{"id":4071,"date":"2024-12-14T09:00:36","date_gmt":"2024-12-14T06:00:36","guid":{"rendered":"https:\/\/demensdeum.com\/blog\/2024\/12\/14\/dry-matters\/"},"modified":"2024-12-16T22:32:09","modified_gmt":"2024-12-16T19:32:09","slug":"dry-matters","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/zh\/2024\/12\/14\/dry-matters\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u5e72\u71e5\u5f88\u91cd\u8981"},"content":{"rendered":"<p>\u5173\u4e8e DRY \u4e3b\u9898\u7684\u6587\u7ae0\u6709\u5f88\u591a\uff0c\u6211\u5efa\u8bae\u9605\u8bfb Andy Hunt \u548c Dave Thomas \u7684\u539f\u59cb\u8d44\u6599\u201cThe Pragmatist Programmer\u201d\u3002\u7136\u800c\uff0c\u6211\u4ecd\u7136\u770b\u5230\u6709\u591a\u5c11\u5f00\u53d1\u8005\u5bf9\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u7684\u8fd9\u4e00\u539f\u5219\u5b58\u5728\u7591\u95ee\u3002<\/p>\n<p>DRY \u539f\u5219\u6307\u51fa\u6211\u4eec\u4e0d\u5e94\u8be5\u91cd\u590d\u81ea\u5df1\uff0c\u8fd9\u9002\u7528\u4e8e\u6211\u4eec\u4f5c\u4e3a\u7a0b\u5e8f\u5458\u6267\u884c\u7684\u4ee3\u7801\u548c\u6d41\u7a0b\u3002\u8fdd\u53cd DRY \u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-swift\" data-lang=\"Swift\"><code>class Client {\n    public let name: String\n    private var messages: [String] = []\n    \n    init(name: String) {\n        self.name = name\n    }\n    \n    func receive(_ message: String) {\n        messages.append(message)\n    }\n}\n\nclass ClientController {\n    func greet(client: Client?) {\n        guard let client else {\n            debugPrint(\"No client!\")\n            return\n        }\n        client.receive(\"Hello \\(client.name)!\")\n    }\n\n    func goodbye(client: Client?) {\n        guard let client else {\n            debugPrint(\"No client!!\")\n            return\n        }\n        client.receive(\"Bye \\(client.name)!\")\n    }\n}\n<\/code><\/pre>\n<\/div>\n<p>\u6b63\u5982\u60a8\u5728greet \u548cgoodbye \u65b9\u6cd5\u4e2d\u770b\u5230\u7684\uff0c\u4f20\u9012\u4e86Client \u7c7b\u7684\u4e00\u4e2a\u53ef\u9009\u5b9e\u4f8b\uff0c\u7136\u540e\u9700\u8981\u68c0\u67e5\u8be5\u5b9e\u4f8b\u662f\u5426\u4e3anil\uff0c\u7136\u540e\u60a8\u5c31\u53ef\u4ee5\u5f00\u59cb\u4f7f\u7528\u5b83\u4e86\u3002\u4e3a\u4e86\u7b26\u5408 DRY \u65b9\u6cd5\uff0c\u60a8\u9700\u8981\u5220\u9664\u7c7b\u5b9e\u4f8b\u7684\u91cd\u590d nil \u68c0\u67e5\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff1b\u4e00\u79cd\u9009\u62e9\u662f\u5c06\u5b9e\u4f8b\u4f20\u9012\u7ed9\u7c7b\u6784\u9020\u51fd\u6570\uff0c\u4e4b\u540e\u5c31\u4e0d\u9700\u8981\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n<p>\u6211\u4eec\u5728\u5355\u4e2a\u5ba2\u6237\u7aef\u5b9e\u4f8b\u4e0a\u4f7f\u7528 ClientController \u4e13\u4e1a\u5316\u6765\u9075\u5b88 DRY\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-swift\" data-lang=\"Swift\"><code>class Client {\n    public let name: String\n    private var messages: [String] = []\n    \n    init(name: String) {\n        self.name = name\n    }\n    \n    func receive(_ message: String) {\n        messages.append(message)\n    }\n}\n\nclass ClientController {\n    private let client: Client\n\n    init(client: Client) {\n        self.client = client\n    }\n\n    func greet() {\n        client.receive(\"Hello \\(client.name)!\")\n    }\n\n    func goodbye() {\n        client.receive(\"Bye \\(client.name)!\")\n    }\n}\n<\/code><\/pre>\n<\/div>\n<p>DRY \u8fd8\u6d89\u53ca\u8f6f\u4ef6\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u53d1\u751f\u7684\u6d41\u7a0b\u3002\u8ba9\u6211\u4eec\u60f3\u8c61\u4e00\u79cd\u60c5\u51b5\uff0c\u5f00\u53d1\u56e2\u961f\u5fc5\u987b\u81ea\u5df1\u5411\u5e02\u573a\u4e0a\u4f20\u7248\u672c\uff0c\u5206\u6563\u4ed6\u4eec\u5bf9\u8f6f\u4ef6\u5f00\u53d1\u7684\u6ce8\u610f\u529b\uff0c\u8fd9\u4e5f\u662f\u8fdd\u53cd DRY \u7684\u3002\u8fd9\u79cd\u60c5\u51b5\u53ef\u4ee5\u901a\u8fc7\u8fde\u63a5 CI\/CD \u7ba1\u9053\u6765\u89e3\u51b3\uff0c\u5728\u8be5\u7ba1\u9053\u4e2d\uff0c\u53ea\u8981\u5f00\u53d1\u4eba\u5458\u6ee1\u8db3\u67d0\u4e9b\u6761\u4ef6\uff0c\u5c31\u4f1a\u81ea\u52a8\u53d1\u5e03\u7248\u672c\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0cDRY \u662f\u6307\u6d41\u7a0b\u548c\u4ee3\u7801\u4e2d\u4e0d\u5b58\u5728\u91cd\u590d\uff0c\u8fd9\u4e5f\u5f88\u91cd\u8981\uff0c\u56e0\u4e3a\u4eba\u4e3a\u56e0\u7d20\u7684\u5b58\u5728\uff1a\u5305\u542b\u8f83\u5c11\u91cd\u590d\u3001\u566a\u58f0\u4ee3\u7801\u7684\u4ee3\u7801\u66f4\u5bb9\u6613\u68c0\u67e5\u9519\u8bef\uff1b\u81ea\u52a8\u5316\u6d41\u7a0b\u4f7f\u4eba\u4eec\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u4e0d\u53ef\u80fd\u72af\u9519\u8bef\uff0c\u56e0\u4e3a\u6ca1\u6709\u4eba\u53c2\u4e0e\u3002<\/p>\n<p>\u53f2\u8482\u592b\u00b7\u4e54\u5e03\u65af\uff08Steve Jobs\uff09\u6709\u53e5\u540d\u8a00\uff1a\u201c\u4f60\u6c38\u8fdc\u4e0d\u5fc5\u7f16\u5199\u7684\u4e00\u884c\u4ee3\u7801\u5c31\u662f\u4f60\u6c38\u8fdc\u4e0d\u5fc5\u8c03\u8bd5\u7684\u4e00\u884c\u4ee3\u7801\u3002\u201d<\/p>\n<h2>\u6765\u6e90<\/h2>\n<p><a href=\"https:\/\/pragprog.com\/titles\/tpp20\/the-pragmatic-programmer-20th-anniversary-edition\/\" rel=\"noopener\" target=\"_blank\">https:\/\/pragprog.com\/titles\/tpp20\/the-pragmatic-programmer-20th-anniversary-edition\/<\/a><br \/>\n<a href=\"https:\/\/youtu.be\/-msIEOGvTYM\" rel=\"noopener\" target=\"_blank\">https:\/\/youtu.be\/-msIEOGvTYM<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5173\u4e8e DRY \u4e3b\u9898\u7684\u6587\u7ae0\u6709\u5f88\u591a\uff0c\u6211\u5efa\u8bae\u9605\u8bfb Andy Hunt \u548c Dave Thomas \u7684\u539f\u59cb\u8d44\u6599\u201cThe Pragmatist Programmer\u201d\u3002\u7136\u800c\uff0c\u6211\u4ecd\u7136\u770b\u5230\u6709\u591a\u5c11\u5f00\u53d1\u8005\u5bf9\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u7684\u8fd9\u4e00\u539f\u5219\u5b58\u5728\u7591\u95ee\u3002 DRY \u539f\u5219\u6307\u51fa\u6211\u4eec\u4e0d\u5e94\u8be5\u91cd\u590d\u81ea\u5df1\uff0c\u8fd9\u9002\u7528\u4e8e\u6211\u4eec\u4f5c\u4e3a\u7a0b\u5e8f\u5458\u6267\u884c\u7684\u4ee3\u7801\u548c\u6d41\u7a0b\u3002\u8fdd\u53cd DRY \u7684\u793a\u4f8b\u4ee3\u7801\uff1a class Client { public let name: String private var messages: [String] = [] init(name: String) { self.name = name } func receive(_ message: String) { messages.append(message) } } class ClientController { func greet(client: Client?) { guard let client else {<a class=\"more-link\" href=\"https:\/\/demensdeum.com\/blog\/zh\/2024\/12\/14\/dry-matters\/\">Continue reading <span class=\"screen-reader-text\">&#8220;\u4e3a\u4ec0\u4e48\u5e72\u71e5\u5f88\u91cd\u8981&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[49],"tags":[],"class_list":["post-4071","post","type-post","status-publish","format-standard","hentry","category-blog","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"zh","enabled_languages":["en","ru","zh","de","fr","ja","pt"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/4071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/comments?post=4071"}],"version-history":[{"count":7,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/4071\/revisions"}],"predecessor-version":[{"id":4078,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/4071\/revisions\/4078"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/media?parent=4071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/categories?post=4071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/tags?post=4071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}