- Pharo-dev - lists.pharo.org

[Pharo-project] Playing with a declarative startup/shutdown subscription mechanism

by Guillermo Polito

Hi! Last days I was playing to replace the image startup/shutdown mechanism via a pragma subscription because I was pissed off with how difficult is to integrate the change of a new startup in the system. The idea is: - reduce the mess on subscription/unsubscription, initialization, etc - reduce dependencies of external packages in core packages. This way, if you want to subscribe a class side method to be executed on startup, you annotate it: SomeClass>>startUp: resuming <systemStartup: #application> self blahblah. SomeClass>>startUp: quitting <systemShutdown: #kernel> self blahblah. Now, instead of an order in classes startup, I played with the idea of having run levels (which I named #kernel, #application and #user because I was not inspired :P). Then I replaced the whole system startup and It's working... The code is very simple, you can have a look at the category *System-Tasks*which can be downloaded from: MCGemstoneRepository location: 'http://ss3.gemstone.com/ss/PharoTaskForces' user: '' password: '' SLICE-Issue-666-Playing-With-startup-GuillermoPolito.2 Be careful, that package contains the startup code + the replacement of the old startup by the new one :). Now, I'd like to have some feedback, u like it? u buy it? which should be the names for the run levels? how many run levels should we have? :P Cheers, Guille

Aug. 5, 2012

Re: [Pharo-project] Differential and Integral calculus in Pharo?

by David Shaffer

On Aug 1, 2012, at 6:03 PM, Clara Allende wrote: > Hi guys, after having exhausting four months of Physics lessons, I decided that would be fun to write a program to deal with Electricity problems :) (Yeah, I'm not a normal person :P) > > So, I need to make differential and integral calculus, are there any libraries to do so? Or any place that I can take a look at? > > Thanks in advance! > > Cheers In case you haven't already come across it: http://sourceforge.net/projects/dhbnumerics/ In my personal experience the algorithms in the book are often naive and problematic compared to industrial-strength numerical algorithms but they are also quite often good enough for a first attempt at some numerical work. David

Aug. 5, 2012

[Pharo-project] Config browser

by Schwab,Wilhelm K

Just getting to 1.4 summer (apologies to those down under) and noted a long list of configs that seem to load cleanly - huge progress!!

Aug. 5, 2012

[Pharo-project] ODBC schema acess - please test

by Schwab,Wilhelm K

see OdbcConnection>>tables, #columnsForTable:owner:, #serverName, etc.

Aug. 5, 2012

[Pharo-project] Question on KeyMapping

by GOUBIER Thierry

Hi, is there a reason for, when dispatching among targets in KMDispatcher, 1- the instanceTarget is at the back of the list of keymapObservers (so that you can't override a class shortcut with an instance one (except randomly, see 2) ?) 2- the list of keymapObservers is a Set ? (so that target matching order is as random as possible, given that's a first matched dispatch ?) Thierry

Aug. 5, 2012