New Worksheet Release

By Scala IDE team on Oct 23 2012

Today we are announcing a new release of the Scala Worksheet, V0.1.2, available for the Scala IDE V2.1-M2 for both Scala 2.9 and 2.10.0-RC1. It brings to the table an important number of fixes related to worksheet instrumentation. And, it can now be installed on both Eclipse 3.7 (Indigo) and Eclipse 4.2 (Juno)!

Update is recommended for all users.

New and Noteworthy

Let’s have a quick round at what happened in the past month.

Worksheet Instrumentation

The instrumentation component is responsible of producing the worksheet output, which is the one thing that you, worksheet aficionados, really care about. With the previous release, it could happen that perfectly fine Scala code was reported as being erroneous in the worksheet. We considered these issues critical, and we have been working hard to fix all known problems. It should now be much harder to get the worksheet in a state where incorrect errors are reported. But, if you see any, please make sure to file a ticket in our issue tracker.

Editor cut-off value is now per-evaluation

In the Worksheet preferences, you can set the maximum number of output characters to be shown after evaluation. Limiting the output is particularly useful when you are manipulating large data sets. For instance, when mapping elements, you mentally check the transformation is correct only for a small sample of the input data. Now, you are free to set the cut-off value that better suits and the worksheet output of each expression is adapted accordingly.


  • Worksheet wizard should add package declarations. #94
  • Editor cut-off value should be per-evaluation. #93
  • Extract the instrumentation logic from the Scala compiler. #91
  • Error markers lost on save. #87
  • Mac-osx fresh install worksheet wont evaluate anything. #85
  • Error squigglies are not removed/added all the time. #84
  • Multiple top-level objects will cause errors: not found $skip and not found $show. #64
  • Decode special names, as in val * = 3. #62
  • Wrong source instrumentation generation. #32
  • Eclipse 4.2 (Juno) Support. #83
  • Wrong instrumentation for for-loops. #100

Install Now

The released worksheet depends on the Scala IDE V2.1.0-M2. Therefore, make sure you have the it installed, and then, using the same update site, install the worksheet. The worksheet plug-in is listed under the Scala IDE plugins section.

If you are having trouble with the installation, have a look at our Getting Started page.
For any question, feel free to drop us an email in the scala-ide-user ML.

Be Awesome, Contribute!

Did you consider contributing to the worksheet? Yes? What are you waiting for!? Get in touch right now and help us driving the development of the worksheet! Really, the worksheet is actually a fairly simple Eclipse plug-in project, in a matter of hours you will be ready to start hacking your way and immediately deliver value. Still here? Fork the project on GitHub and be awesome!


We would like to take the opportunity to thank all contributors for the amazing work they have done to make this release possible. Special thanks go to Luc Bourlier, Mirco Dotta, Iulian Dragos, Martin Odersky and Amir Shaikhha.