January 2011 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] Surprising binary messages!

by Igor Stasenko

On 18 January 2011 12:29, Noury Bouraqadi <bouraqadi(a)gmail.com> wrote: > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. > this is first thing all smalltalkers learn: smalltalk syntax does not using math operators precedence rules. because #+ and #/ is just selectors and you can put any behavior to it not nearly related to math. > Noury > > > -- Best regards, Igor Stasenko AKA sig.

Jan. 18, 2011

Re: [Pharo-project] Metacello Help book in Pharo-Dev

by StÃ©phane Ducasse

ha! ok then On Jan 18, 2011, at 11:15 AM, Torsten Bergmann wrote: >> The problem is that we have 25 pages of metacello explanation before that >blog (which will be added to the book chapter). > > Hi Stef, > > I do not mean to add the blog contents! His latest blog post shows > a Pharo help book that is available as monticello documentation: > > See this screenshot: > http://gemstonesoup.files.wordpress.com/2011/01/screenshot.png > http://gemstonesoup.files.wordpress.com/2011/01/screenshot.png > http://gemstonesoup.files.wordpress.com/2011/01/profstef-tutorial.png > > and I ask if it would make sense to add it to Pharo-dev > by default or if one only gets it if he knows about Metacello > and how to load this book. > > Since it includes the API-Doc I think this would mean to > include Metacello too into Pharo-dev... > > Bye > T. > > > > > > -- > GMX DSL Doppel-Flat ab 19,99 Euro/mtl.! Jetzt mit > gratis Handy-Flat! http://portal.gmx.net/de/go/dsl >

Jan. 18, 2011

Re: [Pharo-project] Surprising binary messages!

by StÃ©phane Ducasse

but this is normal. It was always like that. No operator precedence just messages binary are evaluated from right to left 6 + 4 10 / 2 5 > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. > > Noury > >

Jan. 18, 2011

Re: [Pharo-project] Surprising binary messages!

by Pietro Maggi

On Tue, Jan 18, 2011 at 12:29 PM, Noury Bouraqadi <bouraqadi(a)gmail.com> wrote: > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. > > Noury > Hi, I'm just starting to learn smalltalk (thanks to PbE), but I'm pretty sure I know why this happens :-) Smalltalk has no knowledge of mathematics order, just operation order. In this case + and / are both binary operators so the operations are evaluated with the usual order, from left to right: (6 + 4) / 2 The answer 5 is correct. Regards Pietro

Jan. 18, 2011

Re: [Pharo-project] Surprising binary messages!

by Tudor Girba

Why should it be 8? #+ and #/ have the same priority and they will be evaluated from left to right. Cheers, Doru On 18 Jan 2011, at 12:29, Noury Bouraqadi wrote: > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. > > Noury > > -- www.tudorgirba.com "The coherence of a trip is given by the clearness of the goal."

Jan. 18, 2011

Re: [Pharo-project] Surprising binary messages!

by Stanislav Paskalev

There is no such priority in smalltalk. + / - * are just normal binary messages - they take precedence over keyword messages and are second in line after unary ones. And everything is executed left to right so 5 is an expected answer here. Regards, Stanislav Paskalev On Tue, Jan 18, 2011 at 1:29 PM, Noury Bouraqadi <bouraqadi(a)gmail.com> wrote: > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. > > Noury > > >

Jan. 18, 2011

Re: [Pharo-project] Surprising binary messages!

by Marcus Denker

On Jan 18, 2011, at 12:30 PM, Noury Bouraqadi wrote: > 5 is the surprising answer of the expression: > 6 + 4 / 2 > > It should be 8 > But, I got 5 in both 1.1 and 1.2. Why? 6 + 4 is 10 and devided by 2 is 5. (there is no operator precedence) Marcus -- Marcus Denker -- http://www.marcusdenker.de INRIA Lille -- Nord Europe. Team RMoD.

Jan. 18, 2011

[Pharo-project] Surprising binary messages!

by Noury Bouraqadi

5 is the surprising answer of the expression: 6 + 4 / 2 It should be 8 But, I got 5 in both 1.1 and 1.2. Noury

Jan. 18, 2011

Re: [Pharo-project] splitters in table layout

by Gary Chambers

Hi Doru, this appears to be what you want.... | m leftMorph scroll | m := PanelMorph new. m hResizing: #shrinkWrap; vResizing: #spaceFill; changeTableLayout; listDirection: #leftToRight. m addMorphBack: (leftMorph := Morph new color: Color red; minimumExtent: 150@10; extent: 150@10; hResizing: #rigid; "shown for clarity, is the default" vResizing: #spaceFill). m addMorphBack: (EdgeGripMorph new width: ProportionalSplitterMorph splitterWidth; hResizing: #rigid; "not the default this time, vResizing is also #spaceFill by default" target: leftMorph). m addMorphBack: (Morph new color: Color green; minWidth: 100; hResizing: #shrinkWrap; vResizing: #spaceFill). scroll := GeneralScrollPane new changeScrollerTableLayout; scrollTarget: m. scroll openInWindow. Sorry that the edge grip works with minimumExtent (as opposed to minWidth and minHeight). Should clean things up sometime, isn't Morphic fun! Regards, Gary ----- Original Message ----- From: "Tudor Girba" <tudor.girba(a)gmail.com> To: <Pharo-project(a)lists.gforge.inria.fr> Sent: Monday, January 17, 2011 10:34 PM Subject: Re: [Pharo-project] splitters in table layout Hi Gary, I wish to achieve the effect from the panes inside the OSX Finder. Suppose that I have two panes vertically stretched and horizontally stacked in a GeneralScrollbar with a splitter in between. When I drag the splitter, the first panel should extend and push the second one. So, basically, if we have shrinkWrap, I would like the splitter to resize the morph. Cheers, Doru On 17 Jan 2011, at 12:18, Gary Chambers wrote: > Splitters only work with proportional layouts due to the way they work. > Also, since shrink wrap uses the min width/height and splitters have to > work by effectively > changing the position or extent of adjacent morphs (not min), things are > more limited. > > Can you describe the effect you wish to achieve? > > Regards, Gary > > ----- Original Message ----- From: "Tudor Girba" <tudor.girba(a)gmail.com> > To: "Pharo-project(a)lists.gforge.inria.fr Development" > <pharo-project(a)lists.gforge.inria.fr> > Sent: Sunday, January 16, 2011 12:16 PM > Subject: [Pharo-project] splitters in table layout > > > Hi, > > I would like to have splitters used inside a table layout, but I cannot > seem to manage. In particular, I would like to have these splitters work > with the GeneralScrollPane. I tried something like below, but it seems > that the splitters expect a frame layout. > > What can I do about it? > > > | m scroll | > m := PanelMorph new. > m > hResizing: #shrinkWrap; > vResizing: #spaceFill; > changeTableLayout; > listDirection: #leftToRight. > m addMorphBack: (PanelMorph new > minWidth: 100; > hResizing: #shrinkWrap; > vResizing: #spaceFill). > m addMorphBack: (PanelMorph new > minWidth: 100; > hResizing: #shrinkWrap; > vResizing: #spaceFill). > m addPaneSplitters. > > scroll := GeneralScrollPane new > changeScrollerTableLayout; > scrollTarget: m. > scroll openInWindow. > > > > Cheers, > Doru > > > > > -- > www.tudorgirba.com > > "Speaking louder won't make the point worthier." > > > -- www.tudorgirba.com "What we can governs what we wish."

Jan. 18, 2011

[Pharo-project] Nabble ...

by Geert Claes

Just to let everyone know that there seems to be an import problem on our Nabble forums since yesterday afternoon. Nabble support has been contacted and I hope things will be back to normal shortly.

Jan. 18, 2011