I m just investigating OPA and trying to make the leap from a traditional LAMP background, so here s my first of many newbie questions: Can I have two OPA apps sharing the same database, say one ...

I ve used List.exists( ), i woudl like to know if there is an equivalent for Db. If i have a function f(e) : bool, i would like to know if there is at least one element e, with f(e) -> true. ...

example: type person = { name : string ; age : int } db /person : intmap(person) I know how to get a single person from the db, but how do I get them all? and print ...

I notice that included in the source of the OpaWhiteBoard example, there is a .ml file here: https://github.com/hhugo/OpaWhiteBoard/blob/master/src/opacairo/cairo.ml This appears to be OCaml with ...

Is it possible to access HTML5 canvas elements in Opa?

This code source don t compile, Is there a way to make that in OPA ? type User = { nom : string ; prenom : string } un_user = { nom = "My_name" ; prenom = "My_last_name" } : User champ = "nom" do ...

I have seen in the stdlib and in some github project. Code like that : MyClass = field_id(id) = "{id}_field" {{ my_func(args) = output }} What the interest to have function before the {{ }} ...

In MLState s new programming language Opa, is it possible to create a global variable?