October 2014 - Pharo-dev - lists.pharo.org

New methods for the String class
by Daniela Meneses July 31, 2015

July 31, 2015

Hi to all, As you may know I'm working on in some improvements for the String class. Until now I implemented some missing tests. Right now I'm looking forward to add new methods that could be useful based on Ruby API ( http://www.ruby-doc.org/core-2.1.0/String.html) These are a few of the methods that I'm planning to implement: - chomp(separator=$/) -> new_str - chop() -> new_str - ljust(integer, padstr='') ->new_str - next -> new_str - partition(sep) -> [head, sep, tail] Could you help to find out if these methods are already available for the String class? If you have any idea of new methods for the string class, will be really welcome. -- Cheers , Daniela Meneses

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MongoTalk: new place on smalltalkhub
by FranÃ§ois Stephany July 23, 2015

July 23, 2015

Hi, I've just created a new team for MongoTalk on SmalltalkHub: http://www.smalltalkhub.com/#!/~MongoTalkTeam The old repo (http://www.smalltalkhub.com/#!/~francois/MongoTalk) will stay just in case some scripts rely on it but you should update to the new repo: http://www.smalltalkhub.com/#!/~MongoTalkTeam/mongotalk I've created a version 1.5.1 in the Metacello configuration to reflect the repo migration. Shout at me if I missed something! Cheers, Fa (Many thanks to Norbert for pushing the migration ;)

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ctrl+a is seen as ctrl+home windows
by Tudor Girba May 31, 2015

May 31, 2015

Hi, I am on Windows, using Pharo 3.0, and I am trying to get the keybindings to work in Rubric using Windows convention (so, Ctrl instead of Cmd as a modifier), It worked reasonably well, but the problem is that somehow Ctrl+a is mapped to Ctrl+Home. The problem is not specific to Rubric as I can detect the same behavior in the regular PluggableTextMorph. Does anyone have an idea of where the problem comes from? Doru -- www.tudorgirba.com "Every thing has its own flow"

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Playground and its current usability in Pharo4.0 Latest update: #40307
by Torsten Bergmann April 24, 2015

April 24, 2015

While I like that GTTools are in Pharo 4 now (thanks!!!) and allow all kind of neat things I basically ask myself if we forgot to remember usability on a few places: 1. the world menu item "Workspace" opens a window "Playground" including also a tab with the same name "Playground". => CONFUSING I would suggest that we rename the window "Workspace" and keep "Playground" for the initial tab. This is easy to fix and would also fulfill the expectation when a beginner grabbed an existing Smalltalk or Pharo book. 2. While in all UI interfaces (Windows, Linux, Mac) the order in the context menu is "Cut", "Copy", "Paste" the playground menu uses a different order "Copy", "Cut" "Paste". => CONFUSING again I would suggest to use the well known order "Cut","Copy","Paste". 3. When one uses "Inspect it" from the context menu it means - to run the code - and the resulting object is then "inspectable" in a new window On the other side "Do it and go" from the context menu means - to run the code - and the resulting object is then "inspectable" in a new pane (but same window) The intention of both menu items and also the result is the same, but the naming is different ("go" vs. "inspect"). But the only notable difference is that in one case the inspectable object is opening right to the existing pane in the other case a new window is opened. => CONFUSING and inconsistent This is harder to solve. Possible solutions are: 3a. We keep the "inspect" concept and name the menu items "Do and Inspect it" and "Inspect in new window" 3b. We keep "Do it" as before to run the code, also "Inspect it" which opens the new pane to the left in the same window. If someone wants to open a new inspector window he should keep SHIFT key pressed while running "Inspect it". This is a concept known from web browsers and other tools today, clicking on a link while pressing SHIFT opens a new window. 4. The icons in the context menu of Playground are not the same as the ones in the Pharo browsers. => CONFUSING and inconsistent They are just black and if one switches to the Pharo dark theme they stay black and therefore looking ugly and make nearly no sense on the dark grey menu background. For now we should use the known icons that we already have. Maybe currently they are hardcoded and may conflict with Moose vs. Pharo icons - but this could be solved with the Icon Theming. (In the long term I would like to see scalable icons in Pharo menues (instead of bitmaps) similar to "Fontawesome" in web browsers (two colors) or SVG based ones (more colors) as currently the icon does not scale when changing the menue font size). Sorry if it sound like a rant - but the intention of this mail is that we discuss (and hopefully fix) in order to improve. Maybe it is written too early after the initial integration, but I think the mentioned points should be easy to address. Unfortunately I'm additionally confused with the changed contribution process that has exceptions for specific packages like GT to fix it myself with the usualy bugs/slice cycle. Thanks T.

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[Pharo-project] RTF reader/writer
by StÃ©phane Ducasse April 8, 2015

April 8, 2015

Hi guys Do you know if there is a library somewhere in Smalltalk to deal with RTF writing/saving? Stef

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Super fast delay
by Norbert Hartl March 10, 2015

March 10, 2015

I just recognized that Delay is working in a strange way on my linux box $ time pharo-vm-nox ./Pharo.image eval "(Delay forSeconds: 5) wait" a Delay(5000 msecs) real 0m0.158s user 0m0.136s sys 0m0.020s I use the vm from the ppa. What do you get when you execute it? Norbert

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Keyboard Event Weirdness
by Sean P. DeNigris March 2, 2015

March 2, 2015

I put the following halt in HandMorph>>#handleEvent: anEvent isKeyboard ifTrue: [Transcript show: anEvent printString, ' keyChar: ', anEvent keyCharacter asString, ' keyValue: ', anEvent keyValue asString; cr]. Then I typed 'hi' in a Workspace and hit Cmd+a. Look at the weird Transcript output... [keyDown ''] keyChar: keyValue: 4 [keystroke 'h'] keyChar: h keyValue: 104 [keyUp ''] keyChar: keyValue: 4 [keyDown ''] keyChar: keyValue: 34 [keystroke 'i'] keyChar: i keyValue: 105 [keyUp ''] keyChar: keyValue: 34 [keyDown '<Cmd->'] keyChar: keyValue: 0 [keystroke '<Cmd-a>'] keyChar: a keyValue: 97 [keyUp '<Cmd->'] keyChar: keyValue: 0 It seems the keyUp/Downs do not have the correct charCode and the keyValue is different than the keystroke for the same key. What's going on here? ----- Cheers, Sean -- View this message in context: http://forum.world.st/Keyboard-Event-Weirdness-tp4737056.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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Configurations and Github for a specialised configuration browswe
by kilon alios Nov. 15, 2014

Nov. 15, 2014

So I am so happy with how Pharo works with Github, that I decided to even port my configurations there and I also decided to create a small configuration browser which will subclass the existing configuration browser for installing tools for my project Ephestos so I dont have to pollute the existing configuration projects with all my sub-projects. In sort I want to host configurations to Github similarly to how MetaRepos are host in Smalltalkhub. I want the user to be able to install those configurations without a need to install git I asked this I think before and I was told how to, but it was part of another thread and it got lost inside my email abyss. So How I do that ?

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[DEV] Systemd socket activation patch for the VM
by Max Leske Nov. 14, 2014

Nov. 14, 2014

Hi folks As promised a long time ago my colleague Nik Lutz has finalized the patch for the VM that enables socket activation with Systemd. I will quickly go over what the patch is supposed to achieve, how we plan to use socket activation and what (minimal) changes are necessary. Systemd Socket Activation: Systemd opens a (network-) socket and waits for connections. When the first client connects the assotiated service (VM) is started. Systemd indicates via environment variable (LISTEN_FDS) that it opened a network socket. Detailed documentation on socket activation with Systemd can be found here: http://0pointer.de/blog/projects/socket-activation.html Our scenario for socket activation: At Cmsbox we have hundereds of images running on a server, all of which listen on a dedicated network port for incoming connections. The server is powerful enough to run all these processes concurrently, especially since not every image receives requests all the time. With socket activation we could further lower the server load and free up resources for images with a high request rate. Images that donât receive any requests for a specified amount of time can be suspended automatically and reactivated when a request comes in. The VM Patch: The attached patch tries hard to be minimal. It defines a new socket type (ProvidedTCPSocketType) which you will also find in the image (Socket>>newSystemd). ProvidedTCPSocketType is special in that it can refer to an existing TCPSocket and does not necessarily entail the creation of a new socket. The changes in the image: - Socket>>newSystemd tries to open a new Systemd socket. - TCPListener>>haveSystemdAssignedPort tests if the LISTEN_FDS environment variable has been set by Systemd for the current process. - TCPListener>>primEnvironmentAtSymbol is a utility method that we need to check for the environment variable (IMPORTANT: copied from OSProcess; uses the OSProcess plugin) - TCPListener>>pvtNewListener: has been modified to include the check for the Systemd port. If the socket has been assigned by Systemd, use a Systemd socket, a TCP socket otherwise Quick Howto: - Adapt path to vm and image in pharo@.service - Take a Seaside image and FileIn systemd.cs (tested with http://seaside.st/distributions/Seaside-2.8.4.zip) - Save as 9999.image - Copy pharo@.service and pharo@.socket to /etc/systemd/system - As root run: systemctl daemon-reload systemctl start pharo(a)9999.socket - Open http://localhost:9999/seaside/config [- systemctl stop pharo(a)9999.socket] -> Upon connection pharo(a)9999.socket starts: pharo(a)9999.service (which would start .../9999.image) You can see this in action in the following screencast: http://youtu.be/MVPLZNKg5j8 We hope that this patch (or some version of it) will find its way into the VM. If you have any questions please feel free to ask. Cheers, Max (on behalf of Nik and the rest of Netstyle.ch)

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LRUCache for high latency stuff
by Thierry Goubier Nov. 4, 2014

Nov. 4, 2014

Hi all, I tried to use LRUCache for some application of mine with a two stages, over-the-internet data requests, and I couldn't find a way of using it. My use case was: - retrieve some data with high latency (over 10 seconds) - in a interactive application, where I need to be able to continue while the data is being loaded. So I designed it in two stages: - Have a cache - if the data isn't in the cache -- trigger a load with a fork -- put some temporary data in the cache (something which says loading) -- continue - When the data load is terminated -- replace the cached temporary data with the final version. The thing is that I couldn't do the last one with the LRUCache (there is not at:put:, only a at:ifAbsentPut: []). Did I miss something? Thierry

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