Beginners August 2019

beginners@lists.squeakfoundation.org

10 participants
20 discussions

OT: Any squeaker in the bay area ?
by Nicola Mingotti 13 Aug '19

13 Aug '19

Hi guys, I am looking for other Squeakers in the San Francisco Bay Area. I live in Menlo Park. Let's meet and organize something! This language/programming-enviroment is beautiful, it is a pity nobody is using it. I was inspired into giving it a shot watching a recorded Ruby conference! bye Nico

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Metacello not updating any package from GitHub?
by Thiede, Christoph 12 Aug '19

12 Aug '19

Hi all, it took me a few hours to find a bug in my image that was raised by an incompletely installed package. The problem only occurs in one of my images, but as my activities in this image were widely restricted to working with recent Inbox commits, I hoped to find a general reason of the defect. I can reproduce the following: In my image, an old version of ToolIconsPlus is installed (it's just an example package). When I do Installer ensureRecentMetacello. Metacello new repository: 'github://Salami555/Squeak-ToolIconsPlus:master'; baseline: 'ToolIconsPlus'; get; load. ToolIcons>>#iconNamed: I receive a KeyNotFound error in the last statement. This is very strange as the package actually defines<https://github.com/ShirleyNekoDev/Squeak-ToolIconsPlus/blob/master/ToolIcon…> the method. When I try to update any other package, no new classes are installed at all. However, installing a new package does work, only updating an existing package does not. Installing the same example package in another image works as expected. Do you have any ideas why this does happen or how to fix? I cannot remember having fiddled around the Metacello/Squot implementation in this image. Running [Installer ensureRecentMetacello] did not help. Best, Christoph

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JSON; Text Encoding; WideString; "Nathan\u2019s"; OSProcess
by John-Reed Maffeo 12 Aug '19

12 Aug '19

*Sorry for the strange title, but my problem touches on all of the topics.* While trying to execute an #OSProcess method "ExternalWindowsOSProcess command:", the image crashes. I think I have identified the source of the problem as encoded data which I have acquired from the web. My application seems to be reliable except in the circumstance when there is \u data in the string which is presented as the Question Mark character #?. The data is in JSON syntax. The raw data string is "Nathan\u2019s". It is converted to "Nathan?s" somewhere, but I have not found the method where it happens. Simple test case: This command fails and the image crashes when the value of ? = 8217. ExternalWindowsOSProcess command: 'cmd.exe /c ', 'echo Nathan?s' The command executes when the ASCI single quote #' is used. ExternalWindowsOSProcess command: 'cmd.exe /c ', 'echo Nathan's' How can I convert the value of an element of a WideString from 8217 to something less than 255? Or do you have a better idea? Thanks, jrm

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Character>>#isSpecial?
by Thiede, Christoph 11 Aug '19

11 Aug '19

Hi, I'm missing a simple selector. I would like to check whether a character is a control character like Esc, an arrow or Character insert. Does there currently exist any better solution than testing [aChar asInteger < 32]? Best, Christoph

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MorphicAlarms
by Christoph Thiede 11 Aug '19

11 Aug '19

Hi, I'm investigating parts of the Debugger's implementation and am just wondering why Debugger>>#contents:notifying: does add an alarm to the world. Never seen this before, what is the purpose of these alarms? And what is the reason of that magic number (200 milliseconds)? I cannot even find any sender of #alarms in my image ... Curious, Christoph -- Sent from: http://forum.world.st/Squeak-Beginners-f107673.html

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BUG in keyboard sequence for commenting region ?
by Nicola Mingotti 10 Aug '19

10 Aug '19

Hi, I am using Squeak5.2, in MacOS. According to Help -> Keyboard Shortcut: ---- Ctrl-' Toggle enclosure within double-quotes Cmd-' Toggle enclosure within single-quotes ---- Neither of those works. The only way to make a selected part of text commented is to press Shift+' . This sequence does not toggle, it just quotes the region. I may have installed a nasty package because I am pretty sure I was able to comment/uncomment regions a few days ago. Do you observe the same behavior ? Post Scriptum: Can you tell me where this is implemented and save me X hours of digging ? :) I would like to change it a bit. Bye Nicola

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Running Squeak in Linux without root access
by Nicola Mingotti 07 Aug '19

07 Aug '19

Hi, I just tried to run Squeak on a server where I don't have root access. I made a patch, in case somebody else need it, it is very short, file paste is at the bottom. Procedure: 1] Download Squeak for Linux 5.2b (x64) from here: https://squeak.org/downloads/ 2] Unzip 3] Enter into the Squeak5.2-18229-64bit-201810190412-Linux directory 4] create file called squeak-non-root.patch and copy/paste into it what is at the bottom. 5] Run this commands: $> cp squeak.sh squeak-original.sh $> patch squeak.sh < squeak-non-root.patch $> ./squeak.sh (create the squeak.conf file locally) $> ./squeak.sh (finally run squeak) This was tested in a Linux server of type: $> cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.6 (Maipo) bye Nicola ---------- squeak-non-root.patch --------------- --- squeak.sh 2019-08-06 18:10:53.506682095 -0700 +++ squeak-new.sh 2019-08-06 18:15:25.078089873 -0700 @@ -10,7 +10,8 @@ ROOT=$(dirname "${DIR}") #obtain dir of the resolved path VM="${ROOT}/bin/squeak" RESOURCES="${ROOT}/shared" -CONF_FILE="/etc/security/limits.d/squeak.conf" +# CONF_FILE="/etc/security/limits.d/squeak.conf" +CONF_FILE="${ROOT}/shared/squeak.conf" IMAGE=$* showerror() { @@ -52,15 +53,17 @@ ensure_conf_file() { local user_input if ! [[ -f "${CONF_FILE}" ]]; then - read -p "${CONF_FILE} is missing. Do you want to create one? -This operation requires sudo permissions. (y/N): " user_input + read -p "${CONF_FILE} is missing. +Do you want to create one? (y/N): " user_input if [[ "${user_input}" = "y" ]]; then - echo "You may be asked to enter your password..." - sudo tee -a "${CONF_FILE}" > /dev/null <<END + # echo "You may be asked to enter your password..." + # sudo tee -a "${CONF_FILE}" > /dev/null <<END + tee -a "${CONF_FILE}" > /dev/null <<END * hard rtprio 2 * soft rtprio 2 END - echo "Done! Please log out and log back in before you try again." + # echo "Done! Please log out and log back in before you try again." + echo "Done!" else ------------------------------------------------

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Introduction into OSProcess
by Christoph Thiede 05 Aug '19

05 Aug '19

Hello, I am trying to run a simple shell command using OSProcess: ExternalWindowsOSProcess command: 'taskmgr.exe' I'm afraid it "does not work", so after evaluating this expression, no window opens and also no icon appears in the systray. If I open cmd.exe and type taskmgr.exe there, taskmgr opens. However, the following works as expected: ExternalWindowsOSProcess command: 'notepad.exe' Using absolute paths did not change the behavior. I installed the latest OSProcess version via SqueakMap. Is this a bug, or is it me? Thanks in advance! Christoph -- Sent from: http://forum.world.st/Squeak-Beginners-f107673.html

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Squeak and computer graphics
by Ralph Boland 04 Aug '19

04 Aug '19

We all hear about graphics cards and the higher performance we get with more powerful cards. But in Squeak we don't address these cards in any direct way (do we?). Is all that computer graphics card power lost to developers in Squeak or does Squeak know to use these cards for more performance when available? Of course modern CPUs add quite a bit of computer graphics capability as well. Does Squeak use this power or is it unused in Squeak as well. Does this issue make Squeak a poor choice when heavy graphics is involved? Is this likely to change in the future? Ralph

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How to rescale child Morph when father does ?
by Nicola Mingotti 04 Aug '19

04 Aug '19

Hi, Considering this short snippet: ------------------- "Prepare the rectangle containing the drawing." r := RectangleMorph new. r extent: 500@500. r openInWindow. p := PolygonMorph vertices: {(r left)@(r top). (r right)@(r bottom)} color: Color white borderWidth: 2 borderColor: Color white. r addMorph: p. -------------------- 1] I see that the PolygonMorph 'p' translates with its father the RectangleMorph 'r'. Ok, as expected. 2] If I rescale 'r' with the Halo yellow button, 'p' is not rescaled and the effect is unexpected. How can I make 'p' rescale with its father ? bye Nicola

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Beginners August 2019