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Cè¨èªã£ã¦lambdaãæ¸ããªãã®ã§GUIã®ã³ã¼ã«ããã¯ãªãããä½ãå ´åã«ã¯é¢æ°ãç¨æããªããã°ãªããªãã®ã§ãã... Lambda abstractions in C++ vs. Scheme 1. Simple lambda-expressions #define Lambda(args,ret_type,body) \ class MakeName(__Lambda___) { \ public: ret_type operator() args { body; } } http://okmij.org/ftp/c++-digest/Lambda-CPP-more.html ãªãã»ã©ãã¼ããããªã Lambda((int a, int b), int, return a+b) foo; std::cout << foo(1, 2) << std::endl; // 3 ãããªæ¸ãæ¹ã
Lambda abstractions in C++ vs. Scheme This article is to exhibit lambda abstractions in C++ in comparison with those of traditional functional languages (e.g., Scheme). The article will try to demonstrate that "applicable values" in C++ not only look similar to their functional cousins. They are equal in meaning as well. The same can be said for currying. This article will not prove that C++ and S
Posted by nanki Wed, 28 Oct 2009 05:25:00 GMT Haskellã«ã¯Maybeã¢ããã¨ããã®ããã£ã¦ãã¨ã©ã¼å¦çãããªãé©å½ãªæãã«æ¸ãã¦ã¨ã¦ã便å©ããã ä¸æ¹ãå¤ãã®ããã°ã©ãã³ã°è¨èªã§ã¯ã request.mobile && request.mobile.docomo? File.open('example.txt').read rescue nil # ããã¯ããã横ç class Never instance_methods.each do |v| undef_method(v) unless %w(__id__ __send__).include?(v) end def method_missing(*args) self end def end nil end end class Maybe < Never def initialize
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