Beginners January 2010

beginners@lists.squeakfoundation.org

25 participants
20 discussions

Stepping of ImageMorph
by Hans Gruber 16 Jan '10

16 Jan '10

Hi Guys! An new question von my side again, because I'm quite new in working with Squeak. I wanted to animate an ImageMorph in my project. Therefore I figured out to overwrite the Morphs step method and set the stepTime. But that was not I was really looking for. I want to achieve that the ImageMorph switches between several images regarding to the current key which pressed (key event handling is already implemented in my project). Is there a possibility to start and stop stepping via keystrokes? The next problem would be how to dispatch the different kinds of images changes concerning the current button event. Do you have any hints for me again? Regards, Hans ________________________________________________________________________ Kostenlos tippen, täglich 1 Million gewinnen: zum WEB.DE MillionenKlick! http://produkte.web.de/go/08/

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Re: [Newbies] how to delete imported graphics
by Ken G. Brown 15 Jan '10

15 Jan '10

At 3:27 AM -0800 1/15/10, beginners-request(a)lists.squeakfoundation.org apparently wrote: >Date: Thu, 14 Jan 2010 21:29:00 +0100 >From: Bert Freudenberg <bert(a)freudenbergs.de> >Subject: Re: [Newbies] how to delete imported graphics >To: "A friendly place to get answers to even the most basic questions > about Squeak." <beginners(a)lists.squeakfoundation.org> >Message-ID: <A4D469FA-14BA-41A4-AC22-DF1517BD0B05(a)freudenbergs.de> >Content-Type: text/plain; charset=us-ascii > >On 14.01.2010, at 21:01, Ken G. Brown wrote: >> >> This is latest trunk on Mac Squeak 64-32 5.3b1.app >> >> I've done a couple of file list/import of jpgs. >> I'm wondering where the jpg's are stored and how do I delete them? >> I can see them from World Menu/help/graphical imports but the menubar menu there does not work. > >Here is how I'd go about investigating that: > >1) Type "graphical imports" anywhere. Select it. Press Ctrl-Shift-E. >2) in TheWorldMenu>>helpMenu you find { Imports default . #viewImages} >3) inspect "Imports default" >4) inspect "imports" inst var > >> And what is the magic incantation to apply one of them to be the background of the Squeak window? > >You can find out just the same. E.g., when you select an image in a file list, you can click the "background" button to set it as background. Now you just need to find the code for it: "background for the desktop" is part of its help balloon. Type that, press ctrl-shift-e, follow the implementers chain from #serviceImageAsBackground to #openAsBackground: and there is your "magic incantation". No magic at all ;) > >- Bert - Thx. This enabled me, while rooting around, to fix the bug causing the graphical imports submenu to error while attempting to display. Mantis 7448. Ken

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Using Squeak to teach undergrads OOP
by Stephan Eggermont 15 Jan '10

15 Jan '10

> Some of the faculty panned it because they claimed >the I/O features were either poor or nonexistent. That is a silly argument. Squeak or Pharo don't have really high-performance I/O, but that can hardly be an argument for an introduction to OOP course. Both provide more than enough features, and better ones than java, to do the kind of i/o typically done in such a course. Some better arguments against are: - the user interface is not really consistent, and in the case of Pharo not yet stable; - deep down there are monsters, classes that are way too large and not well refactored. - creating native user interfaces is difficult. I'm not sure the first argument is really important, as every IDE is going to provide conceptual difficulties for a beginner anyway. One could anticipate on the second argument, use it for an assignment (describe three responsibilities of the Morph class), and talk a bit on refactoring. And user interfaces could be web-based in Seaside. Stephan Eggermont

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how to delete imported graphics
by Ken G. Brown 14 Jan '10

14 Jan '10

This is latest trunk on Mac Squeak 64-32 5.3b1.app I've done a couple of file list/import of jpgs. I'm wondering where the jpg's are stored and how do I delete them? I can see them from World Menu/help/graphical imports but the menubar menu there does not work. And what is the magic incantation to apply one of them to be the background of the Squeak window? Thx for any insight, Ken G. Brown

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How do I get the subnet mask in squeak?
by squeak.delta＠web.de 14 Jan '10

14 Jan '10

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Re: [Newbies] Re: Lookaround Regex to manipulate Strings
by Hans Gruber 14 Jan '10

14 Jan '10

Hi Guys! Thank you so much, this worked fine! Regards, Hans > Hans Gruber wrote: > > Hi Squeak Fans! > > > > I have a short question regarding regular expressions in Squeak. > > > > I have the following problem: > > > > I have a fileName and I want to cut off its file extension (.jpg, .png etc.). To do this efficiently I wanted to use regular expressions with lookaround. > > Using regular expressions may be convenient, it sure as hell isn't > efficient. Much easier to use, e.g., > > fileName copyUpToLast: $. > > As for efficiency: > > [1 to: 10000 do:[:i| > 'filename.jpg' matchesRegex: '.+(=?.(jpg|jpeg|png))' > ]] timeToRun. > => 2222 msecs > > [1 to: 10000 do:[:i| > 'filename.jpg' copyUpToLast: $. > ]] timeToRun. > => 30 msecs > > So using regexp's is about 80x slower. > > Cheers, > - Andreas > > > > So let's assume the following: > > > > | fileName | > > fileName := 'test.jpg'. > > > > fileName matchesRegex: '.+(=?.(jpg|jpeg|png))' > > > > I thought there is a possibility of returning the string without file extension through lookaround. > > > > Do you have any hints for me? > > > > Thanks guys! > > > > Regards, > > Hans > > ______________________________________________________ > > GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! > > Jetzt freischalten unter http://movieflat.web.de > > _______________________________________________ > Beginners mailing list > Beginners(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/mailman/listinfo/beginners > ________________________________________________________________________ Kostenlos tippen, täglich 1 Million gewinnen: zum WEB.DE MillionenKlick! http://produkte.web.de/go/08/

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Lookaround Regex to manipulate Strings
by Hans Gruber 14 Jan '10

14 Jan '10

Hi Squeak Fans! I have a short question regarding regular expressions in Squeak. I have the following problem: I have a fileName and I want to cut off its file extension (.jpg, .png etc.). To do this efficiently I wanted to use regular expressions with lookaround. So let's assume the following: | fileName | fileName := 'test.jpg'. fileName matchesRegex: '.+(=?.(jpg|jpeg|png))' I thought there is a possibility of returning the string without file extension through lookaround. Do you have any hints for me? Thanks guys! Regards, Hans ______________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de

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Re: [Newbies] Making requests to an HTML server
by Ken G. Brown 08 Jan '10

08 Jan '10

At 4:00 AM -0800 1/7/10, beginners-request(a)lists.squeakfoundation.org apparently wrote: >Date: Thu, 07 Jan 2010 11:13:48 +0100 >From: G?ran Krampe <goran(a)krampe.se> >Subject: Re: [Newbies] Making requests to an HTML server >To: "A friendly place to get answers to even the most basic questions > about Squeak." <beginners(a)lists.squeakfoundation.org> >Message-ID: <4B45B3DC.2060000(a)krampe.se> >Content-Type: text/plain; charset=ISO-8859-1; format=flowed > >Hi! > >DUFOUR, Stephan (ext.) wrote: >> Hi, >> >> I have several Urls, each giving me a piece of information. >> I want to write some code that gathers these pieces of information and >> make a display of the whole situation. >> >> The principle is: I send a request to one URL then parse the result and >> make a new request to another URL using the parsed result. >> >> I need some code that somehow mimic a human behaviour: it should >> 1) go to a URL and get the content (easy part) >> 2) go to a URL and retrieve some session ID then make a more >> elaborated request (POST, GET, or even trigger some Javascript) > >I have written such a "robot" for a customer, and I need to update it in >the coming days, I will see if I can publish the reusable part of it. > >regards, Gran I am very interested in this. Go Gran! In my case I wish to start with some numbers parsed from the first url, use each of them to create a search at a second pre-known url, then operate on the results of the search to perhaps figure out if there is a pdf download link available. Thx, Ken G. Brown

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Making requests to an HTML server
by DUFOUR, Stephan (ext.) 07 Jan '10

07 Jan '10

Hi, I have several Urls, each giving me a piece of information. I want to write some code that gathers these pieces of information and make a display of the whole situation. The principle is: I send a request to one URL then parse the result and make a new request to another URL using the parsed result. I need some code that somehow mimic a human behaviour: it should 1) go to a URL and get the content (easy part) 2) go to a URL and retrieve some session ID then make a more elaborated request (POST, GET, or even trigger some Javascript) Stephan

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Keep a morph on top
by Danny Chan 04 Jan '10

04 Jan '10

Hi! I am trying to write a little morphic application for retrieving datasets from images of data plots. I have written a little coordinate system morph that I can resize and where I can enter the extreme values. Now I would like to load for example an image from a pdf page, move it around so that the graph I need is on the screen, but somehow ensure that my coordinate system morph stays on top of the image. Is there a way to do this? Danny

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Beginners January 2010