February 2014 - Pharo-users

Re: [Pharo-users] Could Pharo be more idiot-proof?
by Daniel Lyons Feb. 4, 2014

Feb. 4, 2014

PBK Research writes: > As a supplementary point, I am trying to use PetitParser to parse natural > language. From the examples it is clear that PP is designed with formal > languages in mind. Am I wasting my time using it on natural languages? Has > anyone else tried this? What are you trying to do with natural language? Do you have highly regular input and a somewhat restricted domain? I have used Prolog DCGs to mess around with this kind of thing, and if you have a lot of control over the input and your expectations you can make progress with a tool for formal languages, but if you want to do something sophisticated or support arbitrary inputs, you're probably wasting your time. -- Daniel Lyons

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[ANN] Public Pharo Sprint in Lille
by Marcus Denker Feb. 4, 2014

Feb. 4, 2014

Hi, We are often doing Sprints the friday afternoon here in the team. For the following dates we plan to have larger sprints (e.g. with food organised): Friday, Feb 14 Friday, March 7 Friday, April 11 Friday, May 23 Where? Inria Lille, Building B If you happen to be close some other Friday, feel free to join the smaller sprint, too. And people can organise sprints everywhere, so feel free to organise one yourself at your location. The idea of the sprint is to do either boring or complex things that nobody found the energy to do alone. On the last Sprint before Christmas we killed 30 bugs, for example. Marcus

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Roassal Sunburst examples not working
by Arturo Zambrano Feb. 3, 2014

Feb. 3, 2014

Hi, I just installed Roassal in a 2.0 Pharo image All the examples of Sunburst raise a MNU but in a red background window (screenshot attached). It seems that something prevents the debugger to open. Any hint about this? Maybe there is a missing dependency of Roassal sunburst thanks art

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Nautilus error
by Bob Williams Feb. 3, 2014

Feb. 3, 2014

I am trying to understand Morphs by looking at how the Workspace and Browsers are created; however, I get a Nautilus error when I "DoIt" on the following HierarchyBrowser newFor: Boolean. That code is in the comments section for that class. Does the HierarchyBrowser no longer work or am I doing something wrong?

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Re: [Pharo-users] Could Pharo be more idiot-proof?
by Sean P. DeNigris Feb. 3, 2014

Feb. 3, 2014

Peter Kenny wrote > It looks as though > I have lost the contents... Open another workspace, click the triangle on the right side of the title bar, then select "Previous contentsâ¦" from the menu and choose the one you closed accidentally ----- Cheers, Sean -- View this message in context: http://forum.world.st/Could-Pharo-be-more-idiot-proof-tp4741153p4741227.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] Could Pharo be more idiot-proof?
by Pharo4Stef Feb. 3, 2014

Feb. 3, 2014

> I have just done something stupid, so this is just letting off steam (and maybe looking for someone else to blame!). Donât worry. :) > I have been playing with Moose (version 4.8), mainly because I want to experiment with PetitParser. I am struggling a bit, but getting somewhere I think. I have been trying out a lot of snippets in a workspace, before getting down to producing proper code. In a fit of madness, thinking I was closing a debugger window, I closed the workspace window. It looks as though I have lost the contents, though I can probably reconstruct them from the changes file. My main Smalltalk experience is with Dolphin Smalltalk, and there, if you try to close a workspace, it asks if you want to save the contents first. Could Pharo have something similar? Normally it should. Now what I suggest is - use a class side methods like that you can version your scripts for free. > - or am I the only idiot to do this? > > As a supplementary point, I am trying to use PetitParser to parse natural language. From the examples it is clear that PP is designed with formal languages in mind. Am I wasting my time using it on natural languages? Has anyone else tried this? > > Thanks for any advice > > Peter Kenny

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Re: [Pharo-users] Could Pharo be more idiot-proof?
by Benjamin Feb. 3, 2014

Feb. 3, 2014

Open a new workspace. In the title bar there is a small black triangle (Window menu). Close to the end, you should find âPrevious contents' With a bit of luck, it should be there Ben On 03 Feb 2014, at 11:35, PBK Research <peter(a)pbkresearch.co.uk> wrote: > I have just done something stupid, so this is just letting off steam (and maybe looking for someone else to blame!). > > I have been playing with Moose (version 4.8), mainly because I want to experiment with PetitParser. I am struggling a bit, but getting somewhere I think. I have been trying out a lot of snippets in a workspace, before getting down to producing proper code. In a fit of madness, thinking I was closing a debugger window, I closed the workspace window. It looks as though I have lost the contents, though I can probably reconstruct them from the changes file. My main Smalltalk experience is with Dolphin Smalltalk, and there, if you try to close a workspace, it asks if you want to save the contents first. Could Pharo have something similar? - or am I the only idiot to do this? > > As a supplementary point, I am trying to use PetitParser to parse natural language. From the examples it is clear that PP is designed with formal languages in mind. Am I wasting my time using it on natural languages? Has anyone else tried this? > > Thanks for any advice > > Peter Kenny

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Could Pharo be more idiot-proof?
by PBK Research Feb. 3, 2014

Feb. 3, 2014

I have just done something stupid, so this is just letting off steam (and maybe looking for someone else to blame!). I have been playing with Moose (version 4.8), mainly because I want to experiment with PetitParser. I am struggling a bit, but getting somewhere I think. I have been trying out a lot of snippets in a workspace, before getting down to producing proper code. In a fit of madness, thinking I was closing a debugger window, I closed the workspace window. It looks as though I have lost the contents, though I can probably reconstruct them from the changes file. My main Smalltalk experience is with Dolphin Smalltalk, and there, if you try to close a workspace, it asks if you want to save the contents first. Could Pharo have something similar? - or am I the only idiot to do this? As a supplementary point, I am trying to use PetitParser to parse natural language. From the examples it is clear that PP is designed with formal languages in mind. Am I wasting my time using it on natural languages? Has anyone else tried this? Thanks for any advice Peter Kenny

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Re: [Pharo-users] Hyperion (vector graphics editor and GUI designer using Athens)
by Bob Williams Feb. 3, 2014

Feb. 3, 2014

Kilon I can probably help you as it was in a Smalltalk application that I developed in the early 1990s, ObjectiveFM, for my doctoral dissertation and later was a commercial product. The method is below and it is for a cubic Bezier spline. I am considering add a GIS package to Pharo and would like to have assistance. I would also note that you should look at the series of books called Graphics Gems (5 books) that are a great resource. Bob Williams correlatesTo: testPoint within: correlationDistance | dz index point return singleSpline aPoint testReturn | "self halt." aPoint := testPoint. return := nil. dz := self controlPoints first - aPoint. ((dz dotProduct: dz) < self minimumDistance) ifTrue: [ ^ self controlPoints first ]. dz := self controlPoints last - aPoint. ((dz dotProduct: dz) < self minimumDistance) ifTrue: [ ^ self controlPoints last]. index := -2. ((controlPoints size) // 3) timesRepeat: [ index := index + 3. "eliminate segments from consideration if the bounding box about them does not contain aPoint" singleSpline := OFMSingleBezierSpline createFrom: (Array with: (controlPoints at: index) with: (controlPoints at: index +1) with: (controlPoints at: index +2) with: (controlPoints at: index +3) point := singleSpline nearestPointOnCurveFor: aPoint. (point notNil) ifTrue: [ ((point distanceFrom: aPoint) <= correlationDistance) ifTrue: [ testReturn := true ] ifFalse: [ testReturn := false ] ] ifFalse: [ point := ((singleSpline z1 distanceFrom: aPoint) < (singleSpline z2 distanceFrom: aPoint)) ifTrue: [ singleSpline z1 ] ifFalse: [singleSpline z2 ]. ((point distanceFrom: aPoint) < correlationDistance) ifTrue: [ testReturn := true ] ifFalse: [ testReturn := false ] ]. (testReturn) ifTrue: [ (return isNil) ifTrue: [ return := point ] ifFalse: [ ((point distanceFrom: aPoint) < (return distanceFrom: aPoint)) ifTrue: [return := point] ]]]. ^return

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creating a png filereference in memory
by Tudor Girba Feb. 3, 2014

Feb. 3, 2014

Hi, I have troubles creating a PNG file in memory. I can create a PNG file on disk and load it back without problems: f := FileSystem disk workingDirectory / 'pharoicon.png'. f writeStreamDo: [ :stream | PNGReadWriter putForm: ThemeIcons current pharoIcon onStream: stream ]. f readStreamDo: [ :stream | PNGReadWriter formFromStream: stream binary ] But, when I try the same thing in memory, I get an exception for incorrect format: f := FileSystem memory workingDirectory / 'pharoicon.png'. f writeStreamDo: [ :stream | PNGReadWriter putForm: ThemeIcons current pharoIcon onStream: stream ]. f readStreamDo: [ :stream | PNGReadWriter formFromStream: stream binary ] Can anyone point me to what am I doing wrong? Doru -- www.tudorgirba.com "Every thing has its own flow"

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