posted by Matthew Flatt PLT Scheme is now 13 years old. The initial version was little more than glue code between a few open-source libraries, which seemed to offer the quickest solution to our modest goals. Modest success leads to bigger goals, however, and then continued success leads to ever more ambitious goals. Before you know it, a mass of users, co-developers, libraries, and documentation
posted by Eli Barzilay With the recent release of Arc, there has been some discussion over hygienic macros. Yes, hygienic macros are usually very convenient, but they can become messy in some ‘corner’ cases. People who learn about macros in Scheme usually start with syntax-rules, and being the limited tool that it is, they often get the impression that for advanced uses (like a macro that captures
blog 14 Sep 2007 posted by John Clements The word “abstract” is common in computer science. An abstract thing is one where some part of the whole is unspecified. For instance, the expression “3*x + 3” is an abstraction of the expression “3*4+3”, because the “x” is unspecified. Likewise, a function is an abstraction over some set of values, supplied when the function is called. The word “general” i
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