February 2017 - Pharo-users

Hash considerations
by Trussardi Dario Romano Feb. 21, 2017

Feb. 21, 2017

Ciao, i have a class with some instance variable. For example a class Product with some instance variable and the = method set to: = anItem anItem ifNil:[^false]. anItem class = self class ifFalse:[ ^false]. ^ rfrConsegna = anItem rfrConsegna and:[ rfrSubTable = anItem rfrSubTable and:[ rfrDcm = anItem rfrDcm and:[ indexRiga = anItem indexRiga and:[ referenceTime = anItem referenceTime and:[ consumer = anItem consumer and:[ item = anItem item and:[ opzioniVoce = anItem opzioniVoce ]]]]]]] Some of these variables are instances of classes with specific implementation and some variables themselves. I set the relative hash method to: hash ^ rfrConsegna hash bitXor:( rfrSubTable hash bitXor: ( rfrDcm hash bitXor: ( indexRiga hash bitXor: ( referenceTime hash bitXor: ( consumer hash bitXor: ( item hash bitXor: ( opzioniVoce hash ))))))) Now my doubt, having many variables affecting the hash calculation, is to be sure that different instances don't give the same hash value. Some advice about it? Thanks, Dario

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running code on image starts and quitting
by Raffaello Giulietti Feb. 21, 2017

Feb. 21, 2017

Hi guys, I need to run some Pharo code whenever the image starts. Similarly on (clean) quitting. What's the recommended practice? Regards RG

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Loading Seaside via Bootstrap in Pharo 6
by Sven Van Caekenberghe Feb. 20, 2017

Feb. 20, 2017

Hi, In my main project I depend on Torsten's Bootstrap project which then loads Seaside. I tried this today on Pharo 6 and it did not work (some internal Seaside dependency could not be resolved). I also noticed that the last commits on Bootstrap were from April 2016. My question now is: is this supposed to work on Pharo 6 ? Thx, Sven

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Re: [Pharo-users] Seeking support: Vote for Jigyasa Grover for Red Hat International Women in Open Source Academic Awards 2017
by Jigyasa Grover Feb. 20, 2017

Feb. 20, 2017

Many thanks for your valuable vote Hayatou :) - Jigyasa -- View this message in context: http://forum.world.st/Seeking-support-Vote-for-Jigyasa-Grover-for-Red-Hat-I… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Coding XPath as Smalltalk
by PBKResearch Feb. 20, 2017

Feb. 20, 2017

Hello I am using XPath as a way of dissecting web pages, especially from Wiktionary. Generally I get good results, but I could get useful extra flexibility by using the binary Smalltalk operators to represent XPath, as mentioned at the end of the class comment for XPath. However, the description there is very terse, and I am having difficulty seeing how to include more complex expressions, especially attribute tests. I have put some of my XPath expressions through the XPath compiler and looked at the output, and out of that I have found expressions which work but look very clumsy. As an example, I have used the fragment: document xPath: '//div[@id=''catlinks'']//li//text()' and found that an equivalent is: document //'div' ?? [:node :x :y|(node attributeAt: 'id') = 'catlinks']//'li'//[:n| n isStringNode]]. (I had to put two dummy arguments in the three-argument block to get it to work.) Is there a more extensive explanation of the use of these binary operators? If not, could some kind person show me the most concise translation of the sample XPath above, to give me a start in working out more complex cases? Many thanks for any help. Peter Kenny

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Equality and hash
by Trussardi Dario Romano Feb. 20, 2017

Feb. 20, 2017

Ciao, i works with Pharo 4.0 environment. I have a class Product with some instance variable and the = method set to: = anItem anItem ifNil:[^false]. anItem class = self class ifFalse:[ ^false]. ^ rfrConsegna = anItem rfrConsegna and:[ rfrSubTable = anItem rfrSubTable and:[ rfrDcm = anItem rfrDcm and:[ indexRiga = anItem indexRiga and:[ referenceTime = anItem referenceTime and:[ consumer = anItem consumer and:[ item = anItem item and:[ opzioniVoce = anItem opzioniVoce ]]]]]]] Some of these variables are instances of classes with specific implementation and some variables themselves. I set the relative hash method to: hash ^ rfrConsegna hash bitXor:( rfrSubTable hash bitXor: ( rfrDcm hash bitXor: ( indexRiga hash bitXor: ( referenceTime hash bitXor: ( consumer hash bitXor: ( item hash bitXor: ( opzioniVoce hash ))))))) Now when add some setup instances of class Product to a bag, the relative inspector report some aProduct entry but with some Occurences of this set to 0. aProduct1 3 aProduct2 0 aProduct3 0 Some consideration about it ? Some references about hash implementations ? Thanks, Dario

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Seeking support: Vote for Jigyasa Grover for Red Hat International Women in Open Source Academic Awards 2017
by Jigyasa Grover Feb. 19, 2017

Feb. 19, 2017

Dear All It feels delighted to be nominated as finalist for *Red Hat International Women in Open Source Academic Awards 2017* owing to my significant contributions to the open source community spanning various organisations & projects viz FOSSASIA, Pharo/Smalltalk, European Smalltalk Users Group (ESUG), Hashkat, Women Who Code, Google Developers Group, Learn IT Girl!, various tech stints in Canada, Europe, Singapore & India, etc. and everyone's best wishes. After initial two rounds, final voting round is open now till March 6, 2017. I request and appeal all of you to kindly bless me with your valuable votes. Folks, Some love & maximum clicks please :wink: Details: https://www.redhat.com/en/about/women-in-open-source Vote here: https://engage.redhat.com/opensourceawards-winners-votingform-2017 -- View this message in context: http://forum.world.st/Seeking-support-Vote-for-Jigyasa-Grover-for-Red-Hat-I… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Adding TextModel widgets dynamically into window
by chrismihaylyk Feb. 19, 2017

Feb. 19, 2017

Hi! I need to add dynamically widgets of TextModel to the ComposableModel window. For example: The object of ComposableModel window is created and opened, and I have a button "Add", if I press the button new TextModel textbox added and showed at the window. Can anyone help me, please, what I need for implementation this logic? Thanks ^_^ -- View this message in context: http://forum.world.st/Adding-TextModel-widgets-dynamically-into-window-tp49… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Bold label
by chrismihaylyk Feb. 19, 2017

Feb. 19, 2017

Hello! I need to get bold text. Can you help me what class I should use and all method to make text bold? Thanks ^_^ -- View this message in context: http://forum.world.st/Bold-label-tp4934321.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Typing a | character with a French AZERTY keybord : problem solved
by Mark Neagu Feb. 18, 2017

Feb. 18, 2017

Hi Everybody, Someone gave me the unique proper way to type a | , and I want to make it available to every person confronted to this problem. It's enough to maintaind the key AltGR and hit the kay 6 of the KBD (not the numeric pad). I'm not sure it will help anyone since I'm not sure someone as simple as me does exist. But who knows? :| Regards Mark

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