{"id":526,"date":"2009-01-30T12:36:09","date_gmt":"2009-01-30T04:36:09","guid":{"rendered":"http:\/\/blog.axqd.net\/?p=526"},"modified":"2009-01-30T12:36:09","modified_gmt":"2009-01-30T04:36:09","slug":"beautiful-code","status":"publish","type":"post","link":"https:\/\/blog.axqd.net\/?p=526","title":{"rendered":"Beautiful Code"},"content":{"rendered":"

<Beautiful Code>\u4e00\u4e66\u4e0d\u7b97\u8584\uff0c\u91cc\u9762\u768438\u4f4d\u4f5c\u8005\uff0c\u4e5f\u7b97\u5f97\u4e0a\u4e2a\u9876\u4e2a\u7684\u725b\u3002\u4f46\u603b\u7684\u6765\u8bf4\uff0c\u4fe1\u606f\u91cf\u5374\u4e0d\u592a\u5927\u3002<\/p>\n

\u8010\u7740\u6027\u5b50\u770b\u5230\u6700\u540e\u4e00\u7ae0\uff1a<Writing Programs for “The Book” by Brian Hayes>\uff0c\u5374\u7a81\u7136\u6709\u773c\u524d\u4e00\u4eae\u7684\u611f\u89c9\u3002<\/p>\n

\u6211\u5bf9Brian\u8fd9\u4e2a\u4eba\u4e0d\u592a\u719f\u6089\uff0c\u4ece\u4e66\u540e\u7684\u4ecb\u7ecd\u4e2d\u5f97\u77e5\uff0cBrian<\/a>\u662f<American Scientist>\u8ba1\u7b97\u673a\u4e13\u680f\u7684\u4f5c\u8005\u3002\u6bd4\u8d77\u5176\u4ed6\u51e0\u7bc7\u6587\u7ae0\uff0c\u8fd9\u7bc7\u5728\u6587\u5b57\u4e0a\uff0c\u660e\u663e\u8981\u81ea\u7136\u6d41\u7545\u4e00\u4e9b\u3002<\/p>\n

Brian\u5728\u672c\u4e66\u4e2d\u8ba8\u8bba\u7684\u95ee\u9898\uff0c\u5176\u5b9e\u5f88\u7b80\u5355—\u5224\u65ad\u4e09\u70b9\u5171\u7ebf\u3002<\/p>\n

\u6211\u4eec\u4eba\u5728\u5224\u65ad\u8fd9\u4e2a\u95ee\u9898\u7684\u65f6\u5019\uff0c\u81ea\u7136\u53ef\u4ee5\u7b80\u5355\u7684\u8fdb\u884c\u76ee\u6d4b\u3002\u5f53\u76ee\u6d4b\u4e0d\u8db3\u4ee5\u533a\u5206\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u8fde\u63a5\u4efb\u610f\u4e24\u70b9\uff0c\u63a5\u7740\u770b\u53e6\u5916\u4e00\u70b9\u662f\u5426\u5728\u90a3\u6761\u76f4\u7ebf\u4e0a\u3002<\/p>\n

\u653e\u5230\u7a0b\u5e8f\u91cc\uff0c\u6700\u81ea\u7136\u7684\u601d\u8def\u83ab\u8fc7\u4e8e\uff0c\u8fc7\u540c\u4e00\u70b9\u8ba1\u7b97\u5e76\u6bd4\u8f83\u659c\u7387\u3002\u7136\u800c\uff0c\u8bda\u5982\u4e66\u4e2d\u6240\u8a00\uff0c\u8ba1\u7b97\u659c\u7387\u7684\u65b9\u6cd5\u6709\u4e00\u4e2a\u8fb9\u754c\u6761\u4ef6—\u5e73\u884c\u4e8eY\u8f74\u7684\u76f4\u7ebf\u659c\u7387\u4e0d\u5b58\u5728\u3002\u5bf9\u4e8e\u8fd9\u4e9b\u8fb9\u754c\u6761\u4ef6\uff0c\u4e0d\u5f97\u4e0d\u52a0\u4e0a\u6761\u4ef6\u8df3\u8f6c\u53bb\u5904\u7406\u3002\u66f4\u4e3a\u7cdf\u7cd5\u7684\u662f\uff0c\u5982\u679c\u4e09\u4e2a\u70b9\u4e2d\uff0c\u6709\u4e24\u4e2a\u70b9\u90fd\u662f\u539f\u70b9\uff0c\u90a3\u4e48\u8fd9\u4e09\u70b9\u80af\u5b9a\u662f\u5171\u7ebf\u7684\uff0c\u4f46\u8fd9\u4e24\u4e2a\u539f\u70b9\u7684\u659c\u7387\uff0c\u5374\u53ef\u4ee5\u4e3a\u4efb\u610f\u503c\u3002<\/p>\n

\u6211\u4eec\u6ce8\u610f\u5230\uff0c\u5f88\u591a\u8fb9\u754c\u6761\u4ef6\u662f\u7531\u5750\u6807\u7cfb\u5e26\u6765\u7684\u3002\u56e0\u6b64\uff0c\u5982\u679c\u6211\u4eec\u9009\u62e9\u8ba1\u7b97\u4e09\u4e2a\u70b9\u4e24\u4e24\u4e4b\u95f4\u7684\u8ddd\u79bb\uff0c\u5e76\u4e14\u6bd4\u8f83\u77ed\u8fb9\u957f\u5ea6\u4e4b\u548c\u4e0e\u957f\u8fb9\u957f\u5ea6\u3002\u6211\u4eec\u53ef\u4ee5\u7ed5\u8fc7\u5f88\u591a\u6ce5\u6cbc\uff0c\u4ee3\u7801\u4e5f\u56e0\u6b64\u53d8\u5f97\u7b80\u6d01\u3002<\/p>\n

\u7136\u800c\uff0c\u8fd9\u6837\u505a\u4f9d\u7136\u5b58\u5728\u4e00\u4e2a\u56fa\u6709\u7684\u95ee\u9898—\u6709\u7406\u6570\u7684\u70b9\u4e4b\u95f4\uff0c\u53ef\u4ee5\u6709\u65e0\u7406\u6570\u7684\u8ddd\u79bb\u3002\u8fd9\u5f53\u7136\u662f\u8ba1\u7b97\u8ddd\u79bb\u65f6\uff0c\u5f00\u6839\u53f7\u7ed9\u95f9\u7684\u3002\u65e0\u7406\u6570\u8ddd\u79bb\u7684\u95ee\u9898\u5728\u4e8e\uff0c\u8fd9\u79cd\u7cbe\u5ea6\u95ee\u9898\uff0c\u5e76\u4e0d\u662f\u7531\u95ee\u9898\u7684\u8f93\u5165\u5e26\u6765\uff0c\u800c\u662f\u7531\u4e2d\u95f4\u6b65\u9aa4\u4ea7\u751f\u7684\u3002<\/p>\n

Brian\u6700\u540e\u7ed9\u51faJonathan Shewchuk\u7684\u65b9\u6848\u662f\uff0c\u8ba1\u7b97\u4e09\u70b9\u6240\u6784\u6210\u4e09\u89d2\u5f62\u7684\u9762\u79ef\uff0c\u5e76\u4e0e0\u4f5c\u6bd4\u8f83\u3002<\/p>\n

\u8ba1\u7b97\u9762\u79ef\u6bd4\u8d77\u8ba1\u7b97\u8fb9\u957f\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u9762\u79ef\u53ef\u4ee5\u901a\u8fc7\u540c\u9876\u70b9\u4e24\u4e2a\u77e2\u91cf\u7684\u53c9\u4e58\u6765\u8ba1\u7b97(\u5982\u4e0b\u56fe\u6240\u793a)\u4ece\u800c\u907f\u514d\u4e86\u5f00\u6839\u53f7\u3002\u4e5f\u7531\u6b64\u628a\u7cbe\u5ea6\u95ee\u9898\uff0c\u9650\u5236\u4e8e\u8f93\u5165\u6570\u636e\u7684\u7cbe\u5ea6\u3002<\/p>\n

|x1-x3 y1-y3|
\n|x2-x3 y2-y3|<\/code><\/p>\n

\u6700\u7ec8\u4ee3\u7801\u5982\u4e0b(\u4e09\u4e2a\u70b9\u5206\u522b\u4e3ap, q, r)\uff1a<\/p>\n

(defun area-collinear (px py qx qy rx ry)
\n(= (* (- px rx) (- qy ry)) (* (- qx rx) (- py ry))))<\/code><\/p>\n

\u8fd9\u4e2a\u4f8b\u5b50\u867d\u7136\u6781\u5176\u7b80\u5355\uff0c\u4f46\u628a\u5b83\u7a0d\u7a0d\u4e00\u822c\u5316\uff0c\u5c31\u80fd\u53cd\u6620\u51fa\u5f88\u591a\u95ee\u9898\uff1a<\/p>\n

\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4f1a\u5199\u51fa\u7c7b\u4f3c\u4e8e\u8ba1\u7b97\u659c\u7387\u7684\u76f4\u89c9\u7b97\u6cd5\u3002\u66f4\u7cdf\u7cd5\u7684\u662f\uff0c\u6211\u4eec\u751a\u81f3\u53ef\u80fd\u6f0f\u6389\u659c\u7387\u4e0d\u5b58\u5728\uff0c\u6216\u8005\u659c\u7387\u4e3a\u4efb\u610f\u503c\u7684\u8fb9\u754c\u3002
\nDEV CC\u4e4b\u540e\uff0cQA\u4e00\u6d4b\uff0c\u53d1\u73b0\u4e86\u659c\u7387\u4e0d\u5b58\u5728\u7684\u95ee\u9898\uff0c\u4e8e\u662f\u4ee3\u7801\u91cc\u52a0\u4e0a\u4e00\u53e5if\u6761\u4ef6\u5206\u652f\uff0c\u6ce8\u91ca\u4e0abug\u53f7\u3002
\nBeta\u4e4b\u540e\uff0c\u7528\u6237complain\u5982\u6b64\u660e\u663e\u7684\uff0c\u539f\u70b9\u659c\u7387\u4e0d\u5b58\u5728\u7684bug\uff0c\u5927\u5bb6\u5f00\u4f1a\u8052\u566a\u4e00\u756a\uff0cDEV\u548cQA\u76f8\u4e92\u6307\u8d23\u4e00\u756a\uff0c\u4e8e\u662f\u4e4e\u53c8\u591a\u4e86\u4e00\u53e5if\u3002
\nZB\u4e4b\u540e\uff0c\u5927\u5bb6\u6000\u7740\u5fd0\u5fd1\u7684\u5fc3\u60c5RTM\uff0c\u6307\u671bCRT\u4e0d\u8981\u8fc7\u6765\u62b1\u6028\uff0c\u7528\u6237\u62a5\u4e86\u4e00\u5806bug\uff0c\u53c8\u5f97\u52a0\u73ed\u3002<\/p>\n

\u4e8e\u662f\u5728\u8d28\u91cf\u4fdd\u969c\u6307\u5f15\u4e0b\uff0c\u4ee3\u7801\u8ddd\u79bb\u7f8e\u4e3d\u7684\u6807\u51c6\u6e10\u884c\u6e10\u8fdc\u3002\u76f4\u5230\u67d0\u4e00\u5929\uff0cperformance\u771f\u6b63\u6210\u4e86\u95ee\u9898\u3002<\/p>\n

\u725b\u4eba\u5927\u7b14\u4e00\u6325\uff0c\u5347\u7ea7\u7b97\u6cd5\u4e3a\u8ba1\u7b97\u8fb9\u957f\uff0c\u66f4\u65b0\u4ea7\u54c1\u540d\u79f0\u4e3aXXX 2009(Engine Updated)\u3002
\n\u4e0d\u4e45\uff0c\u6311\u5254\u800c\u53c8\u65e0\u804a\u7684\u5ba2\u6237\u5f00\u59cb\u62b1\u6028\u7cbe\u5ea6\u95ee\u9898\uff0c\u5927\u5bb6\u8ba8\u8bba\u4e00\u756a\uff0c\u725b\u4eba\u51b3\u5b9aBy Design\u56de\u53bb\uff0c\u5e76\u4e14\u5728Readme\u91cc\u9762\u7684Known Issues\u91cc\u52a0\u4e0a\u4e00\u53e5\u8bf4\u660e\u3002
\n\u5f53\u65f6\u95f4\u6c89\u6dc0\u4e86\u8ba1\u7b97\u8fb9\u957f\u7684\u4ee3\u7801\uff0c\u8fd9\u6bb5\u4ee3\u7801\u4e5f\u5c31\u6210\u4e86\u4e0d\u673d\u7684\u4e30\u7891\u548c\u725b\u4eba\u6d25\u6d25\u4e50\u9053\u7684\u8c08\u8d44\u3002<\/p>\n

\u8fd9\u65f6\u5019\uff0c\u504f\u6709\u4e0d\u5591\u4e16\u4e8b\u7684\u5c0f\u5c41\u5b69\u8bf4\uff0c\u4e3a\u4ec0\u4e48\u6211\u4eec\u4e0d\u8ba1\u7b97\u9762\u79ef\u5462\uff1f
\n\u725b\u4eba\u8bf4\uff0c\u6211\u5478…\u54ea\u51c9\u5feb\u54ea\u5f85\u7740\u53bb…<\/p>\n

\u725b\u4eba\u5c31\u662f\u725b\u4eba\uff0c\u5c0f\u5c41\u5b69\u6682\u65f6\u8fd8\u4e0d\u660e\u767d\u4e00\u4e2a\u9053\u7406\u3002\u5982\u679c\u4f60\u5199\u4e86\u8ba1\u7b97\u9762\u79ef\u7684\u4ee3\u7801\uff0c\u4f60\u5c31\u4f5c\u51fa\u4e86\u4e00\u4e2a\u5047\u5b9a—\u4eba\u4eec\u90fd\u77e5\u9053\u7528\u53c9\u4e58\u6765\u8ba1\u7b97\u9762\u79ef\u3002
\n\u5c0f\u5c41\u5b69\u4ee5\u4e3a\u81ea\u5df1\u7684\u957f\u7bc7\u6ce8\u91ca\uff0c\u80fd\u591f\u628a\u95ee\u9898\u8bf4\u6e05\u695a\u3002\u7136\u800c\uff0c\u5fd9\u788c\u7684\u4eba\u4eec\u8c01\u4f1a\u60f3\u542c\u4f60\u4e00\u4e2a\u5c0f\u5c41\u5b69\u7684\u6559\u5bfc\u3002
\n\u8fd9\u65f6\u5019\uff0c\u5c0f\u5c41\u5b69\u4e0d\u5f97\u4e0d\u611f\u53f9\u601d\u79d1\u7535\u8bdd\u8bbe\u8ba1\u7684\u5b8c\u7f8e\uff0c\u5373\u4f7f\u4f60\u628a\u542c\u7b52\u62ff\u8d77\u6765\uff0c\u4f9d\u7136\u80fd\u6709\u4eba\u6253\u7206\u5c0f\u5c41\u5b69\u7684\u7535\u8bdd\uff0c\u8981\u4ed6\u4eb2\u81ea\uff0c\u4e00\u904d\u53c8\u4e00\u904d\u7684\u89e3\u91ca\u3002<\/p>\n

\u4e16\u754c\u7684\u5b8c\u7f8e\uff0c\u5f80\u5f80\u5c31\u4f53\u73b0\u5728\u5bf9\u4e8e\u5b8c\u7f8e\u7684\u6c42\u4e0d\u5f97\u4e0e\u4e0d\u53ef\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

<Beautiful Code>\u4e00\u4e66\u4e0d\u7b97\u8584\uff0c\u91cc\u9762\u768438\u4f4d\u4f5c\u8005\uff0c\u4e5f\u7b97\u5f97\u4e0a\u4e2a\u9876\u4e2a\u7684\u725b\u3002\u4f46\u603b\u7684\u6765\u8bf4\uff0c\u4fe1\u606f … \u7ee7\u7eed\u9605\u8bfb\u201cBeautiful Code\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-526","post","type-post","status-publish","format-standard","hentry","category-tech"],"_links":{"self":[{"href":"https:\/\/blog.axqd.net\/index.php?rest_route=\/wp\/v2\/posts\/526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.axqd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.axqd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.axqd.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.axqd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=526"}],"version-history":[{"count":0,"href":"https:\/\/blog.axqd.net\/index.php?rest_route=\/wp\/v2\/posts\/526\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.axqd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.axqd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.axqd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}