[skyhawk133]

PLT Scheme v4.0 has been released. PLT Scheme is a family of Scheme implementations, including DrScheme and MzScheme.




This release includes: improved syntax for modules, improved support for optional and keyword function arguments, a new syntax for list comprehensions and iterations, a more complete set of string operations, rewritten and reorganized documentation, improved R5RS and R6RS support, support for mutable pairs, the inclusion of Typed Scheme, and other changes.




From: PLT Scheme v4.0 Released

http://xfruits.com/skyhawk133/?id=24877&s_item=232202384


From: http://xfruits.com/s...616_061003.html