rogue

The implicit keyword is extremely powerful when used appropriately and not something that should just be shunned completely. My favorite usage is probably in a typesafe Query engine that several people[1] built at Foursquare that is a lot better than what you can find in the java world. Venue.where(_.closed eqs false) .orderAsc(_.popularity) .limit(10) .modify(_.closed setTo true) .updateMulti It allows for all sorts of typesafe queries that will fail at compile time if things are malformed including stuff like failing to query on an index. https://github.com/foursquare/rogue 1. Hi Jorge, Liszka & Neil!

If you use Scala and mongodb, I highly recommend this DSL: https://github.com/foursquare/rogue Typesafe queries using SQL-like syntax. Particularly when used with the Spindle library (https://github.com/foursquare/spindle), this is best ORM I've ever used.

If you guys really into Scala, I really recommend trying Finagle (https://github.com/twitter/finagle). It was also created by Twitter. It was a lightweight HTTP server and client for Scala. It's my favorite. With just a "single" line of code, you can create an HTTP server in Scala. I usually combine it with Rogue (https://github.com/foursquare/rogue), an "ORM"-like for MongoDB. I used Finagle and Rogue to build a fast and lightweight REST API.

If anyone is interested in looking at a medium sized scala project and deciding for themselves what they think about the language you might want to check out rogue, a MongoDB query DSL that we developed at foursquare. You can see it, source and all, here: https://github.com/foursquare/rogue/

That first claim, that it's as expressive as Ruby, just doesn't hold up to scrutiny. (I've never used Ruby much, but I know my Python, and I'm going to assume they're approximately equally expressive). In no sane Python codebase would you see copy-paste that looks like: https://github.com/foursquare/rogue/blob/master/src/main/sca... or the function/tuple/product classes found here: https://github.com/scala/scala/tree/master/src/library/scala