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

Re: [Pharo-users] [Seaside] [ANN] SeasideTesting recovered from oblivion
by Johan Brichau Oct. 23, 2017

Oct. 23, 2017

I donât know... we maintained SeasideTesting at http://smalltalkhub.com/#!/~Seaside/SeasideTesting/ until we developed Parasol because it just covers some bare-bones html page testing. Forget about JavaScript and css influence on your tests in seaside testing. I think we prefer a slower but accurate testing proces, using Parasol. Johan > On 23 Oct 2017, at 22:22, Jon Paynter <kittle31(a)gmail.com> wrote: > > Great to hear! > > I use this on some older projects, and found the documentation helpful, but also sketchy. Hopefully you can update things. > > Will your resurected version work with Visualworks? > >> On Mon, Oct 23, 2017 at 3:04 AM, Esteban Lorenzano <estebanlm(a)gmail.com> wrote: >> Hi, >> >> I spend some days last week woking with the guys of AFI (http://afi-sa.fr, yes they also use Pharo in some of their projects) and together we recovered SeasideTesting from Davis Shaffer to be used for their TDD experience. >> >> you can check it out here: https://github.com/Afibre/SeasideTesting >> >> Whatâs SeasideTesting? A package to test Seaside components. >> Why we do not use Parasol? Because it is based on selenium and that makes the process slow. >> Where can I know more? >> - there is some documentation here (for VW, I think): http://www.shaffer-consulting.com/david/Seaside/TestingComponents/TestingCo… >> - some slides here (on squeak): http://esug.org/data/ESUG2005/Wednesday/2005-ESUG-Shaffer.pdf >> but all that is old. Best way is to just install and see the tests, as always, >> >> >> cheers! >> Esteban >> >> _______________________________________________ >> seaside mailing list >> seaside(a)lists.squeakfoundation.org >> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside >> > > _______________________________________________ > seaside mailing list > seaside(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

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Dynamically changing code in a safe way
by abdelghani ALIDRA Oct. 23, 2017

Oct. 23, 2017

Hi, If I create a class HotSwapping with the instance variable currentBLoc (and the corresponding accessors) and the following methods : HotSwapping>>initialize currentBloc := [ 1 to:50 do: [:index |Transcript show: index. 100 milliSeconds asDelay wait]. Transcript cr. 1000 milliSeconds asDelay wait ] HotSwapping>>run [10 timesRepeat: [ currentBloc value ]] fork I then do : obj := HotSwapping new run The âfunnyâ thing is that, when Transcript starts showing numbers, lets say : 12345678910 (i.e. the bloc is in the middle of its execution), I do obj currentBloc: [Transcript show: âHelloâ;cr. 1000 milliSeconds asDelay wait ] The Transcript does not stop showing numbers. It shows the Hello message only after the old bloc has finished executing (the entire line of number form 0 to 50 has been printed in the Transcript) So why does not this happen this way? Why the assignment of the new code is delayed until the end of the bloc execution? is it something related to threads execution or does Pharo implement some safety hot swapping mechanisms? Thanks in advance. Abdelghani

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About Ztimestamp
by Stephane Ducasse Oct. 23, 2017

Oct. 23, 2017

Hi sven I'm confused ft := ZTimestampFormat fromString: '02/11/2017'. ft format: DateAndTime now produces 10/11/1017060986 While I do not want time but just the date. and the date is wrong. So I will do it manually but I found sad that ZTimestampFormat cannot handle just handling days. I could then pass also a date and it would not ask for nanoseconds. Stef

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String >> #asSet
by Prof. Andrew P. Black Oct. 23, 2017

Oct. 23, 2017

If you have a String (or a Symbol), and you sent it the message #asSet, what do you expect to get as an answer? A set of characters, one would think. But do you care what class is used to implement that set of characters? -- One argument says that it should be a Set, because thatâs what asSet answers when it is sent to other collections. Itâs conceivable that you might initially populate the set with Characters, but then add other kinds of object. -- Another argument says that it should be a CharacterSet (or a WideCharacterSet), because you know that the receiver contains characters. The expression 'abcd' asSet is a convenient way to create a CharacterSet with: $a with: $b with: $c with: $d -- A third argument says that you shouldnât care. If you really want a specific class, then you should use (aString as: Set) rather than aString asSet. Right now, in Pharo 7, there is a test in TConvertAsSetForMultiplinessTest that insists that the class of the result of asSet is actually Set. This test is already overridden once, in IdentityBagTest, because the result of sending asSet to an IdentityBag is not a Set â itâs an IdentitySet. So, indeed, there is already a precedent for asSet returning a set object that is not an instance of Set. I think that the test is bad, and should be changed. But this raises the larger question: if you want to know whether or not a collection has set-like behaviour, what is the right way of finding out? (aCollection isKindOf: Set) reads OK, but is actually wrong, because itâs testing the implementation, and not the behaviour. A predicate on all collections (isSet would be the obvious name) would seem to be indicated. And thatâs what the test should be using. (You might ask why CharacterSet and WideCharacterSet are not subclasses of Set. This answer is that subclassing Set implies inheriting a hash table, and the raison dâÃªtre for CharacterSet is that it does not use a hash table.)

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Pharo/Win on a HiDPI display
by Raffaello Giulietti Oct. 23, 2017

Oct. 23, 2017

Hi, not sure if this has already been discussed. I'm using Pharo/Win on a HiDPI (aka "retina") display scaled at 200%. Everything shows correctly scaled (widgets, fonts, icons, etc.), except for the cursor, which is not scaled at all in Pharo, so it is rendered half the expected size. Outside Pharo the cursor appears correctly. Is there something configurable in Pharo itself to overcome the tininess of the cursor with respect to the rest of the GUI elements? (BTW, kudos for the otherwise excellent HiDPI support in Pharo. Nice work.) Greetings Raffaello

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Re: [Pharo-users] Smalltalk Argument
by horrido Oct. 23, 2017

Oct. 23, 2017

Of all the responses here, I like this one the best because it's right on the money. In my long career, I've been dropped into many software projects where I had to quickly ramp up with a new programming language. The employer didn't hire me for my language expertise; they hired me for my programming skill and ability to deliver good quality software on time. The programming tool used was a mere technicality, and hardly an obstacle. There is not a software developer alive who can coast through their entire career without ever needing to pick up another programming language. This is simply not an issue except for the most myopic of employers. Pharo Smalltalk Users mailing list wrote > Hi Paulo, > > I think this is not the right question to ask. > The problem is not "Where to find Smalltalk developers?", the problem is > rather > "How much effort does it take to help a good experienced OO developer to > transition to Smalltalk?" > > OO developers have to steadily gain and learn new technologies and > frameworks... > So why not Smalltalk? > Those developers that are not willing to learn a new language just > because they consider the trade-offs of not finding a job in that field > that easily, might not be the best choice for your team anyway... > > That is my experience... I know more developers missing the "Smalltalk > experience" than those hating Smalltalk once they left a team... > > Sebastian > > > On 2017-10-19 12:04 AM, Paulo R. Dellani wrote: >> Dear all, >> >> after using Smalltalk for several years I developed a passion for the >> language (how not to?), and Pharo is just so great to develop with. >> So thank you guys for keeping this wonderful project running. >> >> Unfortunately, it is not easy to always point out why Smalltalk >> should be employed as "main development language" in a team >> or for a project. In the last discussion of this sort I was confronted >> with the question "where are we going to get new smalltalk >> developers if our startup grows or if you go?". Well, I had no >> good answer to that. What would have you answered? >> >> Cheers, >> >> Paulo >> >> >> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Restoring an Alto
by Ben Coman Oct. 23, 2017

Oct. 23, 2017

An interesting side story... A Digibarn Xerox Alto arrives for restoration https://www.youtube.com/watch?v=JSPlr4AZsKQ cheers -ben

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[Pharo 70] Integration log
by Stephane Ducasse Oct. 22, 2017

Oct. 22, 2017

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[Pharo 70] Integration log
by Stephane Ducasse Oct. 22, 2017

Oct. 22, 2017

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Bloc texts font size
by Steven Costiou Oct. 20, 2017

Oct. 20, 2017

Hi, i am trying to set the font size of a BlTextElement, and i do not have much success. I use the following code to add the text element, where 'model' is a string. First, if the string is '0.0' then the font size is correct (see screenshot). But, if for example the value is '21.0' then the font size is wrong (see the other screenshot). I don't understand, i've tried variants but it seems to me that this code was the right way to do it. Sometimes, a '9' would be displayed at the correct font size, sometimes not. Any ideas ? text := BlTextElement new text: ((BrRopedText string: model) attributes: {(BrTextForegroundAttribute paint: (Color green alpha: 0.8)). (BrFontSizeAttribute size: 60). (BrFontWeightAttribute weight: 50). (BrFontGenericFamilyAttribute monospace). "(BrFontFamilyAttribute named: 'Source Sans Pro')"}); yourself. text constraintsDo: [ :c | c frame horizontal alignCenter. c frame vertical alignCenter ]. "text is added to a parent BlElement" self addChild: text Second, i don't have the impression that changing the font family does have any effect (but maybe its my local setup i don't know...). Steven.

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