[ANN] New Aconcagua & Chalten packages
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[ANN] New Aconcagua & Chalten packages
 
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Reminds me again how close Smalltalk comes to the real world.
Dont know if the interest rate of 0.1 is still valid after the financial crisis ;) but I always liked this natural expression style of Smalltalk: initialCapital := 100 dollars. interestRate := 0.1 / 1 year. Especially the ease of "1 year", "1 month" or "Date today". If you ever worked with the date and calendar mess in Java you know what I'm talking about. I can even write: 100 m2 100 USD 100 EUR 100 € Unfortunately I cant (yet) write unary messages like this in Smalltalk: 100 $ 100 % Wonder why not. Parser gives "Message pattern expected", maybe because of unary vs. binary. Have to think about it ... -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 _______________________________________________ Pharo-project mailing list [hidden email] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project |
Re: [ANN] New Aconcagua & Chalten packages
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We did that in a financial system that uses Aconcagua and Chalten.... so you have things like:
InterestRate yearlyOf: 10 percent. InterestRate of: 10 percent every: 6 months. and of course: Interest simpleFor: 100 dollars with: (InterestRate yearlyOf: 10 percent) during: 10 years. and Interest compoundFor: 100 dollras with: (InterestRate yearlyOf: 10 percent) during: 10 years withPeriodsOf: 6 months And of course more complex things... anyway, some people call this DSL... :-) On Fri, Oct 9, 2009 at 10:19 AM, Torsten Bergmann <[hidden email]> wrote: Reminds me again how close Smalltalk comes to the real world. _______________________________________________ Pharo-project mailing list [hidden email] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project |
Re: [ANN] New Aconcagua & Chalten packages
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Chalten is also a brilliant framework.
Anyone using the old calendar framework from Smalltalk should take a look at it. Cheers r
2009/10/9 Hernan Wilkinson <[hidden email]> We did that in a financial system that uses Aconcagua and Chalten.... so you have things like: _______________________________________________ Pharo-project mailing list [hidden email] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project |
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In reply to this post by Torsten Bergmann
Yeah!!
I think in a unary % message too... but the syntax become ambiguous. For example: | positive | positive := 8. 1 % positive. It's not clear if % is in binary form and must use positive as a collaborator... or if is a unary message and must then send positive.. :( (By the way I like the % as a unary message more than a binary :P ) It's great with dates too: January first, 2010 works ok in Chalten... Regards, Gabriel
On Fri, Oct 9, 2009 at 10:19 AM, Torsten Bergmann <[hidden email]> wrote: Reminds me again how close Smalltalk comes to the real world. _______________________________________________ Pharo-project mailing list [hidden email] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project |
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