July 2012 - Pharo-users - lists.pharo.org

funny idea Symbol vs. Selector
by stephane ducasse May 14, 2015

May 14, 2015

Hi guys I'm thinking aloud... I was wondering if we could not take advantage of a new class: Selector. MethodDict would only contain selectors and not symbols. I remember that I talked about that with hernan. Stef

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Postmark email library
by Francois Stephany Aug. 31, 2013

Aug. 31, 2013

Hi guys, I've made a simple wrapper around the Postmark API. It lets you send emails without dealing with a SMTP server. You can read about it here: http://developer.postmarkapp.com/developer-libs.html http://developer.postmarkapp.com/developer-build.html and there: http://articles.tulipemoutarde.be/send-email-from-pharo-with-postmark It's pretty simple and naive implementation but it gets the job done. I'll add email attachements when I will need it. Francois

4 20

Package browser?
by Rob Vens June 28, 2013

June 28, 2013

I am attempting to do the Pharo by Example book, but a package browser (which is used in the examples) is not in the 1.1.1 or 1.2 image. Should I still use categories? If I create a package in Monticello browser I am not able to add classes or anything (not as far as I could see). Just starting out using Pharo, so apologies if these questions are already answered elsewhere.

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FFI basics..
by S Krish Sept. 28, 2012

Sept. 28, 2012

* How does FFI work for passing a char* argument that gets modified in the invoked module char* ctest ( char* test , char** test2) { test = "Modify this argument"; // loop and fill in data into test2 and return.. return "something else"; } ctest: test <cdecl: char* 'ctest' ( char* , long ) module: 'libctest'> So invoking this with say ExternalAddress allocate: **, gives us the values as modified by the module.. and be converted as required into ByteArray for the second

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Zinc crashes an image.
by Paul DeBruicker Sept. 25, 2012

Sept. 25, 2012

Hi - I'm pretty sure I'm having the same problem Phillipe had/described in this message: http://forum.world.st/Zinc-crashing-image-at-start-up-td3785797.html At least the PharoDebug.log is the same. It happens on both the most recent Cog and interpreter VM. Is there a way to recover from this? I could follow Sean's instructions from this thread if necessary: http://forum.world.st/Fwd-Oops-I-put-a-halt-in-a-startup-method-td3800729.h… Or is there a way to extract changes from a changes file for one image into another image? I'd rather fix the broken image but if its not possible I'd then just try to load those changes I don't have. Thanks for any guidance you can provide. Paul

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GemSource, seaside.gemstone.com, SS3 MAINTENANCE Saturday June 9 from 10am-2pm PDT
by Dale Henrichs Sept. 11, 2012

Sept. 11, 2012

Maintenance is scheduled for this Saturday and according to the internal announcement no downtime is anticipated: The work is considered low risk and no downtime is anticipated, this is being sent out as a courtesy. If you experience problems on Saturday, don't hesitate to send email. Dale

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Debugging block with ensure block
by kurs.jan Aug. 7, 2012

Aug. 7, 2012

Hi, I observe a strange behaviour (in Pharo-1.4-14557-one-click.app) while debugging the following code. [ | a | self halt. a := (1 == 1). a ifTrue: [ ^ 'A'] . Transcript crShow: 'foo'. ^ 'B' ] ensure: [ Transcript crShow: 'bar'. ] If I comment out the halt statement and if I inspect the result of the attached code, the 'A' is returned and there is a 'bar' text in the transcript. If I inspect the result of the attached code (with halt enabled) and if I click step over in a debugger, I can see, that the statement ^ 'A' does NOT return, the program flow continues on the next line and the 'foo' is shown in the transcript. Now, I can click proceed and the 'B' is returned as a result. I tried the same process in Pharo-1.3-13328-OneClick.app and I got 'A' result in both cases. I tried on this system: System Version: Mac OS X 10.7.3 (11D2001) Kernel Version: Darwin 11.3.0 Regards, Jan -- View this message in context: http://forum.world.st/Debugging-block-with-ensure-block-tp4641279.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Search/replace
by Dezider Mesko Aug. 4, 2012

Aug. 4, 2012

Hi, how I can do search/replace through multiple packages/classes/messages? Thank you! d.

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Zinc downloadTo: help required
by Chris Aug. 3, 2012

Aug. 3, 2012

I'm trying to do a wget style download with Zinc but running into a few problems when a server uses chunked transfer encoding. Eventually it ends up in ZnUtils streamFrom:to:size: with an empty totalSize (as content-length is unset) and then produces an empty file. However the download works fine if I simply do an upToEnd on the ZnChunkedReadStream. This can be seen by executing ZnClient new url: 'http://www.google.com'; downloadTo: '/tmp/foo.txt'. Thanks Chris

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Re: [Pharo-users] iterating through an ascii file line by line
by Paul DeBruicker Aug. 3, 2012

Aug. 3, 2012

Sorry forgot to mention I'm using Pharo 1.3 on linux.

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iterating through an ascii file by line
by Paul DeBruicker Aug. 3, 2012

Aug. 3, 2012

Hi - Is there an easy/standard way to open an ascii file and iterate through it line by line? I want to put several files contents into their own OrderedCollections and then do awful things to them. The files are ~500MB each Thanks Paul

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How do you guys navigate while editing code?
by Patrik Sundberg Aug. 1, 2012

Aug. 1, 2012

Hi, Jumping in as a smalltalk beginner I am, as one would expect, feeling frustrated by not knowing my way around. Can see lots of cool stuff but all the mouse action is killing me. I'm a vim(+tmux) guy by background so the contrast is vast, I usually never need to touch my mouse when programming. I was trying to find some keyboard shortcuts to do things like "jump to method within class with fuzzy search logic" (type a few characters and get list etc) or "jump to the method/class under which the cursor is located". The jump to selected needs text selection which seems really awkward (even when selecting with keyboard), my 90% case is to jump to what's under the cursor. The global find class and find methods are good, but most of the time I'm interested in "local" navigation in the current class while jumping back and forth between methods in same class. I find more things in Nautilus since I can list the shortcuts there, but quite a few doesn't seem to work and I'm not having much luck using nautilus in 1.4 (and 2.0 too edgy for me right now, need metacello to load things cleanly etc at least). In OB in 1.4 I'm not able to figure out how to get a list of shortcuts apart from what's annotated in menus Guess my question is - how does a keyboard centric person like me learn keyboard shortcuts and get productive in the image, more specifically 1.4 and OB? How can I work out what keyboard shortcuts exist? Thanks!

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Adding Websocket support to Zinc
by Andy Burnett July 31, 2012

July 31, 2012

I think we need Websocket support built into Pharo. So, rather than talk about it, I have contracted with Sven to build it into Zinc. We hope to have a running version in the early Autumn. The purpose of this email is: 1. To let everyone know that we will have Websocket support soon 2. To ask if anyone else feels that they would gain commercial benefit from using this feature, and if so, whether they would like to help cover the cost. If so, please drop me an email. Cheers Andy

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[pharo 2.0] IP address to ByteArray
by Bernardo Ezequiel Contreras July 31, 2012

July 31, 2012

Hi all, Is there a better way to convert an IP address to a ByteArray? I'm doing this ('127.0.23.11' subStrings: '.') collect: [:each | each asInteger ] as: ByteArray thanks -- Bernardo E.C.

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Re: [Pharo-users] [Pharo-project] fuelized test failures
by Mariano Martinez Peck July 25, 2012

July 25, 2012

And here I wrote what we are doing so that others know :) http://marianopeck.wordpress.com/2012/07/25/reviving-ci-test-failures-in-lo… Thanks Cami and Sean. You rock. Cheers, On Wed, Jul 25, 2012 at 6:45 AM, Camillo Bruni <camillobruni(a)gmail.com>wrote: > > On 2012-07-25, at 00:50, Sean P. DeNigris wrote: > > > > > Mariano Martinez Peck wrote > >> > >> but if that allows me to have the .fuel > >> files for each version, then please go ahead :) > >> > > > > The zip artifact now includes all the fuel files. I didn't add the fuel > > files as separate artifacts because it seems there's no way to specify a > > target folder for artifacts without a plugin. > > perfect guys! > > -- Mariano http://marianopeck.wordpress.com

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Dynamic graph exploration - seeking input on idiomatic smalltalk [LONG]
by Patrik Sundberg July 24, 2012

July 24, 2012

Hi, First of all, sorry for the long email as my first email to the list. Hopefully some people will find it an interesting discussion :) I'm a long time programmer that has been studying smalltalk and pharo over the last year. It's a beautiful language I'm liking the image style of development a whole lot. I've been looking for a good test case to try out in pharo and I've got something in mind. I've used ruby since around 2000 and given how much it has been inspired by smalltalk it's not a big leap. My real job is being a commodities trader but I build my own tools and something I'm always working on is improved risk and pricing tools. Lots of that comes down to 2 things: 1. evaluating a "function" (in a general sense) with inputs that are picked depending on time. e.g. I want to price a security and I want to pick up prices for time X as inputs to the pricing model. 2. calculating a derivative of the "function" above with respect to inputs What I tend to do in order to keep things consistent by design, plus add natural caching, is create a calculation graph. I define all the dependencies and create an in-memory graph where each node is unique using an identity map. I then perform a calculation where the calculations trickle down the graph starting from the node I'm interested in down all it's dependencies. To calculate the derivative I then find the node representing the input I want the derivative with respect to and use finite differences, e.g. move it's value, and recalculate the top level node. On the second valuation of the graph only the parts that are affected by me changing that 1 value will need to be evaluated, the rest is cached an unaffected. It makes it very easy to ask questions like "How much will I be affected by X changing by Y?" since I can take the top level node of the graph, search for X, and if found change it by Y and recalculate. How the graph is constructed in memory depends on time (and a few other things). I always store all previous states of the world so that I can recreate any calculation I did in the past. Very useful for diagnosing problem. Hence if I for example change what model I use to model something, that change is recorded in a way such that if I set my "time" to before the change happened the graph will get created as it would have with the old model, and for a time after the change it'll create a different graph reflecting the new model. Hence the graph can only be known at runtime when the "time" etc is known. I currently have a ruby mockup of this. It's a DSL that looks like this: ----------- EXAMPLE class ExampleObject include GraphEntity # includes a module with functionality for objects participating in the graph, including #property and #calc used below property :foo do 123 # this is the default value for this property which will be used before a value has been set and saved end calc :bar do |arg| foo.value + arg # take the value of the arg property and add the argument given to the calculation node end end o = ExampleObject.new # this will kick of the graph being built in memory and setup the dependency between bar and foo nodes o.bar(1).value # -> 124 # this will be a "cache lookup" since nothing in the graph that bar depends on has changed (i.e. the "expensive" calculation is not performed again o.bar(1).value # -> 124 o.foo.set_value(2) o.bar(1).value # -> 125, realizes that foo changed and performs a recalc -------------------------------------------------------- To accomplish this I use dynamic code generation like the below for #property and similar for other types of nodes: # NOTE: it's a class level method, hence how I can call it when defining the class in the example def property(name, time = CdrEnv.instance.time, &block) clear_property(name) getter_method_body = <<-EOF def #{name} init_block = self.class.property_init_block_for(:#{name}) time_for_property = self.class.property_time_dependency_for(:#{name}) if init_block.nil? CdrEnv.instance.get_property_node(self, :#{name}, time_for_property) else CdrEnv.instance.get_property_node(self, :#{name}, time_for_property, &init_block) end end EOF setter_method_body = <<-EOF def #{name.to_s}=(value) #{name.to_s}.mutate(value) end EOF class_eval getter_method_body class_eval setter_method_body register_property_node(name, time, &block) end Don't worry about the details or all the unfamiliar ruby, the main point is that it creates an instance method that uses the singleton CdrEnv.instance to either get or create the node representing the property from the graph identity cache depending on if it exists or not. >From a tooling point of view I think I'd love to work with this kind of thing in pharo. Building my own browsers for inspecting and debugging my dynamic graph should be very good fit. However, I'd appreciate some pointers to idiomatic smalltalk to attack this kind of problem in terms of implementing the graph itself - I obviously want the user (even if it's me) to just have to focus on the domain model and hide as much as possible of the graph bits under the covers the same way I've done with the code generation stuff in my ruby example. Any input into this would be much appreciated, Patrik P.S. Btw, the persistence backend for this is the neo4j graph database, but it's fronted by a service slotting into my own service framework built using ZeroMQ and services exchanging messages in protobuf format. One can use it from any language as long as one can send protobuf messages over zeromq. I see there's a zeromq ffi library available on SS that I'll check out, but I'm not finding a protobuf implementation. It'd be easy enough for me to port a ruby protobuf implementation but I may as well ask if someone has already done any work on protobuf for smalltalk? -- View this message in context: http://forum.world.st/Dynamic-graph-exploration-seeking-input-on-idiomatic-… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Recovery log thoughts
by Chris July 23, 2012

July 23, 2012

One area I see some beginners struggle with image development is with regards to losing work, and I feel that Pharo's recovery log could be improved to help with this. Two scenarios that come to mind are firstly where methods are filed in that created an instance variable at method save the first time round. These log to the transcript that the variable is now undeclared, but that can go unseen, and the result is things appearing to work while you only have one instance of that object. Could this bring up a similar prompt maybe? Another difficulty is that you can not simply file in all selections as any do-it's which were done in a different context will fail. Is there any way we can differentiate the important do-it's such as class definitions, selector removes and so on from the rest? Regards, Chris

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The opposite of encodeForHTTP
by Davide Varvello July 22, 2012

July 22, 2012

Hi there, Does exist the opposite method of String>>encodeForHTTP somewhere? TIA Davide -- View this message in context: http://forum.world.st/The-opposite-of-encodeForHTTP-tp4640491.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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WaveFront File importer on Pharo
by Jean Baptiste Arnaud July 21, 2012

July 21, 2012

Hi, Under the pressure of Camillo i publish the code. I beginning to do a Wavefront (human readable standard for 3d Obj Model ) importer on Pharo. So i made a importer. Not all the case are manage, only the case I need to import the current Obj model. And a drawer which is in Alpha version. face and normal vector are manage. Missing color (in progress), and texturing. You need .obj file and all the .mtl related (open you blender and make it nice). If you are not running on Mac os comment this code in GLWorldTest>>#render, the display makeCurrent. else if you running on mac os implement it in NBMSAAOffscreenDisplay>>#makeCurrent ^driver makeCurrent. My code can be find on JBARepo on squeaksource ObjModel Package but you need NBOpenGL (i do a configuration in same place i just need to be motivated for keep it up to date). So put on same folder of the .image your .obj and .mtl file (i am lazy) (maybe it is VM folder i do not know). open a workspace and do "s := ObjImporter importFrom: 'xwing-map.obj'. s parse. object := s objects. w := GLWorldTest new. object do: [:e | w addElement: e]. w openInWorld." 3d result with normal With normal and color but not texture : Enjoy Best Regards Jean Baptiste Arnaud jbaptiste.arnaud(a)gmail.com

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[ANN] humane assessment / moose courses
by Tudor Girba July 21, 2012

July 21, 2012

Hi, Humane assessment is a method for making software engineering decisions. Assessing software systems to make decisions is a critical activity that needs to be approached explicitly during development. Humane assessment is made possible by the Moose analysis platform. I am organizing a couple of courses in Bern that might be of interest to people on this list: Humane Assessment Primer (August 17) - This course is relevant for both managers and engineers. It covers assessment economics and the means to integrate humane assessment in the development process and in the organization - http://www.humane-assessment.com/courses/humane-assessment-primer Moose Apprentice (September 6-7) - This course is relevant for engineers. This is an introductory hands-on course on using the Moose analysis platform for putting humane assessment into practice - http://www.humane-assessment.com/courses/moose-apprentice If you are interested in participating, please contact me directly. Cheers, Doru -- www.tudorgirba.com "In a world where everything is moving ever faster, one might have better chances to win by moving slower."

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glamorous inspector - extensions
by Tudor Girba July 21, 2012

July 21, 2012

Hi, I see that there is a bit of an interest in the GTInspector, so here are some extra info about it. Beyond the things you can do out-of-the-box with it, the true power of the inspector comes from its extensibility. The idea is to offer each object an easy way to exhibit its own characteristics. This changes the way you can think of interacting with objects. Some more details here: http://www.humane-assessment.com/blog/equal-browsing-opportunity-for-every-… A new feature is the ability to edit code directly in the methods presentation. Combined with the possibility of executing a method in place and previewing the result, this opens the door for a prototype-like programming style. The GTInspector is part of the Glamorous Toolkit. It is still in its infancy, but I think it shows that there is a great deal of possibilities to improve the IDE and to depart from the what we might think is a given. I am still looking for people interested in joining this effort (remember the idea of the ide taskforce). It would be great to get more people interested in improving this part of Pharo. Cheers, Doru p.s. You can get the Glamorous Inspector in the following ways: - download the Moose image: http://www.moosetechnology.org/download/4.7 - download Pharo 1.4 (summer) with the Glamorous Inspector: http://ci.moosetechnology.org/job/glamorous-toolkit-latest-dev/lastSuccessf… - load it in Pharo 1.4: Gofer new squeaksource: 'glamoroust'; package: 'ConfigurationOfGlamoroust'; load. ((Smalltalk at: #ConfigurationOfGlamoroust) project version: #development) load: 'GT-Inspector' -- www.tudorgirba.com "Live like you mean it."

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Pharo 1.4 "Summer" released!
by Esteban Lorenzano July 20, 2012

July 20, 2012

We are proud to announce the summer release of Pharo 1.4! You can find information about Pharo at: http://www.pharo-project.org About this release. We integrated 30 fixes (the rounded number is completely casual) and integrated some tools that users feedback showed as necessary, specially the inclusion of OmniBrowser as part of the core for 1.4. As a result of all this changes and fixes, the stability of this version is a lot better and we are really happy with it. Structural changes to the image: - Backport configurations browser from 2.0. This will easy the loading of packages for everybody, specially newcomers. - Integrated ProfStef. Again, useful for newcomers. - Integrated Spotlight. Easy to find classes and methods. - Integrated OmniBrowser. Nautilus will wait to 2.0 to be core, but it is still loadable. - Integrated Keymapping. This is in fact a sub-product of the inclusion of Spotlight, but the framework is powerful and it deserves its inclusion too :) - Updated Zinc to latest version. Complete list of bugs fixed: - 5665: bug on new ecompletion/ocompletion, http://code.google.com/p/pharo/issues/detail?id=5665 - 5773: Have access to the original event in PLuggableButtonMorph, http://code.google.com/p/pharo/issues/detail?id=5773 - 5584: File Browser not recognizing cs and st if filename has more than one point, http://code.google.com/p/pharo/issues/detail?id=5584 - 5667: Renaming a file just deletes it due to missing #fileNameFromFormattedItem:, http://code.google.com/p/pharo/issues/detail?id=5667 - 5445: Broken command-line arguments in 1.4, http://code.google.com/p/pharo/issues/detail?id=5445 - 5679: Removing a trait does not remove trait methods from class, http://code.google.com/p/pharo/issues/detail?id=5679 - 5722: Be able to remove traits from class definition, http://code.google.com/p/pharo/issues/detail?id=5722 - 5858: DateAndTime >>#hash, http://code.google.com/p/pharo/issues/detail?id=5858 - 5833: More robust allSuperclassesIncluding:, http://code.google.com/p/pharo/issues/detail?id=5833 - 5966: DropListMorph do not pop the list when the text field is clicked, http://code.google.com/p/pharo/issues/detail?id=5966 - 5627: "MessageNotUnderstood: receiver of "displayWorld" is nil" on clicking the red Menu-Halo., http://code.google.com/p/pharo/issues/detail?id=5627 - 5742: BallonMorph shows flyover help using an extra line, http://code.google.com/p/pharo/issues/detail?id=5742 - 6150: During snapshot: Send cr after Transcript message for 1.4, http://code.google.com/p/pharo/issues/detail?id=6150 - 6147: Code completion in all tools for 1.4, http://code.google.com/p/pharo/issues/detail?id=6147 - 6189: [BUG]: Port to Pharo 1.4 - stdin hangs until EOF, http://code.google.com/p/pharo/issues/detail?id=6189 - 6143: MIME decoding and Unicode not working, http://code.google.com/p/pharo/issues/detail?id=6143 - 6188: [BUG]: (1.4) Put back the correct order in #asert:equals:, http://code.google.com/p/pharo/issues/detail?id=6188 - 6187: [Bug]: (1.4) Mouse down events are being processed twice, http://code.google.com/p/pharo/issues/detail?id=6187 - 6117: SimplifiedChineseEnvironment should implement leadingChar, http://code.google.com/p/pharo/issues/detail?id=6117 - 6082: Missed translated selector for the dialog title in the ColorChooserMorph, http://code.google.com/p/pharo/issues/detail?id=6082 - 6231: FileList revert, http://code.google.com/p/pharo/issues/detail?id=6231 - 6303: [BUG]: Completion DNU in Inspector/Object Explorer for 1.4, http://code.google.com/p/pharo/issues/detail?id=6303 - 6305: StartupPreferences "run once" broken, http://code.google.com/p/pharo/issues/detail?id=6305 - 6324: For Pharo 1.4 disable StartupPreferences only for Windows, http://code.google.com/p/pharo/issues/detail?id=6324 - 6313: failing test: MorphicTests.Event.EventHandlerTest.testKeyStrokeFromMorph, http://code.google.com/p/pharo/issues/detail?id=6313 - 6352: StartupPreferences loads non-st files in 1.4, http://code.google.com/p/pharo/issues/detail?id=6352, , - 6373: Add #version to OSPlatform, http://code.google.com/p/pharo/issues/detail?id=6373 - 6366: [Bug]: In 1.4, Finder UI DNU guessTypeByName:, http://code.google.com/p/pharo/issues/detail?id=6366 - 6343: move Windows on screen should take in account the task bar, http://code.google.com/p/pharo/issues/detail?id=6343 - 6386: [BUG]: [1.4]: New ProcessSpecificVariables & Running Processes, http://code.google.com/p/pharo/issues/detail?id=6386 Not bad, isn't? Thanks a lot to all who contributed with fixes, reports and suggestions. The Pharo Team

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alpha testers wanted for app to go Pharo Android
by Robert Shiplett July 19, 2012

July 19, 2012

Folks This little app is still in MIT Curl in alpha, but I will move to Android in at least two or three forms - when Pharo is ready - when Curl CAEDE is ready ( Japanese for "maple" Kaede ) at curl.com - if Red replaces Rebol3 MIT Curl is now owned by Tokyo's SCSK Corp but some pieces are open-source libraries on sourceforge.net Curl is the markup for which I have advocated on the Seaside beach on occasion ( there is still some SGML-bias is a couple of Seaside 3 classes ;-) For a snapshot see http://passphrases.aule-browser.com (plain JPG in plain-old HTML page ) The app is a mnemonics utility for recalling a passphrase which you may have forgotten. Passphrases should be randomly generated as more secure alternatives to passwords. The app uses 4-part passphrases of 4 or 5-letter words. User must recall the punctuation separating the words. At the moment the words are all upper-case. Current word lists are English, but Curl is UNICODE, so many to follow. First ALPHA feedback requested How Annoying is the app already ? (no login, no entry dialog, one passphrase to recognize ) For the URL, please respond to robert -AT- aule-browser.com or to this post or to robert -AT- logiquewerks.com Thanks / merci / danke / gracias / ÑÐ¿Ð°ÑÐ¸Ð±Ð¾ Robert / Fredericton NB / Canada 2 decades in Smalltalk ( and other ; when I want java, I brew some more coffee ; why C# when you could just play D-flat ? )

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Paragraph, TextComposer, MultiCompositionScanner ... is there a backgrounder somewhere?
by phil＠highoctane.be July 18, 2012

July 18, 2012

I have been spending a while on how text gets composited (I want a TextMorph and associated editor that works my way and has nothing to do with SmalltalkEditor). The point is to display/edit reasonably simple math equations. Of course, I am running into text composition at one point. I could display using various morphs instead but I want to do it this way since it also helps me with another project where text is the focus (and links etc). I have looked around quite a bit. Is there a backgrounder on those matters or am I to use the debugger for ages trying to grok it? TIA Phil

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Smalltalk Quine
by Sven Van Caekenberghe July 18, 2012

July 18, 2012

By accident I visited the following website today http://igoro.com/archive/how-to-write-a-self-printing-program/ It is about writing a self-printing program, also known as a quine http://en.wikipedia.org/wiki/Quine_(computing) This has probably been done before, but I had to try to do it in Pharo Smalltalk. Paste the following in a Workspace and either print or inspect it. String streamContents: [ :stream | | lines | lines := #( 'String streamContents: [ :stream | | lines |' ' lines := #(' ' ).' ' stream' ' << ''String streamContents: [ :stream | | lines |''; cr;' ' tab; << ''lines := #(''; cr.' ' lines do: [ :each | stream tab; tab; print: each; cr ].' ' stream tab; << '').''; cr.' ' (lines allButFirst: 3) do: [ :each | stream tab; << each; cr ].' ' stream tab; << '']''; cr.' ). stream << 'String streamContents: [ :stream | | lines |'; cr; tab; << 'lines := #('; cr. lines do: [ :each | stream tab; tab; print: each; cr ]. stream tab; << ').'; cr. (lines allButFirst: 3) do: [ :each | stream tab; << each; cr ]. stream tab; << ']'; cr. ] The result _is_ the same, but it is a bit hard to see because String>>#printString renders the printed representation (doubling quotes). To check you can inspect the string and print it on the transcript (after opening it) Transcript show: self or you can ask the compiler for help Compiler evaluate: self readStream if you inspect the result of the above expression, you can keep on doing this forever. It is also pretty easy to extend the example with your own code. String streamContents: [ :stream | | lines | lines := #( 'String streamContents: [ :stream | | lines |' ' lines := #(' ' ).' ' stream' ' << ''String streamContents: [ :stream | | lines |''; cr;' ' tab; << ''lines := #(''; cr.' ' lines do: [ :each | stream tab; tab; print: each; cr ].' ' stream tab; << '').''; cr.' ' (lines allButFirst: 3) do: [ :each | stream tab; << each; cr ].' ' stream tab; << '']''; cr.' ' self inform: ''Cool, no ?''' ). stream << 'String streamContents: [ :stream | | lines |'; cr; tab; << 'lines := #('; cr. lines do: [ :each | stream tab; tab; print: each; cr ]. stream tab; << ').'; cr. (lines allButFirst: 3) do: [ :each | stream tab; << each; cr ]. stream tab; << ']'; cr. self inform: 'Cool, no ?' ] Just add the extra code twice. Enjoy! Sven -- Sven Van Caekenberghe http://stfx.eu Smalltalk is the Red Pill

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