Wasn’t there a recent financial app in Pharo that was made open source... there might be many ideas in it, and possibly a starting point.
It’s in the success pages of pharo: Quuve, there are posts from Mariano about what tech they used too Tim > On 10 Apr 2020, at 09:13, "teso...@gmail.com" <teso...@gmail.com> wrote: > > Hi Tomaz, > > From the comments about the requirements you do I suggest: > > - For data storage, my recommendation goes depending on two factors: > 1)Installation complexity, 2) volume of data. These are two variables > that will be against one and the other. I will recommend to use > MongoDB + Voyage, that goes very well. It grows excellent with the > amount of data, it has really cool integration with Pharo and Voyage > is an excellent mapping tool; also it is a mature solution and it has > a lot of support for back-up schemes and solutions. Using MongoDB > complicates the installation process, so if you have the idea of a > easy installable application maybe SQLlite is a good alternative. > > - I think using Spec2 + GTK + Roassal3 + Polymath is a good idea. > Check that Spec2 and Roassal3 are still under heavy development. They > are getting much better, but of course, it will take some time to > stabilize; but both of them are progressing very fast and they are > already quite stable. > > - For developing DSL and interactive programming for non-programmers > users, Pharo is ideal. It presents a lot of tools to easily develop > DSL and the UI to make them work excellent. The idea of live > manipulation of objects and inspection of all the instances can be > easily added to a DSL. > > Thanks for your attention! > >> On Thu, Apr 9, 2020 at 9:13 PM Tomaž Turk <tomaz.t...@ef.uni-lj.si> wrote: >> >> Dear all, >> >> I'm thinking about implementing a software solution in Pharo (as one of the >> candidate environments), it's a project that I'm dealing with >> professionally. The goal is to develop a financial planning/simulation >> application on the country level, which is at present developed as a set of >> interrelated Excel spreadsheets. The requirement is that the solution should >> be more "manageable", resilient and straightforward than Excel permits, that >> it should present a workflow to the user - i.e. , that the tasks the user >> should do are suggested through the GUI. >> >> The majority of the data is in a form of a time series (for instance: GDP >> for a series of years). There are many variables in the model which shoud be >> calculated from other variables, year by year. There are also lagged >> variables (the value for the current year depends from the value of previous >> year), and running averages. There are also some variables which are not >> time series (parameters). As a part of GUI, there is a need to present the >> results as diagrams, too (scatterplots, line charts), otherwise tables are >> the output. >> >> I found Pharo to be a very elegant language and environment, with version >> 8.0 it became pretty stable, however I don't have any experiences in >> building software solutions of this type in Smalltalk. In other words, I'd >> like to be more confident in setting the architecture, both in the sense of >> the model content (variables interrelation) and the architecture of classes. >> Besides, for the calculated variables I'd like to have a relatively simple >> syntax to define them (like 'GDPpC <- GDP / Population'). >> >> My thoughts and questions: >> - for easier maintenance I'd like to separate the data from the code - so >> the question is what would be the best way to implement persistence (another >> Pharo image - with what?, some relational database, XML/JSON, flat files >> ...) >> - I wonder what would be the best "architecture" of classes - so, we have a >> lot of aggregate variables like GDP and population, which can be grouped at >> least according to the stage in the planning workflow. There are also >> resulting (calculated) variables (e.g. GDP per capita). On the other hand, >> since this is a planning software, it's a kind of simulation, where we have >> a "data warehouse", experiments and results >> - As a core packages I would use Spec2, Roassal, and PolyMath. >> >> I'm just thinking aloud, and would greatly appreciate any thoughts from >> experienced Pharoers :-) >> >> Best wishes, >> Tomaz > > > > -- > Pablo Tesone. > teso...@gmail.com >
