{"id":1087,"date":"2025-05-22T14:35:27","date_gmt":"2025-05-22T06:35:27","guid":{"rendered":"https:\/\/www.hyy.net\/?p=1087"},"modified":"2025-05-22T14:35:27","modified_gmt":"2025-05-22T06:35:27","slug":"csharp-lambda","status":"publish","type":"post","link":"https:\/\/diji.net\/?p=1087","title":{"rendered":"C#\u4e2d\u7684Lambda\u8868\u8fbe\u5f0f"},"content":{"rendered":"

\u4ec0\u4e48\u662fLambda\uff1f<\/p>\n

\u5728C#\u4e2d\uff0c\u4e00\u4e2aLambda\u8868\u8fbe\u5f0f\u5c31\u662f\u4e00\u4e2a\u533f\u540d\u51fd\u6570\u3002<\/p>\n

Lambda\u7684\u8bed\u6cd5\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

(Input Params) => Expression<\/code><\/pre>\n
\u2022  \u4e2d\u95f4\u7684"=>" \u662fLambda\u7684\u64cd\u4f5c\u7b26\uff0c\u4e00\u822c\u8bfb\u4f5c"goes to"<\/p>\n
\u2022  \u5de6\u8fb9\u7684\u90e8\u5206"Input Params"\u662fLambda\u8868\u8fbe\u5f0f\u7684\u8f93\u5165\u53c2\u6570\uff0c\u5f53\u4e14\u4ec5\u5f53\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u65f6\u5019\uff0c\u62ec\u53f7\u53ef\u4ee5\u5ffd\u7565\uff0c\u5176\u4ed6\u60c5\u51b5\u54ea\u6015\u53c2\u6570\u4e2a\u6570\u662f0\u4e2a\uff0c\u4e5f\u4e0d\u80fd\u5ffd\u7565.<\/p>\n
\u2022  \u53f3\u8fb9\u7684\u90e8\u5206"Expression"\u662f\u8bed\u53e5(Expression)\u6216\u8005\u4ee3\u7801\u5757(Statement)\uff0c\u5f53\u4e14\u4ec5\u5f53\u53ea\u6709\u4e00\u884c\u4ee3\u7801\u65f6\uff0c\u5927\u62ec\u53f7\u53ef\u4ee5\u5ffd\u7565\uff0c\u5176\u4ed6\u60c5\u51b5\u5747\u4e0d\u53ef\u5ffd\u7565\uff0c\u53c2\u8003\u4ee5\u4e0b\u6837\u4f8b\uff1a<\/p>\n
\u53c2\u8003\u4ee5\u4e0b\u6837\u4f8b\uff1a<\/p>\n
() => Console.WriteLine("No Params")  \/\/ 0 \u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u4e0d\u80fd\u7701\u7565\nx => x * x   \/\/ 1\u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u53ef\u52a0\u53ef\u4e0d\u52a0\n(x, y) => x - y     \/\/ 2\u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u4e0d\u80fd\u7701\u7565\n(x, y) => { x += y; Console.WriteLine(x); }   \/\/ \u5927\u62ec\u53f7\u4e0d\u80fd\u7701\u7565<\/code><\/pre>\n
\u963f\u9686\u4f50\u00b7\u90b1\u5947\uff08Alonzo Church\uff09\uff0c\u7f8e\u56fd\u6570\u5b66\u5bb6\u548c\u903b\u8f91\u5b66\u5bb6\uff0c\u5bf9\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\u505a\u51fa\u4e86\u91cd\u8981\u8d21\u732e\u3002\u90b1\u5947\u572820\u4e16\u7eaa30\u5e74\u4ee3\u63d0\u51fa\u4e86lambda\u6f14\u7b97\uff0c\u8fd9\u662f\u4e00\u79cd\u5f62\u5f0f\u5316\u7684\u8ba1\u7b97\u7406\u8bba\uff0c\u7528\u4e8e\u7814\u7a76\u51fd\u6570\u7684\u5b9a\u4e49\u3001\u5e94\u7528\u548c\u7b49\u4ef7\u6027\u3002\u4ed6\u5728\u63d0\u51falambda\u6f14\u7b97\u65f6\uff0c\u5b9a\u4e49\u4e86\u4e00\u79cd\u533f\u540d\u51fd\u6570\u7684\u8868\u8fbe\u65b9\u5f0f\uff0c\u5373lambda\u8868\u8fbe\u5f0f\u3002\u8fd9\u79cd\u8868\u8fbe\u65b9\u5f0f\u5141\u8bb8\u51fd\u6570\u6ca1\u6709\u540d\u5b57\uff0c\u76f4\u63a5\u901a\u8fc7\u53c2\u6570\u548c\u8868\u8fbe\u5f0f\u6765\u63cf\u8ff0\uff0c\u56e0\u6b64\u5f97\u540dlambda\u8868\u8fbe\u5f0f\u3002\u90b1\u5947\u7684\u8fd9\u4e00\u8d21\u732e\u4e3a\u540e\u6765\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u8a00\u5960\u5b9a\u4e86\u57fa\u7840\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ec0\u4e48\u662fLambda\uff1f \u5728C#\u4e2d\uff0c\u4e00\u4e2aLambda\u8868\u8fbe\u5f0f\u5c31\u662f\u4e00\u4e2a\u533f\u540d\u51fd\u6570\u3002 Lambda\u7684\u8bed\u6cd5\u7ed3\u6784\u5982\u4e0b\uff1a (Input Params) => Expression \u2022 \u4e2d\u95f4\u7684"=>" \u662fLambda\u7684\u64cd\u4f5c\u7b26\uff0c\u4e00\u822c\u8bfb\u4f5c"goes to" \u2022 \u5de6\u8fb9\u7684\u90e8\u5206"Input Params"\u662fLambda\u8868\u8fbe\u5f0f\u7684\u8f93\u5165\u53c2\u6570\uff0c\u5f53\u4e14\u4ec5\u5f53\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u65f6\u5019\uff0c\u62ec\u53f7\u53ef\u4ee5\u5ffd\u7565\uff0c\u5176\u4ed6\u60c5\u51b5\u54ea\u6015\u53c2\u6570\u4e2a\u6570\u662f0\u4e2a\uff0c\u4e5f\u4e0d\u80fd\u5ffd\u7565. \u2022 \u53f3\u8fb9\u7684\u90e8\u5206"Expression"\u662f\u8bed\u53e5(Expression)\u6216\u8005\u4ee3\u7801\u5757(Statement)\uff0c\u5f53\u4e14\u4ec5\u5f53\u53ea\u6709\u4e00\u884c\u4ee3\u7801\u65f6\uff0c\u5927\u62ec\u53f7\u53ef\u4ee5\u5ffd\u7565\uff0c\u5176\u4ed6\u60c5\u51b5\u5747\u4e0d\u53ef\u5ffd\u7565\uff0c\u53c2\u8003\u4ee5\u4e0b\u6837\u4f8b\uff1a \u53c2\u8003\u4ee5\u4e0b\u6837\u4f8b\uff1a () => Console.WriteLine("No Params") \/\/ 0 \u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u4e0d\u80fd\u7701\u7565 x => x * x \/\/ 1\u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u53ef\u52a0\u53ef\u4e0d\u52a0 (x, y) => x – y \/\/ 2\u4e2a\u53c2\u6570\uff0c\u5de6\u8fb9\u7684\u5706\u62ec\u53f7\u4e0d\u80fd\u7701\u7565 (x, y) => { x += y; Console.WriteLine(x); } \/\/ \u5927\u62ec\u53f7\u4e0d\u80fd\u7701\u7565 \u963f\u9686\u4f50\u00b7\u90b1\u5947\uff08Alonzo Church\uff09\uff0c\u7f8e\u56fd\u6570\u5b66\u5bb6\u548c\u903b\u8f91\u5b66\u5bb6\uff0c\u5bf9\u8ba1\u7b97\u673a\u79d1\u5b66\u9886\u57df\u505a\u51fa\u4e86\u91cd\u8981\u8d21\u732e\u3002\u90b1\u5947\u572820\u4e16\u7eaa30\u5e74\u4ee3\u63d0\u51fa\u4e86lambda\u6f14\u7b97\uff0c\u8fd9\u662f\u4e00\u79cd\u5f62\u5f0f\u5316\u7684\u8ba1\u7b97\u7406\u8bba\uff0c\u7528\u4e8e\u7814\u7a76\u51fd\u6570\u7684\u5b9a\u4e49\u3001\u5e94\u7528\u548c\u7b49\u4ef7\u6027\u3002\u4ed6\u5728\u63d0\u51falambda\u6f14\u7b97\u65f6\uff0c\u5b9a\u4e49\u4e86\u4e00\u79cd\u533f\u540d\u51fd\u6570\u7684\u8868\u8fbe\u65b9\u5f0f\uff0c\u5373lambda\u8868\u8fbe\u5f0f\u3002\u8fd9\u79cd\u8868\u8fbe\u65b9\u5f0f\u5141\u8bb8\u51fd\u6570\u6ca1\u6709\u540d\u5b57\uff0c\u76f4\u63a5\u901a\u8fc7\u53c2\u6570\u548c\u8868\u8fbe\u5f0f\u6765\u63cf\u8ff0\uff0c\u56e0\u6b64\u5f97\u540dlambda\u8868\u8fbe\u5f0f\u3002\u90b1\u5947\u7684\u8fd9\u4e00\u8d21\u732e\u4e3a\u540e\u6765\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bed\u8a00\u5960\u5b9a\u4e86\u57fa\u7840\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1087","post","type-post","status-publish","format-standard","hentry","category-csharp"],"_links":{"self":[{"href":"https:\/\/diji.net\/index.php?rest_route=\/wp\/v2\/posts\/1087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diji.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diji.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diji.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diji.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1087"}],"version-history":[{"count":0,"href":"https:\/\/diji.net\/index.php?rest_route=\/wp\/v2\/posts\/1087\/revisions"}],"wp:attachment":[{"href":"https:\/\/diji.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diji.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diji.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}