PLT Scheme v4.1 has been released. PLT Scheme is a family of Scheme implementations, including DrScheme and MzScheme.
This release includes: the inclusion of the Redex domain-specific language in the default distribution, documentation improvements, improved logging support for MzScheme, bug fixes, a novel type checking mechanism for homogeneous and heterogeneous variable-arity function definitions and applications for Typed Scheme, and other changes.
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