Money units
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Hi
there,
has anybody tried to use the Units
package from squeak map for monetary values?
I'm trying this Units package and
the Avi Bryant's Money package I've found in squeaksource
any general tips for dealing with
currencies?
thanks,
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On 6-Nov-07, at 8:31 AM, Sebastian Sastre wrote: > Hi there, > > has anybody tried to use the Units package from squeak map for > monetary values? > > I'm trying this Units package and the Avi Bryant's Money package > I've found in squeaksource > > any general tips for dealing with currencies? It's a particularly tricky problem since the relative values change frequently, rapidly and chaotically; honestly I would prefer to claim that money is not really a Unit in any meaningful way. Units are really defined values with defined relationships to other derived and founding units. Currency is a medium of exchange with variable ratios. tim -- tim Rowledge; [hidden email]; http://www.rowledge.org/tim MIPS: Meaningless Indicator of Processor Speed. |
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look at Aconcagua in squeaksource
On 11/6/07, tim Rowledge <[hidden email]> wrote:
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We use Aconcagua as the base measure model for our financial applications.
Hernan. On 11/6/07, Ignacio Vivona <[hidden email]> wrote: look at Aconcagua in squeaksource |
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Hey Hernán!
che está buenísimo! sorry...
I'm on it now and actually seems very very promising. I've created a
measure of some money by squared metter of a custom material. This is what I
needed. Awsome
thanks !
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In reply to this post by timrowledge
> It's a particularly tricky problem since the relative values
> change frequently, rapidly and chaotically; honestly I would > prefer to claim that money is not really a Unit in any > meaningful way. Units are really defined values with defined > relationships to other derived and founding units. Currency > is a medium of exchange with variable ratios. > > tim > -- Hi Tim, well regardeless of it's unpredictable nature, money, as medium of exchange measure unit it still *is* a unit. So I don't see why to evade that. But I concur with you about complexities in the relationships and (worse yet) it's historic values. Concretely I don't need (by now) historical or multicurrency features so I'm ecouraged to use it as unit. But if for any reason I do, I think I will have to do something regardeless money it's a simple value or a unit. I think I'll still prefer money as a unit. cheers, Sebastian |
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In reply to this post by Sebastian Sastre-2
The idea of aconcagua is to represent any kind of measure. All our financial math is based on it... for example an interest rate is an instance of InterestRate (not included in Aconcagua) that is a subclass of Evaluation (at the begging called Formula) that is polimorphic with any other measure. That way all the financial formulas are reified and they can participate in any math operation with other measures, evaluations or even numbers... (measures and numbers are polimorphic also). Let me know if you have any problem.
I'll send you the paper... Bye Hernan. On Nov 6, 2007 6:53 PM, Sebastian Sastre <[hidden email]> wrote:
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