream (which does know about lines) solves the problem. > > HTH, > > Sven

Oct. 2, 2017

Re: [Pharo-users] Organisation and workflows

by Stephane Ducasse

I discussed with esteban sooner this summer and we really want to have a process where people can deploy applications and not just code. Now we are not yet there. Stef On Sun, Oct 1, 2017 at 9:03 PM, Steven R. Baker <steven(a)stevenrbaker.com> wrote: > Heya folks, > > [Please jump on any of my statements that sound crazy: use of Spec, > other assumptions, etc.] > > I'm starting an application in Pharo, using Spec. Basically, a GTD > application in the spirit of nirvanahq, omnifocus, things, nozbe. The > code is working just fine, but I'm left with a lot of questions about > how to organize it. > > First, is there some trick to managing images? Are people using > one-per-project, or one-per-computer? All of the above? Anyone using > PharoLauncher these days? Other tools? > > I'm assuming that the current state of the art is Iceberg; where can I > find a "This is how you should organize your project using Iceberg" > document, blog, book, tutorial, video, or otherwise. > > Once the application is done, I assume I'll want to ship it in a minimal > Pharo image. Is there documentation or prior art on this? > > Finally, is there a way to run and capture keybindings globally? I have > one part of my application (a quick-entry window) which I want summoned > from a global (OS-wide) hotkey. Has this been done before? Or is it not > easy to break the fourth wall, so to speak, and register a global > keybinding from inside the VM? > > Thanks! > > -Steven > > >

Oct. 2, 2017

Re: [Pharo-users] Equals and HashCode Builder

by Stephane Ducasse

Publish it in a package and let us have a look. On Mon, Oct 2, 2017 at 9:53 AM, Jose San Leandro <jose.sanleandro(a)osoco.es> wrote: > Hi, > > I wrote a generator for that. Probably it makes no sense to publish it as > a standalone project. I tend to think code generation fits better in other > languages. > I can paste the relevant code here if needed. > > 2017-10-02 9:44 GMT+02:00 Esteban Lorenzano <estebanlm(a)gmail.com>: > >> in java, because this is a pain to do it each time. >> for us, maybe for the sameâ¦ even if is a lot easier. >> >> Esteban >> >> >> On 2 Oct 2017, at 09:42, Stephane Ducasse <stepharo.self(a)gmail.com> >> wrote: >> >> Not that I know. >> Because it can be a little project. >> Now what is the key point to encapsulate this computation? >> >> On Mon, Oct 2, 2017 at 12:51 AM, Vitor Medina Cruz <vitormcruz(a)gmail.com> >> wrote: >> >>> Hello! >>> >>> Is there, in Pharo, builders for equals (=) and hash messages similar >>> to: https://commons.apache.org/proper/commons-lang/javadocs/api- >>> release/org/apache/commons/lang3/builder/EqualsBuilder.html >>> >>> and >>> >>> https://commons.apache.org/proper/commons-lang/javadocs/api- >>> release/org/apache/commons/lang3/builder/HashCodeBuilder.html? >>> >>> Thanks in advance, >>> Vitor >>> >>> >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> Livre >>> de vÃrus. www.avg.com >>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…>. >>> >>> >> >> >> >

Oct. 2, 2017