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---------- Forwarded message ---------- From: Abderrahim Kitouni <[email protected]> Date: 2013/12/4 Subject: Re: [Vala] vala libgda LINQ To: Daniel Espinosa <[email protected]> Daniel Espinosa <[email protected]> a écrit : >2013/12/4 Luca Bruno <[email protected]> > >> LINQ is just some kind of syntax for some functional programming >aspects. >> It's about to be a 1:1 mapping with filter-map, also fold and scan.. >> >> For example: >> select field1,field2 from collection where field3==value >> can be written as: >> collection.filter((r) => r.field3==value).map((r) => {r.field1, >r.field2}); >> Obviously, LINQ is not only that, but that's a good approximation. >> >> >Vala has provide nice/sexy syntax for GObject/C programing. Have added >lot >of new features, witch have been possible to write in C but with lot of >lines of code. I love Vala because allows me to be more productive, >even >Genie allows more simplification on Vala's syntax. > >I think that former syntax are more productive and easy to read than >the >last. Could allow to work with-in Vala's code with lot of data from a >DataBase or any other data source. GdaData objects and interfaces >allows to >access that data using just GObjects and Vala code, abstracting most of >internal operations and mapping to properties and methods, and allow to >use >Gee collections to make more easy to access to data using by code; but >could reach a next level by adding some syntax support on Vala for SQL >like >queries. > >I know that adding syntax support may is not easy or is far from Vala >principles. > >Then I would like to see a way to allows Vala compiler with a mechanism >of >PLUG-INS for syntax support. Then GdaData could add its own plug-in for >SQL >syntax when it is installed. > >The above allows not to distract Vala from its principles, but allows >to >others add syntax for specific task that makes more easy/productive and >clear way to do the same. > >Less code and clear syntax, allows more productive less errors. > > >> That said, implement filter, map and fold in your collections library >and >> you can avoid the LINQ syntax :-) >> Consider libgee has filter, map, fold and scan with which you can >> implement a large subset of LINQ, including aggregate operators. >> _______________________________________________ >> vala-list mailing list >> [email protected] >> https://mail.gnome.org/mailman/listinfo/vala-list >> > > > >-- >Trabajar, la mejor arma para tu superación >"de grano en grano, se hace la arena" (R) (en trámite, pero para los >cuates: LIBRE) >_______________________________________________ >vala-list mailing list >[email protected] >https://mail.gnome.org/mailman/listinfo/vala-list Hi, I think it might be a good idea to have something like Scala's for comprehensions that would work for all collections (and maybe more). I don't have an example right now though -- Sent from my Android device with K-9 Mail. Please excuse my brevity. -- Trabajar, la mejor arma para tu superación "de grano en grano, se hace la arena" (R) (en trámite, pero para los cuates: LIBRE) _______________________________________________ vala-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/vala-list
