September 2017 - Pharo-users

Lecture starting at Prague
by Stephane Ducasse Sept. 29, 2017

Sept. 29, 2017

Hi Pharoers from monday we are starting a lecture with 130 students at Prague. I will encourage them to ask questions in the learning-help channel and the mailing-list. We will try to help them with Robert and Jan now any help will be welcome :) Stef

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New Pharo booklet: Scraping HTML with XPath
by Stephane Ducasse Sept. 29, 2017

Sept. 29, 2017

Hi we wanted to let you that a new booklet is available on http://books.pharo.org Stef and Peter

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Is a non-break space whitespace?
by PBKResearch Sept. 28, 2017

Sept. 28, 2017

Hello All I have a little puzzle to disturb your Sunday lunch, maybe. I have been scraping text data from web pages, which often comes with redundant space before or after. I routinely use 'trim' on the final string output, but I have found cases where there are still redundant spaces. Inspecting the results, I find that the characters are non-break spaces (codepoint 160, Unicode U+00A0). Looking at the code, String>>#trim depends on Character>>#isSeparator, which does not answer true for a non-break space. I can use trimBoth: [:char| char asInteger = 160] to remove the redundant spaces if I know where to expect them, so it is not a major problem. But the question remains: should non-break space be included in the list of separators in Character>>#isSeparator. Peter Kenny

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How to include DeployUtils in a Configuration?
by HernÃ¡n Morales Durand Sept. 28, 2017

Sept. 28, 2017

I am trying to include DeployUtils in a ConfigurationOf (Pharo 6.1) following instructions at: https://github.com/fstephany/DeployUtils If I include the dependency as suggested: spec baseline: 'DeployUtils' with: [ spec repository: 'github://fstephany/DeployUtils/repository']. then when I load the configuration I get: Error: Unable to resolve project package for 'DeployUtils'. It is likely that that the configuration referencing this project will not validate properly (see MetacelloToolBox class>>validateConfiguration:). If I include the dependency as: spec project: 'DeployUtils' with: [ spec className: #DeployUtils; versionString: 'baseline'; repository: 'github://fstephany/DeployUtils/repository' ]; Then I get DU multiple missing dependencies: This package depends on the following classes: StringStreamLogger Log StdoutStreamLogger You must resolve these dependencies before you will be able to load these definitions: DUFileLogger DUFileLogger>>#withFileLocator: DUFileLogger>>#addLogHook: DUFileLogger>>#defaultFormatter DUFileLogger>>#defaultStream DUFileLogger>>#fileLocator: DUStdoutStreamLogger DUStdoutStreamLogger>>#addLogHook: Log>>#debug:tag: Log>>#info:tag: Log>>#warning:tag: And finally a MNU with #loader: was sent to nil (also when I try to inspect I got a #gtInspectorProjectsIn: was sent to nil) Any ideas? Cheers, HernÃ¡n

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Scraping HTML chapter 2 (soon chapter 3 coming)
by Stephane Ducasse Sept. 27, 2017

Sept. 27, 2017

I came with the idea of this booklet thank to Peter Kenny that kindly answered a question on the Pharo mailing-list. To help, Peter showed to a Pharoer how to scrap a web site using XPath. In addition, some years ago I was maintaining Soup a scraping framework because I was scraping magic web sites and I wanted an application to manage my magic cards. Since then I always wanted to try XPath and in addition I wanted to offer this booklet to Peter. Why because I asked Peter if he would like to write something and he told that he was at a great age where he would not take any commitment. I realised that I would like to get as old as him and be able to hack like a mad in Pharo with new technology. So this booklet is a gift to Peter, a great and gentle Pharoer. Stef

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Force headless mode
by Cyril Ferlicot Sept. 27, 2017

Sept. 27, 2017

Hi, At Synectique we are working on the deployment of a web application and we would like to force the headless mode. We tried to just override the method SmalltalkImage>>#isHeadless to return true all the time be it is not enough because the image is still opened. It is probabaly the vm that open the window. I know we can add some arguments to the command line to open the image as headless but we want to forbid the user to launch the image without headless to protect the code. Is this possible? Do you have some pointers? Thanks in advance. -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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How to find if a method is being executed in a given process
by Steven Costiou Sept. 27, 2017

Sept. 27, 2017

Hi, how can i know if a given method is being executed ? For ex.: process := [[mycondition] whileTrue:[ myObject doStuff. myDelay wait]] fork I want to suspend process and find if doStuff is being executed or if process is waiting. How could i do that ? Steven.

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Scraping HTML chapter 2 (soon 3 will be done :)
by Stephane Ducasse Sept. 26, 2017

Sept. 26, 2017

I came with the idea of this booklet thank to Peter that kindly answered a question on the Pharo mailing-list. To help Peter showed to a Pharoer how to scrap the web site mentioned using XPath. In addition, some years ago I was maintaining Soup a scraping framework because I want to write an application to manage my magic cards. Since then I always wanted to try XPath and in addition I wanted to offer this booklet to Peter. Why because I asked Peter if he would like to write something and he told that he was at a great age where he would not take any commitment. I realised that I would like to get as old as him and be able to hack like a mad in Pharo with new technology. So this booklet is a gift to Peter, a great and gentle Pharoer. Stef

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Call for little tasks for GCI
by Stephane Ducasse Sept. 26, 2017

Sept. 26, 2017

Hi guys We want to compete to a competition for newbies programming. We need to have at least 50 tasks. Right now the tasks are quite difficult to me :) Please help to get some tasks. I can be taken from exercisism.io or other little math problems. - Grab the Pharo logo from url and display it - We can turn some of the mooc challenges into tasks. http://mooc.pharo.org I have some ideas but I need your help because I want to finish the new chapter and book. https://github.com/jigyasa-grover/GCI-2017-with-Pharo Stef

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About encoding
by Stephane Ducasse Sept. 26, 2017

Sept. 26, 2017

Hi sven the web site I was using remove the file for my book. So I copied the file on github. When I open the file with texmate it tells that the encoding is western-latin1 but when I try to load it as follow I get an UTF-8 illegal error. | lines | lines := (ZnDefaultCharacterEncoder value: ZnCharacterEncoder latin1 during: [ ZnClient new get: 'https://raw.githubusercontent.com/SquareBracketAssociates/LearningOOPWithPh…' ]) lines. Do you have any idea? Tx Stef

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