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

[Pharo-project] Fwd: trying to understand loops in pharo
by StÃ©phane Ducasse Oct. 17, 2011

Oct. 17, 2011

A friend of mine ask me the following > |result| > result := String new. > 1 to: 10 do: [:n | result := result, n printString, ' ']. > > I am trying to do or print this code. It prints 'nil' instead of a collection. Its an example from PBE book. > do you know the reason? > > although this one's working: > > result := String new. > (1 to: 10) do: [:n | result := result, n printString, ' ']. I checked the implementation Interval>>do: aBlock "Evaluate aBlock for each value of the interval. Implementation note: instead of repeatedly incrementing the value aValue := aValue + step. until stop is reached, We prefer to recompute value from start aValue := start + (index * step). This is better for floating points accuracy, while not degrading Integer and Fraction speed too much. Moreover, this is consistent with methods #at: and #size" | aValue index size | index := 0. size := self size. [index < size] whileTrue: [aValue := start + (index * step). index := index + 1. aBlock value: aValue] Number>>to: stop do: aBlock "Normally compiled in-line, and therefore not overridable. Evaluate aBlock for each element of the interval (self to: stop by: 1)." | nextValue | nextValue := self. [nextValue <= stop] whileTrue: [aBlock value: nextValue. nextValue := nextValue + 1] any further idea than := value is different from value: Stef

6 12

[Pharo-project] What is the status of the new profilers?
by Mariano Martinez Peck Oct. 17, 2011

Oct. 17, 2011

Hi (Alexandre?). What is the status of the new profilers? is there something I can use in the released Pharo 1.3 image? thanks -- Mariano http://marianopeck.wordpress.com

1 0

[Pharo-project] Linus Torvaldsâs Lessons on Software Development Management
by Ben Coman Oct. 17, 2011

Oct. 17, 2011

While I am waiting for enough time to devote to learning more Smalltalk/Squeak/Pharo, I came across this article [1] which reflected upon recent discussion on Fuel version format compatibility, as well as on other projects. Perhaps it is that it is such a great environment for experimenting with ideas that it encourages developers to do so, but it seems that functionality often becomes orphaned as the trunk progresses. I see some efforts provide a more professional platform, and understand that involves 'some' ripping/replacement of unmaintainable code, but which contradicts the philosophy of 'no regressions' mentioned in the article - which in practice I imagine a hard line to walk. Linux is the poster child of open source development success, and while it is more mature that Pharo such that the presented philosophy might not fit exactly, perhaps something can be learned. I hope you find parts of it interesting. cheers, Ben [1] http://h30565.www3.hp.com/t5/Feature-Articles/Linus-Torvalds-s-Lessons-on-S…

3 2

[Pharo-project] How to use freetype?
by Igor Stasenko Oct. 17, 2011

Oct. 17, 2011

I feel a bit confused. I want to do something as easy as: font := Something fontByName: 'Arial'. but the problem is that i cannot find anything like that in freetype. There is FreeTypeFontProvider fontFor: aLogicalFont familyName: familyName but i puzzled, why it needs a logical font and why i should create it? Is there a general way to programmatically say: give me font 'Arial' pt size 9, or nil, if font cannot be found? -- Best regards, Igor Stasenko.

3 3

Re: [Pharo-project] Can this be improved in Glamourous?
by Marcus Denker Oct. 17, 2011

Oct. 17, 2011

On Oct 17, 2011, at 9:37 AM, StÃ©phane Ducasse wrote: > can you check > > https://pharo-ic.lille.inria.fr/hudson/job/Pharo%201.3/ > Because it should contain the latest shout and rb for 1.3 Looks good... (after a quick look). The only problem is that it has one undeclared so we have one failing test. https://pharo-ic.lille.inria.fr/hudson/job/Pharo%201.3/lastCompletedBuild/t… Marcus -- Marcus Denker -- http://marcusdenker.de

1 0

[Pharo-project] IS Smalltalk Source also an object?
by Guido Stepken Oct. 17, 2011

Oct. 17, 2011

Hi, there! I had a nice conversation about Smalltalk among software architects: I claim smalltalk to be the only programming system, where source is an object too, with all advantages and disadvantages! Am i right? What consequences follow out of that? regards, Guido Stepken

1 0

Re: [Pharo-project] Can this be improved in Glamourous?
by Marcus Denker Oct. 17, 2011

Oct. 17, 2011

On Oct 16, 2011, at 10:07 PM, Tudor Girba wrote: > Hi, > > If you give me the script, I build one based on the Core. > Husdon does: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfPharo'; load. -- Marcus Denker -- http://marcusdenker.de

4 9

Oct. 17, 2011

Hi everybody Alain did a good job to describe four nice example of how to use Shout. Finally we get some examples we can learn from. The examples are in Shout-Examples category. Stef

1 0

Re: [Pharo-project] Can this be improved in Glamourous?
by Marcus Denker Oct. 17, 2011

Oct. 17, 2011

On Oct 16, 2011, at 11:14 PM, StÃ©phane Ducasse wrote: >> We need to fix the Metacello of Shout to load the latest version so we can build a Full image based >> on 13315, this should solve some of the problems. > > I published a new configurationOfShout load for 1.3 the latest version published by alain. > Now I'm sick so I will sleep. > I have started a build of 1.3 Full: https://pharo-ic.lille.inria.fr/hudson/job/Pharo%201.3/ -- Marcus Denker -- http://marcusdenker.de

2 1

Re: [Pharo-project] Can this be improved in Glamourous?
by Marcus Denker Oct. 16, 2011

Oct. 16, 2011

On Oct 15, 2011, at 11:13 PM, StÃ©phane Ducasse wrote: > > On Oct 15, 2011, at 10:58 PM, Tudor Girba wrote: > >> Hi, >> >> On 15 Oct 2011, at 22:36, Mariano Martinez Peck wrote: >> >>> Hi Tudor. Today I wanted to give it a try to 'GT-Inspector' 'GT-Playground' hence I did: >> >> I am happy you decided to give them a try :). But, the Playground is not yet ready :). >> >>> (ConfigurationOfGlamoroust project version: #bleedingEdge) load: #('GT-Inspector' 'GT-Playground' ). >>> >>> In a Pharo 1.3 release. To my surprise, it took like half an hour to install, and it even was broken because it installed a different version of refactoring browser that is not working in 1.3. >> >> This is due to a broken ConfiguraitonOfRB. I would actually be very interested in a fix in this area. > > what is broken? because I spent one full sprint to fix it. the fixed version needs a new Core (13315), while the Full image right now is 13307. The RB between the two is not compatible. We need to fix the Metacello of Shout to load the latest version so we can build a Full image based on 13315, this should solve some of the problems. Marcus -- Marcus Denker -- http://marcusdenker.de

3 3