Opa: attractive web development in cloud age

Opa combines in a single model server and client programming. It can take care of persistence of let you choose MongoDB. Following the node.js influence the latest version can use a javascript like syntax.
Let's see how it looks like:

With easy you use the # marker for HTML IDs, e.g. #vala, used here for input box. Reading the value using

is easy like writing it back to another HTML element identified by ID

Give it a try:

$ opa easycalc.opa
$ ./easycalc

Then point Chrome (or your favourite browser) to http://localhost:8080/. Opa compiler will take care of everything!

Have fun!