Hilaire
what is your requirement?
Stef
Le 10/1/15 22:52, Hilaire a écrit :
It looks like when I want to create a subclass of Float, I have this odd
class creation message. Moreoever, I can add instance variable to this
new class: when compiling there are wipe out: argument
instanceVariableName
Yes change the code of the Parser not to use old code.
As I pointed out, the Parser is a large and complex package, and I am not
the author, so this is easier said than done.
I'm dealing daily with code having the same characteristics.
It seems a bit odd to dismiss
code which worked OK in Mo
Le 11/01/2015 09:06, stepharo a écrit :
> Hilaire
>
> what is your requirement?
>
> Stef
I want to create a currency object, basically a Float with an attribute
to specify the currency unit.
Hilaire
--
Dr. Geo - http://drgeo.eu
iStoa - http://istoa.drgeo.eu
Hilaire,
unless you have very (very very) specific needs, I would strongly
discourage you to use Float for anything related to Money or Percentages.
We use a subclass of Object for MonetaryAmounts and implemented most of
the protocol of Magnitude. But, most importantly, the amount instVar is
Ah, I just saw on second reading that you want to implement something
for currency exchange rates, not MonetaryAmounts. Still, don't use
Float, use ScaledDecimal or FixedPoint and make sure it NEVER contains a
Float. You'll get into all kinds of strange problems, starting with
Imports from data
There are more arguments against Subclassing any Number class:
Exchange rates are two-way most of the times. It is not only USD->EUR,
but also the other way round. This is not the responsibilty of a number.
For more information, I recommend Martin Fowler's Analysis Patterns book
(old, but not
Joachim,
Thanks for the tips.
I saw the Unit package was following the same pattern you are describing.
My first though was to use ScaledDecimal, but I discovered it is pretty
slow with computation (amortization schedule, search for rate) but there
are workarounds for that.
Hilaire
Le 11/01/2015
Hilaire
you have also acancagua that support unit and conversion and aconcagua
came out of a project dealing
with money and trades.
http://sdmeta.gforge.inria.fr/Teaching/CoursAnnecy/0506-M1-COO/
read the two articles in there.
Stef
Le 11/1/15 11:22, Hilaire a écrit :
Joachim,
Thanks for t
Very interesting reading.
The formula in figure 1 is wrong as it is "composed" interest, and power
should be used.
rate := 10 % / 1 year
terms := 6 months
100$ * (1 + rate) ^ terms
So I wonder how the simplification as exposed in Fig. 4 goes in that
case (rate should be transformed to 10/1200)
Hi all,
Just picking up some old threads, so I answer this below.
El 18/09/13 a las 01:19, Stéphane Ducasse escribió:
Hi guys
if Pharo is key for you then you should ask yourself what you did for Pharo
recently.
Writing code, writing documentation helping closing bug entries, participating
t
Good thread I would love also to hear what other Pharoers work behind the
scenes
My own project is Ephestos a visual coding enviroment for Blender . I have
made some good progress in 2014 and I am sure 2015 will bring more
features. Ephestos will benefit the Pharo community by
1) Offering full ac
Usman,
Well I don't have an official bugfix yet, but if you filein the attached
method and run the following, PetitParser will downgrade and get loaded
correctly (at least it worked for me)...The fist two statements are
intended to replace GTMetacelloPlatform with MetacelloPharo30Platform
and
ask the authors they are both in the pharo mailing-list.
Le 11/1/15 16:25, Hilaire a écrit :
Very interesting reading.
The formula in figure 1 is wrong as it is "composed" interest, and power
should be used.
rate := 10 % / 1 year
terms := 6 months
100$ * (1 + rate) ^ terms
So I wonder how th
super!
It is always good to do retrospective analysis to see what we learned
and it looks like you learned a lot.
If you need pharo slides let me know.
Stef
Le 11/1/15 17:21, Offray Vladimir Luna Cárdenas a écrit :
Hi all,
Just picking up some old threads, so I answer this below.
El 18/09/13
Hi,
Yep, would be nice to have that slides to add to my open Zotero
collection about Pharo/Smalltalk
[1]
https://www.zotero.org/groups/diseo_y_creacion_phd_msc_universidad_de_caldas/items/collectionKey/IVQ5BUUC
Cheers,
Offray
El 11/01/15 a las 15:05, stepharo escribió:
super!
It is alw
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