{"id":328,"date":"2020-01-04T01:30:01","date_gmt":"2020-01-03T17:30:01","guid":{"rendered":"http:\/\/www.mimiq.com.cn\/?p=328"},"modified":"2020-09-10T08:53:13","modified_gmt":"2020-09-10T00:53:13","slug":"%e4%ba%8c%e3%80%81deepops%e7%9a%84%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e5%b0%8f%e7%ac%94%e8%ae%b0-day1-iterator%e8%bf%ad%e4%bb%a3%e5%99%a8","status":"publish","type":"post","link":"http:\/\/www.mimiq.com.cn\/?p=328","title":{"rendered":"\u4e8c\u3001DeepOps\u7684\u8bbe\u8ba1\u6a21\u5f0f\u5c0f\u7b14\u8bb0-DAY1-Iterator\u8fed\u4ee3\u5668"},"content":{"rendered":"\n<p>\u4eca\u5929\u8981\u6765\u5b66\u4e60\u8fed\u4ee3\u5668\u6a21\u5f0f, \u731b\u5730\u4e00\u770b\u771f\u7684\u6ca1\u4ec0\u4e48\u5185\u5bb9. \u4f46\u662f\u7ffb\u5f00\u4e66(\u8bbe\u8ba1\u6a21\u5f0f)\u4e4b\u540e, <strong>\u53d1\u73b0\u4e8b\u60c5\u6ca1\u6709\u90a3\u4e48\u7b80\u5355!<\/strong><\/p>\n\n\n\n<h2>1 \u4e3b\u8981\u610f\u56fe<\/h2>\n\n\n\n<p>\u8fed\u4ee3\u5668\u6a21\u5f0f\u4e3b\u8981\uff1a<strong>\u63d0\u4f9b\u4e00\u79cd\u65b9\u6cd5\u987a\u5e8f\u8bbf\u95ee\u4e00\u4e2a\u805a\u5408\u5bf9\u8c61\u4e2d\u7684\u5404\u4e2a\u5143\u7d20\uff0c\u800c\u53c8\u4e0d\u9700\u8981\u66b4\u9732\u8be5\u5bf9\u8c61\u7684\u5185\u90e8\u8868\u793a\u3002<\/strong><\/p>\n\n\n\n<h2>2 \u7ec4\u6210<\/h2>\n\n\n\n<h4>2.1 \u63a5\u53e3 <\/h4>\n\n\n\n<ul><li>Iterator (\u8fed\u4ee3\u5668) : \u5b9a\u4e49\u8bbf\u95ee\u548c\u904d\u5386\u5143\u7d20\u7684\u63a5\u53e3\u3002<\/li><li>Aggregate (\u805a\u5408) : \u5b9a\u4e49\u521b\u5efa\u76f8\u5e94\u8fed\u4ee3\u5668\u5bf9\u8c61\u7684\u63a5\u53e3\u3002<\/li><\/ul>\n\n\n\n<h4>2.2 \u5b9e\u73b0<\/h4>\n\n\n\n<ul><li>ConcreteIterator\uff08\u5177\u4f53\u8fed\u4ee3\u5668\uff09\uff1a\u5b9e\u73b0\u8fed\u4ee3\u5668\u63a5\u53e3 \uff1b\u5bf9\u805a\u5408\u904d\u5386\u65f6\u8ddf\u8e2a\u5f53\u524d\u4f4d\u7f6e\u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u7684 BookShelfIterator \u3002<\/li><li>ConcreteAggregate\uff08\u5177\u4f53\u805a\u5408\uff09\uff1a\u5b9e\u73b0\u521b\u5efa\u76f8\u5e94\u8fed\u4ee3\u5668\u7684\u63a5\u53e3 \uff1b\u8be5\u64cd\u4f5c\u8fd4\u56deConcreteIterator\u7684\u4e00\u4e2a\u9002\u5f53\u5b9e\u4f8b \u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u7684 BookShelf \u3002<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"866\" height=\"459\" src=\"http:\/\/www.mimiq.com.cn\/wp-content\/uploads\/2020\/01\/ClassDiagram1.png\" alt=\"\" class=\"wp-image-340\"\/><\/figure>\n\n\n\n<h2>3 \u8fed\u4ee3\u5668\u6a21\u5f0f\u7684\u4e09\u4e2a\u91cd\u8981\u4f5c\u7528<\/h2>\n\n\n\n<ul><li>\u652f\u6301\u4e0d\u540c\u65b9\u5f0f\u904d\u5386\u4e00\u4e2a\u805a\u5408<\/li><li>\u7b80\u5316\u4e86\u805a\u5408\u7684\u63a5\u53e3<\/li><li>\u5728\u540c\u4e00\u4e2a\u805a\u5408\u4e0a\u53ef\u4ee5\u6709\u591a\u4e2a\u904d\u5386<\/li><\/ul>\n\n\n\n<h2>4 \u5b9e\u73b0<\/h2>\n\n\n\n<h3>4.1 \u8c01\u6765\u63a7\u5236\u8be5\u8fed\u4ee3<\/h3>\n\n\n\n<p> &#8221; <strong>\u662f\u5426\u7531\u4f7f\u7528\u8005\u63a7\u5236\u8fed\u4ee3<\/strong> ? &#8221; \uff0c\u4f5c\u4e3a &#8221; <strong>\u5916\u90e8\u8fed\u4ee3\u5668<\/strong> &#8221; \u548c &#8221; <strong>\u5185\u90e8\u8fed\u4ee3\u5668<\/strong> &#8220;\u7684\u533a\u5206\u4f9d\u636e\u3002<strong>\u5916\u90e8\u8fed\u4ee3\u5668<\/strong>\uff1a\u5fc5\u987b\u7531\u4f7f\u7528\u8005\u4e3b\u52a8\u63a8\u8fdb\u4fbf\u5229\u7684\u4e0d\u53d1\uff0c\u73b0\u5b9e\u7684\u5411\u8fed\u4ee3\u5668\u8bf7\u6c42\u4e0b\u4e00\u5143\u7d20\u3002\u800c<strong>\u5185\u90e8\u8fed\u4ee3\u5668<\/strong>\uff1a\u5219\u53ea\u9700\u8981\u60f3\u8d77\u63d0\u4ea4\u4e00\u4e2a\u5f85\u6267\u884c\u64cd\u4f5c\uff0c\u8fed\u4ee3\u5668\u5c06\u4f1a\u5bf9\u805a\u5408\u5185\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u5e94\u7528\u8be5\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3>4.2 \u8c01\u5b9a\u4e49\u904d\u5386\u7b97\u6cd5<\/h3>\n\n\n\n<p><strong>\u8fed\u4ee3\u5668 <\/strong>\u548c <strong>\u805a\u5408 <\/strong>\u672c\u8eab\u7684\u90fd\u53ef\u4ee5\u5b9a\u4e49\u904d\u5386\u7b97\u6cd5\u3002<\/p>\n\n\n\n<p> <strong>\u805a\u5408 <\/strong> \u4e2d \u5b9a\u4e49\u904d\u5386\u7b97\u6cd5 \uff1a\u8fd9\u79cd\u8fed\u4ee3\u5668\u88ab\u79f0\u4f5c &#8220;\u6e38\u6807(cursor)&#8221; \uff0c\u4ee5\u6e38\u6807\u4e3a\u53c2\u6570\u8c03\u7528\u8be5\u805a\u5408\u7684next\u64cd\u4f5c.<\/p>\n\n\n\n<p><strong>\u8fed\u4ee3\u5668 <\/strong>\u4e2d\u5b9a\u4e49\u904d\u5386\u7b97\u6cd5 : \u5bb9\u6613\u5728\u76f8\u540c\u7684\u805a\u5408\u4e0a\u4f7f\u7528\u4e0d\u540c\u7684\u8fed\u4ee3\u7b97\u6cd5; \u4e5f\u5bb9\u6613\u5728\u4e0d\u540c\u7684\u805a\u5408\u4e0a\u91cd\u7528\u76f8\u540c\u7684\u7b97\u6cd5. \u4f46\u662f\u904d\u5386\u7b97\u6cd5\u53ef\u80fd\u9700\u8981\u8bbf\u95ee\u805a\u5408\u7684\u79c1\u6709\u53d8\u91cf, \u8fd9\u6837\u4f1a\u7834\u574f\u805a\u5408\u7684\u5c01\u88c5\u6027.<\/p>\n\n\n\n<h3>4.3\u5982\u4f55\u4fdd\u8bc1\u8fed\u4ee3\u5668\u7684\u5065\u58ee\u6027<\/h3>\n\n\n\n<p>\u5065\u58ee\u7684\u8fed\u4ee3\u5668, \u4fdd\u8bc1\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u4e0d\u4f1a\u5e72\u6270\u904d\u5386\\\u4e0d\u9700\u8981copy\u8be5\u805a\u5408\u3002<\/p>\n\n\n\n<h2>\u603b\u7ed3<\/h2>\n\n\n\n<p>\u8fd8\u662f &#8220;\u8bbe\u8ba1\u6a21\u5f0f&#8221;\u4e2d\u63cf\u8ff0\u7684\u5185\u5bb9\u6bd4\u8f83\u8be6\u5c3d, &#8220;\u56fe\u89e3\u8bbe\u8ba1\u6a21\u5f0f&#8221;\u786e\u5b9e\u6bd4\u8f83\u6d45\u663e\u6613\u61c2, \u60f3\u591a\u4e86\u89e3\u4e00\u4e9b\u5c31\u5f97\u6362\u4e00\u672c\u4e66\u4e86, \u4f46\u662f\u4e0d\u5f97\u4e0d\u8bf4, \u56fe\u591a\u7684\u5c31\u662f\u6bd4\u5b57\u591a\u7684\u5bb9\u6613\u770b\u8fdb\u5165.<\/p>\n\n\n<p>\n<!--StartFragment--><\/p>\n\n\n<h2>\u8bbe\u8ba1\u6a21\u5f0f\u5c0f\u7b14\u8bb0\u7cfb\u5217<\/h2>\n\n\n\n<ul><li><a href=\"http:\/\/www.mimiq.com.cn\/?p=310\">\u4e00\u3001DeepOps-\u8bbe\u8ba1\u6a21\u5f0f\u5b66\u4e60\u5c0f\u7b14\u8bb0-\u603b\u8ff0<\/a><\/li><li><a href=\"http:\/\/www.mimiq.com.cn\/?p=328\">\u4e8c\u3001DeepOps-\u8bbe\u8ba1\u6a21\u5f0f\u5b66\u4e60\u5c0f\u7b14\u8bb0-DAY1-Iterator\u8fed\u4ee3\u5668<\/a><\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n<p><!--EndFragment--><\/p>\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" src=\"http:\/\/www.mimiq.com.cn\/wp-content\/uploads\/2019\/12\/\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u7f8e.jpg\" alt=\"\" class=\"wp-image-321\" width=\"326\" height=\"579\"\/><figcaption>\u6709\u5174\u8da3\u53ef\u4ee5\u770b\u770b\u8fd9\u4e2a\u6559\u7a0b<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5929\u8981\u6765\u5b66\u4e60\u8fed\u4ee3\u5668\u6a21\u5f0f, \u731b\u5730\u4e00\u770b\u771f\u7684\u6ca1\u4ec0\u4e48\u5185\u5bb9. \u4f46\u662f\u7ffb\u5f00\u4e66(\u8bbe\u8ba1\u6a21\u5f0f)\u4e4b\u540e, \u53d1\u73b0\u4e8b\u60c5\u6ca1\u6709\u90a3\u4e48\u7b80\u5355! 1 \u4e3b\u8981\u610f\u56fe \u8fed\u4ee3\u5668\u6a21\u5f0f\u4e3b\u8981\uff1a\u63d0\u4f9b\u4e00\u79cd\u65b9\u6cd5\u987a\u5e8f\u8bbf\u95ee\u4e00\u4e2a\u805a\u5408\u5bf9\u8c61\u4e2d\u7684\u5404\u4e2a\u5143\u7d20\uff0c\u800c\u53c8\u4e0d\u9700\u8981\u66b4\u9732\u8be5\u5bf9\u8c61\u7684\u5185\u90e8\u8868\u793a\u3002 2 \u7ec4\u6210 2.1 \u63a5\u53e3 Iterator (\u8fed\u4ee3\u5668) : \u5b9a\u4e49\u8bbf\u95ee\u548c\u904d\u5386\u5143\u7d20\u7684\u63a5\u53e3\u3002 Aggregate (\u805a\u5408) : \u5b9a\u4e49\u521b\u5efa\u76f8\u5e94\u8fed\u4ee3\u5668\u5bf9\u8c61\u7684\u63a5\u53e3\u3002 2.2 \u5b9e\u73b0 ConcreteIterator\uff08\u5177\u4f53\u8fed\u4ee3\u5668\uff09\uff1a\u5b9e\u73b0\u8fed\u4ee3\u5668\u63a5\u53e3 \uff1b\u5bf9\u805a\u5408\u904d\u5386\u65f6\u8ddf\u8e2a\u5f53\u524d\u4f4d\u7f6e\u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u7684 BookShelfIterator \u3002 ConcreteAggregate\uff08\u5177\u4f53\u805a\u5408\uff09\uff1a\u5b9e\u73b0\u521b\u5efa\u76f8\u5e94\u8fed\u4ee3\u5668\u7684\u63a5\u53e3 \uff1b\u8be5\u64cd\u4f5c\u8fd4\u56deConcreteIterator\u7684\u4e00\u4e2a\u9002\u5f53\u5b9e\u4f8b \u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u7684 BookShelf \u3002 3 \u8fed\u4ee3\u5668\u6a21\u5f0f\u7684\u4e09\u4e2a\u91cd\u8981\u4f5c\u7528 \u652f\u6301\u4e0d\u540c\u65b9\u5f0f\u904d\u5386\u4e00\u4e2a\u805a\u5408 \u7b80\u5316\u4e86\u805a\u5408\u7684\u63a5\u53e3 \u5728\u540c\u4e00\u4e2a\u805a\u5408\u4e0a\u53ef\u4ee5\u6709\u591a\u4e2a\u904d\u5386 4 \u5b9e\u73b0 4.1 \u8c01\u6765\u63a7\u5236\u8be5\u8fed\u4ee3 &#8221; \u662f\u5426\u7531\u4f7f\u7528\u8005\u63a7\u5236\u8fed\u4ee3 ? &#8221; \uff0c\u4f5c\u4e3a &#8221; \u5916\u90e8\u8fed\u4ee3\u5668 &#8221; \u548c &#8221; \u5185\u90e8\u8fed\u4ee3\u5668 &#8220;\u7684\u533a\u5206\u4f9d\u636e\u3002\u5916\u90e8\u8fed\u4ee3\u5668\uff1a\u5fc5\u987b\u7531\u4f7f\u7528\u8005\u4e3b\u52a8\u63a8\u8fdb\u4fbf\u5229\u7684\u4e0d\u53d1\uff0c\u73b0\u5b9e\u7684\u5411\u8fed\u4ee3\u5668\u8bf7\u6c42\u4e0b\u4e00\u5143\u7d20\u3002\u800c\u5185\u90e8\u8fed\u4ee3\u5668\uff1a\u5219\u53ea\u9700\u8981\u60f3\u8d77\u63d0\u4ea4\u4e00\u4e2a\u5f85\u6267\u884c\u64cd\u4f5c\uff0c\u8fed\u4ee3\u5668\u5c06\u4f1a\u5bf9\u805a\u5408\u5185\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u5e94\u7528\u8be5\u64cd\u4f5c\u3002 4.2 \u8c01\u5b9a\u4e49\u904d\u5386\u7b97\u6cd5 \u8fed\u4ee3\u5668 \u548c &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.mimiq.com.cn\/?p=328\"> <span class=\"screen-reader-text\">\u4e8c\u3001DeepOps\u7684\u8bbe\u8ba1\u6a21\u5f0f\u5c0f\u7b14\u8bb0-DAY1-Iterator\u8fed\u4ee3\u5668<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"_links":{"self":[{"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/328"}],"collection":[{"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=328"}],"version-history":[{"count":36,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/328\/revisions"}],"predecessor-version":[{"id":472,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/328\/revisions\/472"}],"wp:attachment":[{"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=328"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.mimiq.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}