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

Stylistic question: private helper vs extension method?
by Herby VojÄÃk Aug. 9, 2017

Aug. 9, 2017

Hello! I've got this portion in my delegate: requestPayload ifNotNil: [ uuidKeys do: [ :each | requestPayload at: each ifPresent: [ :s | requestPayload at: each put: (UUID fromString: s) ] ] ]. responsePayload := self towergame clientSync: requestPayload. responsePayload ifNotNil: [ uuidKeys do: [ :each | responsePayload at: each ifPresent: [ :uuid | responsePayload at: each put: uuid asString ] ] ]. Now I would gladly use something like Dictionary >> at:ifPresentTransform: aBlock. But it is not present, so I have two choices: 1. Add it as extension method, but then it may clash if someone else has similar idea. 2. Add private helper TowergameDelegate >> dict:at:ifPresentTransform:, which is longer and needs additional self receiver. Which is preferable? Herby

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API docs as HTML
by Offray Vladimir Luna CÃ¡rdenas Aug. 9, 2017

Aug. 9, 2017

Hi, For the JOSS (Journal of Open Source Software) I need to add to a package documentation the API documentation as an external file (hopefully in HTML). So I would like to export the source code in a way that can be used as API documentation. I remember that some API documentation about Smalltalk/Pharo can be found online, but I don't know how to produce such documents. Any pointers to explore? Cheers, Offray

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Problems verifying the cryptographic signature of a file.
by Offray Vladimir Luna CÃ¡rdenas Aug. 9, 2017

Aug. 9, 2017

Hi, I'm having problems to verify the cryptographic signature of a file. It seems that the test is running, some times, while the file is being created, and some times when the file writing is finished (which is my purpose). How can I run the cryptographic signature verification only after the writing of the file is finished? I imagine that is something related with jobs and completion, but I don't know where to look for, specifically. Any hints and suggestions are welcomed. Cheers, Offray

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gtInspector override default select behavior
by Evan Donahue Aug. 9, 2017

Aug. 9, 2017

Hello, I have a gtInspector extension a tree-structured object. By default, when I click on one of the objects in the gtInspector, the inspector opens up another inspector on that node (using the finder-style display). What I would like to know is, is it possible to override the default click behavior so that, instead of opening the next inspector on that node of the tree, it opens on the result of a block run on that tree. Specifically, I have this: gtInspectorSource: composite <ignoreForCoverage> <gtInspectorPresentationOrder: 10> composite tree title: 'Source'; children: [ :r | r sourceChildren ]; format: [ :r | r sourceName ]; display: self and I was hoping there was some way I could do something like this: ... display: self; onSelectAction: [ :r | r next ] so when I click, I get an inspector not on the node of the tree r, but on r next. Thanks, Evan

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Problem with ThreadPool on os windows - no execution
by Sabine Manaa Aug. 7, 2017

Aug. 7, 2017

Hi, because of [1] I use ThreadPool [2] and while developing on my mac it worked fine. But now, testing it on my production server which is a windows machine, it does not work which means, it is some kind of magic, the code within the block [anObject doSomething] queueWork is not run. When changing it to [anObject halt doSomething] queueWork the code is run! Changing my code from >>queueWork back to >>fork proves that everything is fine now and there is a problem with ThreadPool. When I was playing around to find the problem, I noticed the following: I created a button like this: html mdlButton onClick: (html jQuery ajax script: [ :script | | theSession | theSession := self session. [ theSession inspect ] queueWork. ]); with: 'test' Mac: it works nearly immediately Windows: it does not work ... except when I add a halt in it but: When I then do this after clicking on the test button: 20 timesRepeat: [[ Transcript crShow: Time now printString] queueWork ], the sessions inspector also comes up It seems that the process is hanging until the next work is to be done. Before going deeper in it my question is: does anyone use it on windows? is it made for windows, too? are there any experiences with windows and ThreadPool? did I miss something? how can I fix this? Regards Sabine [1] http://forum.world.st/ThreadPool-with-Seaside-how-td4956812.html#a4957192 [2] http://smalltalkhub.com/#!/~pdebruic/ThreadPool/

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Best Practices for Bundling Documentation
by Evan Donahue Aug. 7, 2017

Aug. 7, 2017

Hello, I'm working on cleaning up a couple of projects for release, and I was wondering what the best practices were for including appropriate documentation with projects. Should I just drop a text blob in a prominent class comment? Is there a tool for structuring documentation? Is documentation typically kept separate from the code? Seems natural to include it so you never have to leave the image, but I'm not sure what most people do. Thanks, Evan

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Lazy-initialization patterns
by Esteban A. Maringolo Aug. 7, 2017

Aug. 7, 2017

Hi there, I have a question about lazy initialization accessor methods that always keep me thinking in terms of performance and style. For years I did something like: MyClass>>#property property isNil ifTrue: [ self initializeProperty ]. "It could be ifNil: as well" ^property MyClass>>#initializeProperty "Returns the receiver, not the property." property := self foo collect: [:e | ... ]. But this made me think that maybe I'm performing extra operations, so I started doing something like: MyClass>>#property ^property ifNil: [ self initializeProperty ] MyClass>>#initializeProperty ^property := self foo collect: [:e | ... ] The initialize method is often created by an "Extract Method" refactoring I do in the accesor, where I do the initial implementation. The messages makes me think that the second implementation is "faster", but an initializationMethod returning the value instead of the receiver is a code smell to me. I early initialize everything I know will be be used right away, but for cases it doesn't make sense. What do you think/prefer? Why? Maybe we could use the reified variables (slots) to implement the lazy initialization themselves :) Best regards! Esteban A. Maringolo

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Fetching https site content with Zinc
by Henrique Rocha Aug. 7, 2017

Aug. 7, 2017

Hi there, I am trying to automate the fetching of a site content in Pharo. Basically, I want to fetch smart contract information from Etherscan. Here is an example URL: https://etherscan.io/address/0xbcff2d15c698d3874bc29aa170c89fd7a6146a4b#code I tried to use Zinc to fetch that, here is my code (very simple): ZnEasy get: 'https://etherscan.io/address/0x9C169d81420aAD7D8a0D6d9F295C3ba2C33575De#code' Although it runs without errors the fetched content is "Bad Request - Invalid URL" and not the actual website. Anyone know what am I doing wrong here? -- View this message in context: http://forum.world.st/Fetching-https-site-content-with-Zinc-tp4959072.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Glorp: `session login` fails for Garage SQLite
by Herby VojÄÃk Aug. 6, 2017

Aug. 6, 2017

Hello! First of all, what is preferred way to (first time) login into database? I had the impression that `aDatabaseAccessor login` is sorta low-level, and one should do `session login` (after all, it is session you get to work with, not an accessor). But with Garage SQLite, `session login`, when accessor is not logged, always fails with "MessageNotUnderstood: GASqlite3Driver>>queryEncoding". Should one not use `session login` at all, then (when accessor is logged, it just does nothing, if it isn't, it connects the accessor, but tries to do some additional work which always fails)? Herby

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problem with FLMaterializer
by Johannes Brauer Aug. 5, 2017

Aug. 5, 2017

Hi everyone, trying to migrate a Seaside application from Pharo4 to Pharo6 I get a problem with FLMaterializer. An expression like (FLMaterializer materializeFromFileNamed: aFileRefence) results in MessageNotUnderstood: FileReference>>convertToWithConverter: The same file can be materialized in Pharo4 without problems. Johannes

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