
\u6700\u8fd1\u5c1d\u8bd5\u5728 Clojure \u4e2d\u4f7f\u7528 Akka \uff0c\u627e\u4e86\u4e00\u5708\u53d1\u73b0\u5e76\u6ca1\u6709\u6301\u7eed\u66f4\u65b0\u7684\u9488\u5bf9\u5b83\u7684 wrapper. \u4e8e\u662f\u51c6\u5907\u5c01\u88c5\u8fb9\u4f7f\u7528\u8fb9\u5c01\u88c5\u4e00\u4e2a\u3002\u8bd5\u7740\u91cd\u5199\u6765\u81ea\u5b98\u7f51\u7684\u793a\u4f8b\u65f6\uff0c\u4f3c\u4e4e\u627e\u5230\u4e86\u6ca1\u6709\u8f83\u65b0\u7684\u73b0\u6210\u5c01\u88c5\u7684\u539f\u56e0\uff1aAkka \u672c\u8eab\u63d0\u4f9b\u7684\u63a5\u53e3\u6bd4\u8f83\u7b80\u6d01\uff0c\u4e14 Clojure \u4e0e Java \u7684\u4e92\u64cd\u4f5c\u6781\u4e3a\u6d41\u7545\uff0c\u76f4\u63a5\u4f7f\u7528\u5373\u53ef\u3002
\n\u76ee\u524d\u8fd9\u4e9b\u793a\u4f8b\u7684\u4ee3\u7801\u653e\u5728\u4ed3\u5e93 https://github.com/lotuc/akka-clojure. \u5bf9\u4e8e Akka \u539f\u59cb\u63a5\u53e3\u7684\u6d45\u5c01\u88c5\u653e\u5728 lotuc.akka \u540d\u5b57\u7a7a\u95f4\u4e0b\uff0c\u4e2a\u4eba\u4f7f\u7528\u7684\u4e00\u4e9b\u5c01\u88c5\u653e\u5728 lotuc.akka-clojure \u540d\u5b57\u7a7a\u95f4\u4e0b\u3002\u611f\u5174\u8da3\u7684\u53ef\u4ee5\u53bb\u5c1d\u8bd5\u4e00\u4e0b\uff0c\u5373\u4fbf\u4e0d\u4f5c\u4e3a\u5de5\u4f5c\u8bed\u8a00\uff0cClojure REPL \u7528\u4e8e\u5c1d\u8bd5 JVM \u7684\u5e93\u4e5f\u662f\u4e00\u6d41\u7684\u5de5\u5177\u3002
\u5e73\u65f6\u770b v2 \u6bd4\u8f83\u591a\uff0c\u53bb Clojure China \u770b\u4e86\u773c\u611f\u89c9\u6709\u70b9\u51b7\u6e05\uff0c\u6709\u6ca1\u6709\u6d3b\u8dc3\u4e00\u70b9\u7684\u5462
\u6700\u8fd1\u4e0d\u77e5\u9053\u4e3a\u4ec0\u4e48\uff0c\u5927\u5bb6\u597d\u50cf\u5bf9\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5174\u8da3\u53c8\u8d77\u6765\u4e86\uff0c\u524d\u9635\u5b50\u540c\u4e8b\u5728\u77e5\u4e4e\u6709\u4e00\u4e2a\u6bd4\u8f83\u7cbe\u5f69\u7684\u56de\u7b54\uff0c\u8f6c\u5230\u8fd9\u91cc\u3002\u8bf4\u786c\u4e0d\u786c\uff0c\u4e86\u89e3\u4e00\u4e0b\u4e5f\u597d\uff0c\u548c Clojure \u7231\u597d\u8005\u5206\u4eab\u4e00\u4e0b\u4e5f\u597d\u3002
\n\nClojure \u80fd\u591f\u5438\u5f15\u4eba\u7684\u5f88\u91cd\u8981\u4e00\u70b9\u662f\u5b83\u662f JVM \u4e4b\u4e0a\u7684\u8bed\u8a00\uff0c\u8fd9\u4e2a\u51b3\u5b9a\u975e\u5e38\u5173\u952e\u3002
\n\n\u9996\u5148\uff0c\u56e0\u4e3a\u6839\u690d\u4e8e JVM \u4e4b\u4e0a\uff0c\u5e76\u4e14\u505a\u5230\u4e86\u8ddf Java \u8bed\u8a00\u7684\u76f8\u4e92\u8c03\u7528\uff0c\u5b83\u80fd\u5438\u5f15\u5f88\u591a\u6210\u719f\u7684 Java \u5f00\u53d1\u8005\u3002
\u5176\u6b21\uff0c\u5b83\u53ef\u4ee5\u4f7f\u7528 Java \u793e\u533a\u4e30\u5bcc\u7684\u5f00\u6e90\u8f6f\u4ef6\uff0c\u4e0d\u9700\u8981\u4ece\u5934\u53bb\u6784\u5efa\u4e00\u4e2a\u793e\u533a\uff0c\u4f60\u53ef\u4ee5\u770b\u5230\u5f88\u591a Clojure \u5f00\u6e90\u4ee3\u7801\u90fd\u662f\u7b80\u5355\u5730\u5305\u88c5 Java \u7684\u5f00\u6e90\u5305\uff0c\u4f46\u662f\u901a\u8fc7 Clojure \u9ad8\u5ea6\u62bd\u8c61\u7b80\u5355\u7684\u8bed\u6cd5\u63d0\u4f9b\u66f4\u4fbf\u5229\u7684\u4f7f\u7528\u7684\u65b9\u5f0f\uff1b\u2028
\u7b2c\u4e09\uff0c\u7531\u4e8e JVM \u5e73\u53f0\u672c\u8eab\u7684\u9ad8\u5ea6\u6210\u719f\u548c\u4f18\u5316\uff0cclojure \u7684\u7f16\u8bd1\u5668\u751f\u6210\u7684 byte code \u8ddf Java \u7f16\u8bd1\u5668\u751f\u6210\u7684 byte code \u5e76\u65e0\u4e8c\u81f4\uff08\u4e0d\u5b8c\u5168\u662f\uff09\uff0c\u5b83\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u4e5f\u80fd\u9a6c\u4e0a\u5f97\u5230\u4fdd\u8bc1\uff0c\u8fd9\u6bd4\u4ece\u5934\u6784\u5efa\u4e00\u4e2a\u65b0\u5e73\u53f0\u6210\u672c\u4f4e\u5f97\u591a\u3002
\u6784\u5efa\u4e8e JVM \u4e4b\u4e0a\uff0cClojure \u5c31\u662f\u4e00\u95e8\u4e25\u8083\u7684\u8bed\u8a00\uff0c\u800c\u975e\u5f88\u591a\u4eba\u773c\u4e2d\u7684 LISP\u5bb6\u65cf\u4e2d\u7684 \u73a9\u5177\u8bed\u8a00\uff0c\u4f60\u5b66\u4e60\u540e\u53ef\u4ee5\u9a6c\u4e0a\u4f7f\u7528\u5e76\u4e14\u5b9e\u8df5\u3002\u4f46\u662f Clojure \u53c8\u662f LISP \u65b9\u8a00\uff0cLISP \u7684\u795e\u5947\u80fd\u529b\u5b83\u8fd8\u90fd\u4fdd\u7559\uff0c\u8fd9\u6837\u517c\u5177\u7f8e\u5b66\u548c\u5b9e\u7528\u7684\u8bed\u8a00\u5982\u4f55\u8ba9\u4eba\u4e0d\u7231\uff1f\u6211\u76f8\u4fe1\u5f88\u591a\u719f\u6089 Scheme \u4e4b\u7c7b\u65b9\u8a00\u7684\u7ae5\u978b\uff0c\u5e76\u4e14\u6709 Java \u80cc\u666f\u7684\uff0c\u90fd\u4f1a\u5bf9 Clojure \u6709\u76f8\u89c1\u6068\u665a\u7684\u611f\u89c9\u3002
\n\nClojure \u7684\u8bbe\u8ba1\u539f\u5219\u53ef\u4ee5\u6982\u62ec\u6210 5 \u4e2a\u8bcd\u6c47\uff1a\u7b80\u5355\u3001\u4e13\u6ce8\u3001\u5b9e\u7528\u3001\u4e00\u81f4\u548c\u6e05\u6670\u3002\u8fd9\u4e0d\u662f\u6211\u6982\u62ec\u7684\uff0c\u800c\u662f\u300aThe joy of clojure\u300b\u6982\u62ec\u7684\u3002
\n\n\u4e13\u6ce8\uff1a\u524d\u7f00\u8fd0\u7b97\u7b26\u4e0d\u9700\u8981\u53bb\u8003\u8651\u4f18\u5148\u7ea7\uff0c\u4e5f\u6ca1\u6709\u4ec0\u4e48\u83f1\u5f62\u7ee7\u627f\u7684\u95ee\u9898\uff0c\u52a8\u6001\u7c7b\u578b\u7cfb\u7edf\uff08\u6709\u5229\u6709\u5f0a\uff09\uff0cREPL \u63d0\u4f9b\u7684\u63a2\u7d22\u5f0f\u7f16\u7a0b\u65b9\u6cd5\uff08\u544a\u522b\u4fee\u6539 / \u7f16\u8bd1 / \u8fd0\u884c\u7684\u6b7b\u5faa\u73af\uff0c\u6240\u89c1\u5373\u6240\u5f97\uff09\u3002
\u5b9e\u7528\uff1a\u524d\u9762\u63d0\u5230\uff0c\u6784\u5efa\u5728 JVM \u4e4b\u4e0a\uff0c\u8ddf Java \u8bed\u8a00\u7684\u4e92\u64cd\u4f5c\u975e\u5e38\u5bb9\u6613\u3002\u76f4\u63a5\u8c03\u7528 Java \u65b9\u6cd5\uff0c\u4e0d\u53bb\u53d1\u660e\u4e00\u5957\u65b0\u7684\u8c03\u7528\u8bed\u6cd5\uff0c\u52aa\u529b\u89c4\u907f Java \u8bed\u8a00\u4e2d\u7e41\u7410\u7684\u5730\u65b9 (doto, \u7bad\u5934\u5b8f\u7b49\u7b49\uff09\u3002
\u6e05\u6670\uff1a\u7eaf\u51fd\u6570\uff08\u524d\u9762\u63d0\u5230\uff09\uff0cimmutable var\uff0cimmutable \u6570\u636e\u7ed3\u6784\uff0cSTM \u907f\u514d\u9501\u95ee\u9898\u3002\u4e0d\u53ef\u53d8\u51cf\u5c11\u4e86\u5fc3\u667a\u7684\u8d1f\u62c5\uff0c\u964d\u4f4e\u4e86\u591a\u7ebf\u7a0b\u7f16\u7a0b\u7684\u96be\u5ea6\uff0c\u7eaf\u51fd\u6570\u4e5f\u66f4\u5229\u4e8e\u6d4b\u8bd5\u548c\u8c03\u8bd5\u3002
\u4e00\u81f4\uff1a\u8bed\u6cd5\u7684\u4e00\u81f4\u6027\uff1a\u4f8b\u5982 doseq \u548c for \u5b8f\u7c7b\u4f3c\uff0c\u90fd\u652f\u6301 destructring, \u652f\u6301\u76f8\u540c\u7684 guard \u8bed\u53e5\uff08when,while\uff09\u3002\u6570\u636e\u7ed3\u6784\u7684\u4e00\u81f4\u6027\uff1asequence \u62bd\u8c61\u4e4b\u4e0a\u7684\u5404\u79cd\u9ad8\u9636\u51fd\u6570\u3002
\u5177\u4f53\u5230 STM\uff0c\u6211\u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u4e2a\u7279\u6027\u5728\u65e5\u5e38\u7f16\u7a0b\u4e2d\uff0c\u5176\u5b9e\u4f60\u7528\u5230\u7684\u673a\u4f1a\u4e0d\u591a\u3002\u5728 web \u7f16\u7a0b\u91cc\uff0c\u4f60\u7684\u5e76\u53d1\u6a21\u578b Web Container \u5df2\u7ecf\u5e2e\u4f60\u5904\u7406\uff08tomcat,jetty\uff09\uff0c\u4e8b\u52a1\u4e5f\u662f\u6570\u636e\u5e93\u5e2e\u4f60\u5904\u7406\uff0c\u51e0\u4e4e\u627e\u4e0d\u5230\u573a\u5408\u53bb\u4f7f\u7528 STM\u3002\u8fd9\u4e2a\u7279\u6027\u5728\u505a\u4e00\u4e9b\u4e2d\u95f4\u4ef6\u6216\u8005\u5e95\u5c42 framework \u7684\u65f6\u5019\u624d\u53ef\u80fd\u7528\u5230\u3002\u8fd9\u4e2a\u7279\u6027\u7684\u8bbe\u8ba1\u4e0a\u9762\u5df2\u7ecf\u63d0\u5230\uff0c\u8ddf clojure \u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u7d27\u5bc6\u76f8\u5173\u7684\uff0c\u8ddf immutable \u6570\u636e\u7ed3\u6784\u4e5f\u662f\u5bc6\u4e0d\u53ef\u5206\uff0c\u540c\u65f6\u5b83\u4e5f\u4e0d\u662f\u6ca1\u6709\u4ee3\u4ef7\uff0c\u4e8b\u52a1\u5386\u53f2\u8bb0\u5f55\u548c\u6162\u4e8b\u52a1\u9891\u7e41\u56de\u6eda\u7684\u4ee3\u4ef7\uff0c\u6709\u65f6\u5019\u4f60\u8fd8\u662f\u9700\u8981\u9000\u56de\u53bb\u4f7f\u7528 Java \u90a3\u5957\u9501\u673a\u5236\uff0c\u5e86\u5e78\u7684\u662f Clojure \u4e0d\u963b\u6b62\u4f60\u53bb\u4f7f\u7528\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u7c7b\u4f3c locking \u8fd9\u6837\u7684\u5b8f\u6765\u65b9\u4fbf\u4f60\u4f7f\u7528\u3002
Clojure \u7684\u8bbe\u8ba1\u7f3a\u9677\u4e0d\u80fd\u8bf4\u662f\u7f3a\u9677\uff0c\u8fd9\u662f\u7531\u4e8e\u5b83\u8bbe\u8ba1\u7684\u76ee\u6807\u51b3\u5b9a\u7684\uff0c\u6709\u5f97\u5fc5\u6709\u5931\u3002
\n\n\u9996\u5148\u8fd8\u662f JVM\uff0c\u57fa\u4e8e JVM \u6709\u79cd\u79cd\u597d\u5904\uff0c\u4f46\u662f JVM \u7684\u542f\u52a8\u901f\u5ea6\u5b9e\u5728\u60b2\u5267\uff0c\u56e0\u6b64\u7528 Clojure \u5199\u4e00\u4e9b\u5c0f\u7684 script \u5904\u7406\u65e5\u5e38\u4e8b\u52a1\uff0c\u663e\u5f97\u8fd8\u662f\u4e0d\u591f\u5f97\u5fc3\u5e94\u624b\uff0c\u8fd9\u6837\u7684\u5de5\u4f5c\u6211\u8fd8\u662f\u7528 Ruby\uff0cPython \u7684\u811a\u672c\u8bed\u8a00\u6765\u641e\u5b9a\u66f4\u4fbf\u6377\u3002\u4e0d\u8fc7\u76ee\u524d Clojure \u6709\u4e00\u4e9b\u5176\u4ed6\u8bed\u8a00\u4e4b\u4e0a\u7684\u5b9e\u73b0\uff0c\u6bd4\u5982 clojure-py\u3001joxa\u3001clojureclr \u8fd9\u4e9b\u5b9e\u73b0\u5e94\u8be5\u4f1a\u6bd4 JVM \u7684\u542f\u52a8\u5feb\u5f88\u591a\uff08\u62b1\u6b49\uff0c\u6211\u6ca1\u6d4b\u8bd5\u8fc7\uff09\u3002
\u4e0d\u4ec5\u5982\u6b64\uff0c\u56e0\u4e3a Clojure \u8ddf JVM \u5e73\u53f0\u7684\u7ed1\u5b9a\u5982\u6b64\u4e4b\u6df1\uff0c\u5e76\u4e14\u4e3a\u4e86\u771f\u6b63\u53d1\u6325 Clojure \u7684\u5a01\u529b\uff0c\u4f60\u8fd8\u9700\u8981\u53bb\u719f\u6089 Java \u5e73\u53f0\u7684\u4e1c\u897f\uff0c\u719f\u6089 Java \u8bed\u8a00\u3001\u7c7b\u5e93\u3001\u5185\u5b58\u6a21\u578b\u3001GC \u4f18\u5316\u3001\u591a\u7ebf\u7a0b\u548c\u7f51\u7edc\u7f16\u7a0b\u3001\u5f00\u6e90\u7c7b\u5e93\u7b49\u7b49\u3002\u53ef\u4ee5\u8fd9\u6837\u8ba4\u4e3a\uff1a\u60f3\u6210\u4e3a\u4e00\u4e2a\u597d\u7684 Clojure \u7a0b\u5e8f\u5458\uff0c\u9996\u5148\u9700\u8981\u662f\u4e00\u540d\u597d\u7684 Java \u7a0b\u5e8f\u5458\u3002\u8fd9\u4e5f\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u963b\u788d\u4e86 Clojure \u7684\u63a8\u5e7f\uff0c\u63d0\u9ad8\u4e86\u5b66\u4e60\u6210\u672c\u3002
\u5176\u6b21\uff0cClojure \u7684 API \u8bbe\u8ba1\u4e0a\uff0c\u6709\u65f6\u5019\u4e0d\u7b26\u5408\u4f60\u7684\u76f4\u89c9\uff0c\u800c\u662f\u7b26\u5408 Clojure \u7684\u54f2\u5b66\uff0c\u6bd4\u5982 contains?\u51fd\u6570\u5bf9 vector \u7b49\u6570\u7ec4\u578b\u96c6\u5408\u7684\u8c03\u7528\u4e0a\u3002\u5173\u4e8e\u8fd9\u4e00\u70b9\uff0cRich \u7684\u56de\u7b54\u662fElegance and familiarity are orthogonal.\uff0c\u4e5f\u5c31\u662f\u4f18\u96c5\u548c\u719f\u6089\u662f\u6b63\u4ea4\u5173\u7cfb\u7684\u3002\u4fdd\u6301 API \u5185\u5728\u7684\u4e00\u81f4\u6027\uff0c\u6bd4\u76f4\u89c9\u7684\u719f\u6089\u66f4\u91cd\u8981\uff0c\u8fd9\u662f\u66f4\u6df1\u5165\u601d\u8003\u3001\u7406\u6027\u7684\u76f4\u89c9\u3002
\u7b2c\u4e09\uff0c\u5f31\u7c7b\u578b\u7684\u597d\u5904\u8db3\u591f\u591a\uff0c\u7075\u6d3b\uff0c\u51cf\u5c11\u58f0\u660e\u4ee3\u7801\uff0c\u9002\u5408\u63a2\u7d22\u5f0f\u7f16\u7a0b\uff1b\u540c\u6837\uff0c\u574f\u5904\u4e5f\u4e0d\u662f\u6ca1\u6709\uff0c\u6ca1\u6709\u7c7b\u578b\u4fdd\u969c\uff0c\u9519\u8bef\u53ef\u80fd\u8981\u7b49\u5230\u8fd0\u884c\u65f6\u624d\u80fd\u53d1\u73b0\uff0c\u9759\u6001\u4ee3\u7801\u68c0\u67e5\u5de5\u5177\u4e5f\u6ca1\u6709\u529e\u6cd5\u5e2e\u4f60\u53d1\u73b0\uff0c\u8fd9\u5c31\u9700\u8981\u4f60\u4e00\u5b9a\u7a0b\u5ea6\u7684\u6d4b\u8bd5\u4ee3\u7801\u6765\u4fdd\u8bc1\u8fd0\u884c\u65f6\u884c\u4e3a\u3002
\u7b2c\u56db\uff0c\u6027\u80fd\u4e0a\uff0c\u867d\u7136 clojure \u751f\u6210\u7684\u5b57\u8282\u7801\u5df2\u7ecf\u5f88\u9ad8\u6548\uff0c\u4e5f\u6709 type hint \u8fd9\u6837\u7684\u6280\u672f\u6765\u5e2e\u52a9\u63d0\u5347\u6027\u80fd\uff0c\u4f46\u662f\u4f1a\u6709\u4e0d\u5c11\u7684\u8f6c\u578b (checkcast)\u3001\u88c5\u7bb1\u548c\u62c6\u7bb1\uff08boxing and unboxing\uff09\u4ee5\u53ca\u7c7b\u578b\u5224\u65ad\u5206\u652f\u8df3\u8f6c\u7684\u591a\u4f59\u6307\u4ee4\uff0c\u8fd9\u5728\u4e00\u4e9b\u6027\u80fd\u654f\u611f\u7684\u5e94\u7528\u91cc\u53ef\u80fd\u4f1a\u66b4\u9732\u51fa\u6765\u3002\u5c3d\u7ba1\u6211\u8ba4\u4e3a\u5927\u591a\u6570\u7f51\u7ad9\u578b\u7684\u5e94\u7528\u74f6\u9888\u90fd\u4f1a\u843d\u5728 IO \u4e0a\u3002
\u603b\u4e4b\uff0c Clojure \u662f\u4e00\u95e8\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u3001\u5b8c\u5168\u878d\u5165\u4f5c\u8005\u5bf9\u7f16\u7a0b\u7684\u601d\u8003\u7684\u3001\u5bcc\u6709\u751f\u4ea7\u529b\u7684\u73b0\u4ee3\u7f16\u7a0b\u8bed\u8a00\uff0c\u503c\u5f97\u6bcf\u4e2a\u5bf9\u751f\u4ea7\u6548\u7387\u3001\u51fd\u6570\u5f0f\u7f16\u7a0b\u3001\u5e76\u53d1\u7f16\u7a0b\u6709\u5174\u8da3\u7684\u670b\u53cb\u6df1\u5165\u4e86\u89e3\u4e0b\u3002
\n\n\u4f5c\u8005\uff1aDennis Zhuang LeanCloud Tech Leader
\n\n\u5907\u6ce8\uff1aLeanCloud \u91c7\u7528\u4e86\u591a\u79cd\u8bed\u8a00\u6df7\u5408\u6765\u6784\u5efa\u6574\u4e2a\u540e\u7aef\u7cfb\u7edf\uff0c\u5305\u62ec Clojure\u3001Java\u3001Node.js\u3001Scala \u7b49\u3002\u5176\u4e2d Clojure \u6784\u5efa\u4e86\u6574\u4e2a\u7f51\u7ad9\u95e8\u6237\u3001\u5b58\u50a8\u5f00\u653e API\u3001\u63a8\u9001\u3001\u804a\u5929\u7b49\u6838\u5fc3\u670d\u52a1\uff0cNode.js\u6784\u5efa\u4e86\u4e91\u7aef\u4ee3\u7801\u670d\u52a1\uff08\u7c7b\u4f3c\u5e94\u7528\u4ee3\u7801\u6258\u7ba1\uff09\uff0c\u6211\u4eec\u8fd8\u4f7f\u7528 Scala \u7f16\u5199\u7684 Spark \u4efb\u52a1\u6765\u5904\u7406\u79bb\u7ebf\u6570\u636e\u5206\u6790\uff0c\u6b64\u5916\uff0c\u8fd8\u6709\u5927\u91cf\u7684\u7edf\u8ba1\u7c7b MapReduce \u4efb\u52a1\u4f7f\u7528 Java \u7f16\u5199\u5e76\u8fd0\u884c\u5728 Hadoop \u96c6\u7fa4\u4e0a\u3002\u4e0d\u540c\u670d\u52a1\u4e4b\u95f4\u4f7f\u7528 RESTful \u534f\u8bae\u3001RPC \u6846\u67b6\u6216\u8005\u961f\u5217\u8fdb\u884c\u901a\u4fe1\u3002
\n", "date_published": "2015-08-04T03:40:25+00:00", "title": "\u4e94\u5e74 Clojure \u4f7f\u7528\u8005\u6d45\u8c08 Clojure \u8bed\u8a00\u7684\u8bbe\u8ba1", "id": "t/210649" }, { "author": { "url": "member/heganj", "name": "heganj", "avatar": "https://cdn.v2ex.com/avatar/1961/d931/39205_large.png?m=1715403524" }, "url": "t/89457", "date_modified": "2013-11-15T14:18:04+00:00", "content_html": "http://www.indiegogo.com/projects/typed-clojure