What are the good Scala IDEs at the start of 2010?

Question

I know this is an exact duplicate, but a year has gone by and Scala seems to be a fast moving thing, so I figure it might be acceptable to ask again:

What is the bes

Answer 1

In the context of 2.8, I have used Eclipse 3.5.x with the nightly plug-in and IDEA Community Edition 9.0. IDEA has been clearly better for me, except for compilation times. But I use sbt in parallel and it takes care of that.

My main issues with the Eclipse plug-in are:

• Inability to change my tab settings in Eclipse (though that seems to work for others)
• Code compiles but some errors are still highlighted and I need to close and reopen the file
• Auto-completion just returns a lot of choices

I did not have those issues in IDEA 9.0 build #IC-93.13 with the recent plug-in 0.3.385. Additionally IDEA shows me unused import statements.

All plug-ins seem to be evolving quite quickly and are actively developed and I suspect that what is true today may not be in one month. I hope that in a few months from now, we will just be able to use our favorite IDE and have good Scala support.

(note this is a repost of my recent answer to the original question)