{"id":204680,"date":"2025-05-29T09:47:03","date_gmt":"2025-05-29T01:47:03","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204680\/"},"modified":"2025-05-29T09:47:03","modified_gmt":"2025-05-29T01:47:03","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e9%80%92%e5%bd%92%e5%92%8c%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%e5%ae%9e%e7%8e%b0%e4%b8%8d%e5%90%ab-lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84-div_by_primes_under_","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204680\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u548c\u9ad8\u9636\u51fd\u6570\u5b9e\u73b0\u4e0d\u542b lambda \u8868\u8fbe\u5f0f\u7684 div_by_primes_under_no_lambda(n) \u51fd\u6570\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u548c\u9ad8\u9636\u51fd\u6570\u5b9e\u73b0\u4e0d\u542b lambda \u8868\u8fbe\u5f0f\u7684 div_by_primes_under_no_lambda(n) \u51fd\u6570\uff1f<\/h1>\n

\u54c8\u55bd\uff01\u4eca\u5929\u5fc3\u8840\u6765\u6f6e\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\uff0c\u60f3\u5fc5\u5927\u5bb6\u5e94\u8be5\u5bf9\u6587\u7ae0<\/span>\u90fd\u4e0d\u964c\u751f\u5427\uff0c\u90a3\u4e48\u9605\u8bfb\u672c\u6587\u5c31\u90fd\u4e0d\u4f1a\u5f88\u56f0\u96be\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\uff0c\u82e5\u662f\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u5343\u4e07\u522b\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u4f60\uff01<\/p>\n

<\/p>\n

python \u9ad8\u9636\u51fd\u6570<\/strong><\/p>\n

\u5728\u5b66\u4e60 python \u9ad8\u9636\u51fd\u6570\u65f6\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u9700\u8981\u6253\u7834\u5e38\u89c4\u601d\u8def\u7684\u7ec3\u4e60\u9898\u3002\u5176\u4e2d\uff0c\u4e00\u4e2a\u5178\u578b\u95ee\u9898\u662f\uff1a<\/p>\n

\u9898\u76ee\uff1a<\/strong><\/p>\n

\u5b9e\u73b0 div_by_primes_under_no_lambda(n) \u51fd\u6570\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u63a5\u6536\u53c2\u6570 x\uff0c\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u6307\u793a 2 \u81f3 n \u4e4b\u95f4\u7684\u4efb\u4f55\u6570\u662f\u5426\u53ef\u4ee5\u6574\u9664 x\u3002\u672a\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u3002<\/p>\n

\u89e3\u9898\u601d\u8def\uff1a<\/strong><\/p>\n

\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u91c7\u7528\u9012\u5f52\u548c\u9ad8\u9636\u51fd\u6570\u7684\u601d\u60f3\u3002\u9996\u5148\uff0c\u6211\u4eec\u4f7f\u7528\u5d4c\u5957\u51fd\u6570 checker\uff0c\u5b83\u7684\u76ee\u7684\u662f\u5224\u65ad\u7ed9\u5b9a\u7684\u6570\u5b57\u662f\u5426\u6ee1\u8db3\u6761\u4ef6\u3002\u7531\u4e8e\u6211\u4eec\u4f7f\u7528 checker \u4f5c\u4e3a\u5916\u5c42\u51fd\u6570\uff0c\u6211\u4eec\u9700\u8981\u5c06\u5176\u521d\u59cb\u5316\u4e3a\u4e00\u4e2a\u59cb\u7ec8\u8fd4\u56de false \u7684\u51fd\u6570\u3002<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u904d\u5386 2 \u5230 n \u4e4b\u95f4\u7684\u6570\u5b57\uff0c\u5bfb\u627e\u53ef\u4ee5\u6574\u9664 x \u7684\u7d20\u6570\u3002\u5982\u679c\u6211\u4eec\u627e\u5230\u4e00\u4e2a\u7d20\u6570\uff0c\u6211\u4eec\u66f4\u65b0 checker \u51fd\u6570\uff0c\u4f7f\u5176\u5728\u8f93\u5165 x \u65f6\u8fd4\u56de true\u3002<\/p>\n

\u4f46\u662f\uff0c\u8fd9\u91cc\u6709\u4e00\u4e2a\u4f18\u5316\u7a7a\u95f4\u3002\u5f53\u6211\u4eec\u627e\u5230\u4e00\u4e2a\u7d20\u56e0\u5b50\u65f6\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u518d\u68c0\u67e5\u66f4\u5927\u7684\u7d20\u56e0\u5b50\u662f\u5426\u4e5f\u53ef\u4ee5\u6574\u9664 x\u3002\u8fd9\u662f\u56e0\u4e3a\u5982\u679c x \u53ef\u4ee5\u88ab\u4e00\u4e2a\u5c0f\u7d20\u56e0\u5b50\u6574\u9664\uff0c\u90a3\u4e48\u5b83\u4e0d\u80fd\u88ab\u5927\u4e8e\u8be5\u7d20\u56e0\u5b50\u7684\u4efb\u4f55\u7d20\u56e0\u5b50\u6574\u9664\u3002<\/p>\n

\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u6539\u8fdb\u6211\u4eec\u7684\u5faa\u73af\uff1a<\/p>\n

i = 2\nwhile i <= n:\n    if not checker(i):\n        def outer(fn, i):\n            def inner(x):\n                return x % i == 0 else fn(x)\n\n            return inner\n\n        checker = outer(checker, i)\n    i = i + 1<\/pre>\n
\u5728\u7ecf\u8fc7\u8fd9\u4e9b\u4f18\u5316\u540e\uff0c\u6211\u4eec\u83b7\u5f97\u4e86\u6700\u7ec8\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n
def div_by_primes_under_no_lambda(n):\n\n    def checker(x):\n        return False\n\n    i = 2\n    while i <= n:\n        if not checker(i):\n            def outer(fn, i):\n                def inner(x):\n                    return x % i == 0 else fn(x)\n\n                return inner\n\n            checker = outer(checker, i)\n        i = i + 1\n    return checker<\/pre>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u548c\u9ad8\u9636\u51fd\u6570\u5b9e\u73b0\u4e0d\u542b lambda \u8868\u8fbe\u5f0f\u7684 div_by_primes_under_no_lambda(n) \u51fd\u6570\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u4f7f\u7528\u9012\u5f52\u548c\u9ad8\u9636\u51fd\u6570\u5b9e\u73b0\u4e0d\u542b ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204680","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204680"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204680\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}