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Racket (formerly PLT Scheme) is a programming language suitable for implementation tasks ranging from scripting to application development, including GUIs, Web services, etc. It includes the DrRacket programming environment, a virtual machine with a just-in-time compiler, tools for creating stand-alone executables, the Racket Web server, extensive libraries, documentation for both beginners and experts, and more. It supports the creation of new programming languages through a rich, expressive syntax system. Example languages include Typed Racket, ACL2, FrTime, and Lazy Racket.

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2012-02-03 10:06 Back to release list
5.2.1

Esta versão adiciona o desempenho melhorado do matcher do Redex, uma biblioteca melhorada "plot", mais agradável olhando plota, customizable duplo eixo carrapatos/transformações, histogramas empilhadas e 3D campos do vetor. Aprimoramentos de desempenho incluem o uso de epoll()/kqueue(), Cruz-módulo inlining e uso de SSE para operações de ponto flutuante JIT-compilado. Seqüências de caracteres literais, regexps, etc. são internados. Scheme utiliza ícones passível de composição produzida com ray tracing, e digitado raquete permite personalizar o tipo erros em macros. "2htdp/universo" suporta um manipulador chave experimental game pad. A biblioteca "db" agora oferece suporte a transações aninhadas e matrizes de PostgreSQL.
This release adds improved performance of Redex's matcher, an improved "plot" library, nicer-looking plots, customizable dual axis ticks/transforms, stacked histograms, and 3D vector fields. Performance improvements include using epoll()/kqueue(), cross-module inlining, and using SSE for JIT-compiled floating-point operations. Literal strings, regexps, etc. are interned. DrRacket uses composable ray-traced icons, and Typed Racket allows customizing type errors in macros. "2htdp/universe" supports an experimental game pad key handler. The "db" library now supports nested transactions and PostgreSQL arrays.

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