Welcome to the sixth issue of The Left Fold, a weekly programming article digest. Submissions for future issues are solicited.

This week's issue is short, probably due to the Thanksgiving holiday in the US.

Programming Languages

• New language features in Java 7: a summary with examples.

• Announcing Haskell 2010: a new revision of the language has been announced, codifying several existing language extensions. This is the first in an anticipated yearly set of revisions to the language. (shortlist of changes)

• Optional laziness doesn't quite cut it: argues that strict languages with optional laziness lack modularity compared to lazy languages.

• Reviewing Project Lombok: an attempt at reducing Java boilerplate.

Experience Reports

• Gluing Things Together - Scheme in the Real-time CG Content Production: see in particular section 6, which discusses pros/cons from experience of using Scheme in place of C.

• Writing a URL Shortener in Scala: likes the language, unhappy with build and deployment tools. (reddit)

• Recursion and concurrency with Go: introduction via a parallel search algorithm for Connect-4. Likes the concurrency constructs but finds the implementation lacking.

• Rewrite your Ruby VM at runtime to hot patch useful features: implementing memory profiling with trampolines.

• The 8 hour journey to a single character: debugging story with a moral. (news.yc)