April 2012 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] Parsing and navigating Html
by Paul DeBruicker July 16, 2020

July 16, 2020

On 12/05/2010 06:02 AM, pharo-project-request(a)lists.gforge.inria.fr wrote: > From: St?phane Ducasse<stephane.ducasse(a)inria.fr> > Subject: [Pharo-project] Parsing and navigating Html > To:"Pharo-project(a)lists.gforge.inria.fr Development" > <Pharo-project(a)lists.gforge.inria.fr> > Message-ID:<1C53DFD8-3021-4233-BC83-CE8C1EA8D103(a)inria.fr> > Content-Type: text/plain; charset=us-ascii > > Hi > > I would like extract partial information from HTML pages. > So I started to play and fix HTMLParser. > > Now does anybody know alternatives? > > Second, does anybody develop a lib to query HTML structure as with the XMLSupport package? > > Stef The Soup package on SqueakSource.com works OK.

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[Pharo-project] About ~= and ~~
by Clara Allende Nov. 26, 2016

Nov. 26, 2016

Hi guys, I'm wondering, why? ProtoObject>> ~~ anObject "Answer whether the receiver and the argument are not the same object (do not have the same object pointer)." self == anObject ifTrue: [^ false] ifFalse: [^ true] Instead of: ProtoObject>> ~~ anObject "Answer whether the receiver and the argument are not the same object (do not have the same object pointer)." ^(self == anObject) not And why? Object >> ~= anObject "Answer whether the receiver and the argument do not represent the same object." ^self = anObject == false Instead of Object>> ~= anObject "Answer whether the receiver and the argument do not represent the same object." ^(self = anObject) not. Is there any particular reason for this that I'm missing? Thanks in advance! -- "*Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program.*" Linus Torvalds

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[Pharo-project] Do we have the new primitive?? [WAS] Re: IdentitySet but using #hash rather than #identityHash ?
by Mariano Martinez Peck Dec. 16, 2015

Dec. 16, 2015

> All I can say is that I am impressed by the numbers it is really much >> faster. >> I still don't understand why I send this email with a subject say >> IdentitySet because what I really need is a fast/large IdentityDictionary >> :( Anyway, there's a place where we can use this LargeIdentitySet in Fuel >> I think). >> >> So Levente, you say this is not possible to adapt this for dictionary? >> can >> we contact Eliot to provide such a primitive? >> > > As promised, I uploaded my LargeIdentityDictionary implementation to > http://leves.web.elte.hu/**squeak/**LargeIdentityDictionary.st<http://leves.web.elte.hu/squeak/LargeIdentityDictionary.st>. > The numbers will be a bit worse compared to LargeIdentitySet, because of > the lack of the primitive, but it's still 2-3x faster than other solutions > (IdentityDictionary, PluggableIdentityDictionary, subclassing, etc). I'm > about to propose this primitive with other improvements on the vm-dev list. > > Hi Eliot/Levente. What is the status of this? Do we have already the new primitive? If true, how can we adapt LargeIdentitySet to use such new primitive? Thanks! > > Levente > > >> thanks >> >> On Fri, Dec 16, 2011 at 3:28 PM, Levente Uzonyi <leves(a)elte.hu> wrote: >> >> On Fri, 16 Dec 2011, Henrik Sperre Johansen wrote: >>> >>> On 16.12.2011 03:26, Levente Uzonyi wrote: >>> >>>> >>>> >>>>> How about my numbers? :) >>>>> >>>>> "Preallocate objects, so we won't count gc time." >>>>> n := 1000000. >>>>> objects := Array new: n streamContents: [ :stream | >>>>> n timesRepeat: [ stream nextPut: Object new ] ]. >>>>> >>>>> set := IdentitySet new: n. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "4949" >>>>> >>>>> set := LargeIdentitySet new. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "331" >>>>> >>>>> set := (PluggableSet new: n) >>>>> hashBlock: [ :object | object identityHash * 4096 + object class >>>>> identityHash * 64 ]; "Change this to #basicIdentityHash in Pharo" >>>>> equalBlock: [ :a :b | a == b ]; >>>>> yourself. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "5511" >>>>> >>>>> >>>>> I also have a LargeIdentityDictionary, which is relatively fast, but >>>>> not >>>>> as fast as LargeIdentitySet, because (for some unknown reason) we don't >>>>> have a primitive that could support it. If we had a primitive like >>>>> primitive 132 which would return the index of the element if found or >>>>> 0 if >>>>> not, then we could have a really fast LargeIdentityDictionary. >>>>> >>>>> >>>>> Levente >>>>> >>>>> Hehe yes, if writing a version fully exploiting the limited range, >>>> that's >>>> probably the approach I would go for as well. >>>> (IAssuming it's the version at http://leves.web.elte.hu/** >>>> squeak/LargeIdentitySet.st<htt**p://leves.web.elte.hu/squeak/** >>>> LargeIdentitySet.st<http://leves.web.elte.hu/squeak/LargeIdentitySet.st> >>>> > >>>> ) >>>> >>>> Mariano commented in the version at http://www.squeaksource.com/** >>>> FuelExperiments <http://www.squeaksource.com/**FuelExperiments<http://www.squeaksource.com/FuelExperiments>> >>>> that it's >>>> >>>> slow for them, which I guess is due to not adopting #identityHash calls >>>> to >>>> #basicIdentityHash calls for Pharo: >>>> ((0 to: 4095) collect: [:each | each << 22 \\ 4096 ]) asSet size -> 1 >>>> So it basically uses 1 bucket instead of 4096... Whoops. :) >>>> >>>> Uploaded a new version to the MC repository which is adapted for Pharo, >>>> on the same machine my numbers were taken from, it does the same test >>>> as I >>>> used above in 871 ms. (181 with preallocation). >>>> >>>> >>> Cool. One more thing: in Squeak the method using primitive 132 directly >>> was renamed to #instVarsInclude:, so now #pointsTo: works as expected. If >>> this was also added to Pharo, then the #pointsTo: sends should be changed >>> to #instVarsInclude:, otherwise Array can be reported as included even if >>> it wasn't added. >>> I'll upload my LargeIdentityDictionary implementation to the same place >>> this evening, since it's still 2-3 factor faster than other solutionts >>> and >>> there seem to be demand for it. >>> >>> >>> Levente >>> >>> >>> Cheers, >>>> Henry >>>> >>>> >>>> >>>> >>> >> >> -- >> Mariano >> http://marianopeck.wordpress.**com <http://marianopeck.wordpress.com> >> >> > -- Mariano http://marianopeck.wordpress.com

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[Pharo-project] RTF reader/writer
by StÃ©phane Ducasse April 8, 2015

April 8, 2015

Hi guys Do you know if there is a library somewhere in Smalltalk to deal with RTF writing/saving? Stef

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Re: [Pharo-project] How to encrypt a password?
by Paul DeBruicker Nov. 22, 2013

Nov. 22, 2013

Hi Mariano, I've made a FFI library on Squeaksource that works on Linux. http://www.squeaksource.com/Cryptography/PasswordHashingFFI-PaulDeBruicker.… You need to install the 32 bit versions of libcrypt and libxcrypt if you're using a 64 bit linux os. Using crypt can hash passwords using MD5, DES, SHA256, SHA512. Using libxcrypt can hash passwords using bcrypt. If its for a new installation use bcrypt or SHA512 to hash the passwords. bcrypt is better because its slower, and allegedly future proof. to get a hashed password use BCryptLinuxFFI bcrypt:'mypassword' to check it against a stored hash use: BCryptLinuxFFI check:'mypassword' against: storedHash

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[Pharo-project] TextAttribute, TextAction and TextDoIt or TextURL: not working
by phil＠highoctane.be Nov. 6, 2013

Nov. 6, 2013

I've been investigating with text. I found things that do work like: ((Text withAll: 'foo') , (Text string: '*' attribute: (TextAnchor new anchoredMorph: EllipseMorph new)) , (Text withAll: 'bar')) asMorph openInWorld. ((Text withAll: 'foo') , (Text string: '*' attribute: (TextAnchor new anchoredMorph: ThemeIcons confirmIcon)) , (Text withAll: 'bar')) asMorph openInWorld. But doing: ((Text withAll: 'foo') , (Text string: 'some link' attribute: (TextURL new url:'http://philippeback.eu')) , (Text withAll: 'bar')) asMorph openInWorld. gives me a nice purple 'some link' bit but clicking on it fails with MessageNotUnderstood: TextURL>>actOnClick:for:in:editor: Damn! Ideas on how to tackle this? TIA Philippe Back

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[Pharo-project] Issue 3015: When a test is restarted in the debugger, #tearDown and #setUp and not send
by Hernan Wilkinson Aug. 28, 2013

Aug. 28, 2013

Hi, I added a new issue (that I think it could be see as an improvement, not an issue) that is related to debugging a test case written with SUnit. The problem is that when you restart a test in the debugger (either by pressing the restart button or compiling the method again) the changes made by the test to the objects initialized in the #setUp are not rollbacked. This change sends the messages #tearDown and #setUp to the test when restarting it, therefore letting the test in the same state as when it was run in the first place. I uploaded the solution to this issue (or improvement) to pharo inbox under SLICE-Issue-3015-RestartingATestFromTheDebuggerSendsTearDownAndSetUp-HernanWilkinson.2 I hope you like it! Hernan. -- *HernÃ¡n Wilkinson Agile Software Development, Teaching & Coaching Mobile: +54 - 911 - 4470 - 7207 email: hernan.wilkinson(a)10Pines.com site: http://www.10Pines.com <http://www.10pines.com/>*

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Re: [Pharo-project] Adding a statement programmatically
by Marcus Denker June 7, 2013

June 7, 2013

On Mar 8, 2012, at 12:21 PM, Noury Bouraqadi wrote: > Hi Sean, > > Did you thought about: > -using method wrappers? > -object as methods. An object o put in a method dictionary instead of some method with selector #s. When #s is looked up, o receives the message > run: selector with: args in: originalReceiver > -proxies (look at Ghost) so you introduce an indirection to perform what ever action you want before performing the actual code > -> Compile the code to an RB AST, this then has all the interfaces needed to replace nodes or add nodes. You can then pretty print it back to source. Marcus -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] HMI (was: One more project proposal for GSoC)
by Dennis Schetinin March 30, 2013

March 30, 2013

So, here is the proposal: Name: Khubbatov Rustem Difficulty Level: Intermediate Description A framework for building Human-Machine Interfaces with Pharo back-end providing model, and presentation front-end in Amber. Technical Details A concrete task that should be implemented with this project is a prototype of UI for network management system or SCADA. Server-side (Pharo) will simulate network components and their data, and provide relevant events for client (Amber). The latter will present network items, their state and associated information, and provide UI to control them. An important part of this system is a communication layer between Amber and Pharo. Benefits for the Student The student will gain experience in building client-server applications with advanced UI and providing two-way communication between client and server. Benefits for the Community An ability to create highly interactive web-based applications is a must-have feature for any modern development system. Amber is a bleeding edge in this area in Smalltalk world. A good communication layer between Amber and (for example) Pharo is a very appealing decision for building complex client-server systems. Best regards, Dennis Schetinin Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Monday, 2 April 2012 Ð³. at 21:47, Janko MivÅ¡ek wrote: > Hi Dennis, > > I'd suggest to go ahead. This is first Amber-related project, so it seems even more interesting. But hurry up. Let Rustem prepare the proposal and you post here then we'll open the project page. > > Best regards > Janko > > On Mon, Apr 2, 2012 at 7:41 PM, Dennis Schetinin <chaetal(a)gmail.com (mailto:chaetal@gmail.com)> wrote: > > Rustem Kkubbatov (http://gsoc2012.esug.org/rustem-khubbatov) another student I mentor in Tver State University, decided to try his luck with a project for GSoC. The problem is he can't currently choose a better approach. > > > > The original idea is to build a two-tier Human-Machine Interface (HMI) system (which can be used in a wide range of projects) with Pharo image as back-end (where a model lives) and Amber-based client as a front-end. But this thing seems to be "a little bit" too large for GSoC, isn't it? > > > > An alternative task could be to build a framework for message exchanging between Pharo and Amber. I could be the first mentor for a project based on original idea, or the second/first (depending on if anyone interested) for communication framework. > > > > Any ideas and advices are welcome (ASAP). Thank you in advance. > > > > Best regards, > > Dennis Schetinin > > >

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[Pharo-project] UI blocked
by Janko MivÅ¡ek Jan. 8, 2013

Jan. 8, 2013

Hi guys, My 1.3 #13299 image is blocked again, but just UI not responding to any input events, while Aida web app server is running smoothly in backrgound. >From Transcript I can see that last action was a new image backup procedure, which is done simply by : OSProcess waitForCommand: 'cp some.image some-bck.image'. This procedure is called from a background process and report to Transcript its start and end. Is there something wrong with that? Or is some interference with OSProcess semaphores? (I saw such suspicious thing once before). In any case, is there a way to unblock image now? Ctrl or Alt . doesn't help. Best regards Janko -- Janko MivÅ¡ek Aida/Web Smalltalk Web Application Server http://www.aidaweb.si

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