{"id":530,"date":"2022-01-26T01:28:58","date_gmt":"2022-01-26T01:28:58","guid":{"rendered":"https:\/\/www.cybermedian.com\/vn\/?p=530"},"modified":"2025-02-17T11:22:36","modified_gmt":"2025-02-17T03:22:36","slug":"what-is-the-open-closed-principle-ocp","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/vn\/what-is-the-open-closed-principle-ocp\/","title":{"rendered":"Nguy\u00ean t\u1eafc m\u1edf-\u0111\u00f3ng (OCP) l\u00e0 g\u00ec?"},"content":{"rendered":"<section class=\"section section--body section--first\">\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<p class=\"graf graf--p graf-after--h3\" id=\"05f0\">Nguy\u00ean t\u1eafc<a class=\"markup--anchor markup--p-anchor\" data-href=\"https:\/\/en.wikipedia.org\/wiki\/Open%E2%80%93closed_principle#:~:text=In%20object%2Doriented%20programming%2C%20the,without%20modifying%20its%20source%20code.\" href=\"https:\/\/en.wikipedia.org\/wiki\/Open%E2%80%93closed_principle#:~:text=In%20object%2Doriented%20programming%2C%20the,without%20modifying%20its%20source%20code.\" rel=\"noopener\" target=\"_blank\">M\u1edf \/ \u0110\u00f3ng<\/a>l\u00e0 nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n nh\u1ea5t trong th\u1ebf gi\u1edbi ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m. N\u00f3 h\u01b0\u1edbng d\u1eabn ch\u00fang ta c\u00e1ch x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng \u1ed5n \u0111\u1ecbnh v\u00e0 linh ho\u1ea1t.<\/p>\n<h4 class=\"graf graf--h4 graf-after--p\" id=\"ef13\"><strong class=\"markup--strong markup--h4-strong\">\u0110\u1ecbnh ngh\u0129a:<\/strong><\/h4>\n<blockquote class=\"graf graf--blockquote graf-after--h4\" id=\"bc88\">\n<p>M\u1ed9t th\u1ef1c th\u1ec3 ph\u1ea7n m\u1ec1m nh\u01b0 l\u1edbp, m\u00f4-\u0111un v\u00e0 h\u00e0m n\u00ean m\u1edf cho vi\u1ec7c m\u1edf r\u1ed9ng v\u00e0 \u0111\u00f3ng cho vi\u1ec7c s\u1eeda \u0111\u1ed5i.<\/p>\n<\/blockquote>\n<p class=\"graf graf--p graf-after--blockquote\" id=\"8516\">\u00dd ngh\u0129a c\u1ee7a nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng l\u00e0 m\u1ed9t th\u1ef1c th\u1ec3 ph\u1ea7n m\u1ec1m n\u00ean \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i, thay v\u00ec s\u1eeda \u0111\u1ed5i m\u00e3 hi\u1ec7n c\u00f3 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i.<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"aad3\">Nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng l\u00e0 m\u1ed9t nguy\u00ean t\u1eafc h\u1ea1n ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 thi\u1ebft k\u1ebf hi\u1ec7n t\u1ea1i cho nh\u1eefng \u0111i\u1ec1u trong t\u01b0\u01a1ng lai c\u1ee7a th\u1ef1c th\u1ec3 ph\u1ea7n m\u1ec1m.<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"3cf8\">L\u01b0u \u00fd: Nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng l\u00e0 m\u1edf cho vi\u1ec7c m\u1edf r\u1ed9ng v\u00e0 \u0111\u00f3ng cho vi\u1ec7c s\u1eeda \u0111\u1ed5i. \u0110i\u1ec1u n\u00e0y kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 s\u1ebd kh\u00f4ng c\u00f3 s\u1eeda \u0111\u1ed5i n\u00e0o \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. C\u00e1c thay \u0111\u1ed5i trong c\u00e1c m\u00f4-\u0111un c\u1ea5p th\u1ea5p ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c m\u00f4-\u0111un c\u1ea5p cao, n\u1ebfu kh\u00f4ng s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t \u0111o\u1ea1n m\u00e3 c\u00f4 l\u1eadp v\u00e0 v\u00f4 ngh\u0129a.<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"adad\"><strong class=\"markup--strong markup--p-strong\">T\u1ea7m quan tr\u1ecdng c\u1ee7a nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng:<\/strong><\/p>\n<ul class=\"postList\">\n<li class=\"graf graf--li graf-after--p\" id=\"4231\">T\u00e1c \u0111\u1ed9ng c\u1ee7a nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng \u0111\u1ebfn vi\u1ec7c ki\u1ec3m th\u1eed<\/li>\n<\/ul>\n<p class=\"graf graf--p graf-after--li\" id=\"dd2a\">Nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng l\u00e0 gi\u1eef cho m\u00e3 ki\u1ec3m th\u1eed g\u1ed1c v\u1eabn c\u00f3 th\u1ec3 ch\u1ea1y b\u00ecnh th\u01b0\u1eddng, ch\u00fang ta ch\u1ec9 c\u1ea7n ki\u1ec3m th\u1eed m\u00e3 m\u1edf r\u1ed9ng.<\/p>\n<ul class=\"postList\">\n<li class=\"graf graf--li graf-after--p\" id=\"e807\">Nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng<\/li>\n<\/ul>\n<p class=\"graf graf--p graf-after--li\" id=\"1236\">Trong<a class=\"markup--anchor markup--p-anchor\" data-href=\"https:\/\/www.techopedia.com\/definition\/21105\/object-oriented-design-ood#:~:text=Object%2Doriented%20design%20(OOD)%20is%20the%20process%20of%20using,(OOP)%20process%20or%20lifecycle.\" href=\"https:\/\/www.techopedia.com\/definition\/21105\/object-oriented-design-ood#:~:text=Object%2Doriented%20design%20%28OOD%29%20is%20the%20process%20of%20using,%28OOP%29%20process%20or%20lifecycle.\" rel=\"noopener\" target=\"_blank\">thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/a>, t\u1ea5t c\u1ea3 logic \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p t\u1eeb logic nguy\u00ean t\u1eed, thay v\u00ec th\u1ef1c hi\u1ec7n m\u1ed9t logic kinh doanh trong m\u1ed9t l\u1edbp m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. Ch\u1ec9 b\u1eb1ng c\u00e1ch n\u00e0y, m\u00e3 m\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1i s\u1eed d\u1ee5ng. \u0110\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng nh\u1ecf, kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng c\u00e0ng l\u1edbn.<\/p>\n<ul class=\"postList\">\n<li class=\"graf graf--li graf-after--p\" id=\"4999\">Nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec<\/li>\n<li class=\"graf graf--li graf-after--li\" id=\"0c21\">Y\u00eau c\u1ea7u ph\u00e1t tri\u1ec3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/li>\n<\/ul>\n<p class=\"graf graf--p graf-after--li\" id=\"6c46\"><strong class=\"markup--strong markup--p-strong\">C\u00e1ch s\u1eed d\u1ee5ng nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng:<\/strong><\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"3568\"><strong class=\"markup--strong markup--p-strong\">\u0110\u1ea7u ti\u00ean<\/strong>, h\u1ea1n ch\u1ebf vi\u1ec7c m\u1edf r\u1ed9ng th\u00f4ng qua giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng, gi\u1edbi h\u1ea1n vi\u1ec7c m\u1edf r\u1ed9ng c\u1ee7a ranh gi\u1edbi, v\u00e0 kh\u00f4ng cho ph\u00e9p c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u00f4ng khai kh\u00f4ng t\u1ed3n t\u1ea1i trong giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng;<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"8d58\"><strong class=\"markup--strong markup--p-strong\">Th\u1ee9 hai<\/strong>, c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng cho c\u00e1c ki\u1ec3u tham s\u1ed1 v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng tham chi\u1ebfu thay v\u00ec c\u00e1c l\u1edbp tri\u1ec3n khai;<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"c031\"><strong class=\"markup--strong markup--p-strong\">Th\u1ee9 ba<\/strong>, l\u1edbp tr\u1eebu t\u01b0\u1ee3ng n\u00ean \u0111\u01b0\u1ee3c gi\u1eef \u1ed5n \u0111\u1ecbnh nh\u1ea5t c\u00f3 th\u1ec3, m\u1ed9t khi \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn, kh\u00f4ng cho ph\u00e9p s\u1eeda \u0111\u1ed5i.<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"22c7\">Vi\u1ec7c \u0111\u00f3ng g\u00f3i c\u00e1c thay \u0111\u1ed5i c\u00f3 hai \u00fd ngh\u0129a:<\/p>\n<p class=\"graf graf--p graf-after--p\" id=\"cda0\">\u0110\u1ea7u ti\u00ean, \u0111\u00f3ng g\u00f3i c\u00e1c thay \u0111\u1ed5i gi\u1ed1ng nhau v\u00e0o m\u1ed9t giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng;<\/p>\n<p class=\"graf graf--p graf-after--p graf--trailing\" id=\"8a51\">Th\u1ee9 hai, \u0111\u00f3ng g\u00f3i c\u00e1c thay \u0111\u1ed5i kh\u00e1c nhau v\u00e0o c\u00e1c giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng kh\u00e1c nhau. Hai thay \u0111\u1ed5i kh\u00e1c nhau kh\u00f4ng n\u00ean xu\u1ea5t hi\u1ec7n trong c\u00f9ng m\u1ed9t giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"section section--body section--last\">\n<div class=\"section-divider\">\n<hr class=\"section-divider\"\/>\n<\/div>\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<h4 class=\"graf graf--h4 graf--leading\" id=\"69e6\">V\u00ed d\u1ee5<\/h4>\n<p class=\"graf graf--p graf-after--h4\" id=\"56bf\">M\u1ed9t v\u00ed d\u1ee5, m\u1edf v\u00e0 \u0111\u00f3ng c\u1eeda b\u1eb1ng tay.<\/p>\n<figure class=\"graf graf--figure graf-after--p\" id=\"d3f2\"><img class=\"graf-image\" data-height=\"148\" data-image-id=\"0*wlXaJtn3Bexx9ev7.png\" data-width=\"453\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/vn\/wp-content\/uploads\/sites\/14\/2022\/01\/0wlXaJtn3Bexx9ev7.png\"\/><\/figure>\n<p class=\"graf graf--p graf-after--figure\" id=\"c2c2\">N\u1ebfu c\u00f3 m\u1ed9t y\u00eau c\u1ea7u m\u1edbi, c\u1ea7n ph\u1ea3i t\u0103ng ch\u1ee9c n\u0103ng m\u1edf v\u00e0 \u0111\u00f3ng ng\u0103n k\u00e9o b\u1eb1ng tay. \u0110\u1ed1i v\u1edbi m\u00e3, b\u1ea1n c\u1ea7n th\u00eam m\u1ed9t l\u1edbp Drawer v\u00e0 s\u1eeda \u0111\u1ed5i l\u1edbp Hand c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<figure class=\"graf graf--figure graf-after--p\" id=\"1d14\"><img class=\"graf-image\" data-height=\"500\" data-image-id=\"1*QXaFJLucsecnatWUuuuH6Q.png\" data-is-featured=\"true\" data-width=\"781\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/vn\/wp-content\/uploads\/sites\/14\/2022\/01\/1QXaFJLucsecnatWUuuuH6Q.png\"\/><\/figure>\n<p class=\"graf graf--p graf-after--figure\" id=\"ce83\">Theo v\u00ed d\u1ee5 c\u1ee7a nguy\u00ean t\u1eafc m\u1edf v\u00e0 \u0111\u00f3ng OCP, vi\u1ec7c m\u1edf v\u00e0 \u0111\u00f3ng c\u1eeda b\u1eb1ng tay ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t giao di\u1ec7n, v\u00e0 l\u1edbp tri\u1ec3n khai c\u1ee5 th\u1ec3 th\u1ef1c hi\u1ec7n giao di\u1ec7n n\u00e0y.<\/p>\n<figure class=\"graf graf--figure graf-after--p\" id=\"28a1\"><img class=\"graf-image\" data-height=\"461\" data-image-id=\"1*NVWYY0ZYvgMJbnENhw1QKw.png\" data-width=\"800\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/vn\/wp-content\/uploads\/sites\/14\/2022\/01\/1NVWYY0ZYvgMJbnENhw1QKw.png\"\/><\/figure>\n<p class=\"graf graf--p graf-after--figure\" id=\"2372\">Khi c\u1ea7n t\u0103ng s\u1ed1 l\u01b0\u1ee3ng tay \u0111\u1ec3 m\u1edf v\u00e0 \u0111\u00f3ng t\u1ee7 l\u1ea1nh, l\u1edbp t\u1ee7 l\u1ea1nh th\u1ef1c hi\u1ec7n giao di\u1ec7n n\u00e0y m\u00e0 kh\u00f4ng s\u1eeda \u0111\u1ed5i l\u1edbp Hand v\u00e0 giao di\u1ec7n g\u1ed1c.<\/p>\n<figure class=\"graf graf--figure graf-after--p\" id=\"6688\"><img class=\"graf-image\" data-height=\"464\" data-image-id=\"1*iR6WQOaVLjFUMy1056vL-w.png\" data-width=\"946\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/vn\/wp-content\/uploads\/sites\/14\/2022\/01\/1iR6WQOaVLjFUMy1056vL-w.png\"\/><\/figure>\n<h4 class=\"graf graf--h4 graf-after--figure\" id=\"246b\">Nhi\u1ec1u t\u00e0i nguy\u00ean h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng h\u01a1n<\/h4>\n<ul class=\"postList\">\n<li class=\"graf graf--li graf-after--h4\" id=\"3002\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"https:\/\/reflectoring.io\/open-closed-principle-explained\/\" href=\"https:\/\/reflectoring.io\/open-closed-principle-explained\/\" rel=\"noopener\" target=\"_blank\">Gi\u1ea3i th\u00edch nguy\u00ean t\u1eafc m\u1edf-\u0111\u00f3ng<\/a><\/li>\n<li class=\"graf graf--li graf-after--li\" id=\"be77\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/uml-class-diagram-tutorial\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/uml-class-diagram-tutorial\/\" rel=\"noopener\" target=\"_blank\">H\u01b0\u1edbng d\u1eabn s\u01a1 \u0111\u1ed3 l\u1edbp UML<\/a><\/li>\n<li class=\"graf graf--li graf-after--li\" id=\"d80e\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-class-diagram\/\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-class-diagram\/\" rel=\"noopener\" target=\"_blank\">S\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 g\u00ec?<\/a><\/li>\n<li class=\"graf graf--li graf-after--li\" id=\"f4cf\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"https:\/\/online.visual-paradigm.com\/diagrams\/solutions\/free-class-diagram-tool\/\" href=\"https:\/\/online.visual-paradigm.com\/diagrams\/solutions\/free-class-diagram-tool\/\" rel=\"noopener\" target=\"_blank\">C\u00f4ng c\u1ee5 s\u01a1 \u0111\u1ed3 l\u1edbp mi\u1ec5n ph\u00ed<\/a><\/li>\n<li class=\"graf graf--li graf-after--li\" id=\"8e66\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"http:\/\/Online Class Diagram Software\" href=\"http:\/\/Online%20Class%20Diagram%20Software\" rel=\"noopener\" target=\"_blank\">Ph\u1ea7n m\u1ec1m s\u01a1 \u0111\u1ed3 l\u1edbp tr\u1ef1c tuy\u1ebfn<\/a><\/li>\n<li class=\"graf graf--li graf-after--li graf--trailing\" id=\"1b39\"><a class=\"markup--anchor markup--li-anchor\" data-href=\"https:\/\/www.google.com\/search?q=uml+visaul+paradigm&amp;sxsrf=AOaemvJcREGG3huPXRdERD5w15PnUrAxuQ%3A1632104970304&amp;ei=CvJHYYfpEai9mAW8u67YAg&amp;oq=uml+visaul+paradigm&amp;gs_lcp=Cgdnd3Mtd2l6EAMyBwgjELACECcyBAgAEA0yBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeOgQIABBDOg0ILhCxAxDHARDRAxBDOggIABCABBCxAzoFCAAQsQM6DgguEIAEELEDEMcBEKMCOgsILhCABBCxAxCDAToECCMQJzoFCAAQkQI6BQgAEIAEOgoIABCABBCHAhAUOgYIABANEB5KBAhBGABQ8fYzWJ-YNGCpmzRoAHACeACAAYUBiAHeDJIBBDE2LjOYAQCgAQHAAQE&amp;sclient=gws-wiz&amp;ved=0ahUKEwiHlvbnwIzzAhWoHqYKHbydCysQ4dUDCA4&amp;uact=5\" href=\"https:\/\/www.google.com\/search?q=uml+visaul+paradigm&amp;sxsrf=AOaemvJcREGG3huPXRdERD5w15PnUrAxuQ%3A1632104970304&amp;ei=CvJHYYfpEai9mAW8u67YAg&amp;oq=uml+visaul+paradigm&amp;gs_lcp=Cgdnd3Mtd2l6EAMyBwgjELACECcyBAgAEA0yBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIGCAAQFhAeOgQIABBDOg0ILhCxAxDHARDRAxBDOggIABCABBCxAzoFCAAQsQM6DgguEIAEELEDEMcBEKMCOgsILhCABBCxAxCDAToECCMQJzoFCAAQkQI6BQgAEIAEOgoIABCABBCHAhAUOgYIABANEB5KBAhBGABQ8fYzWJ-YNGCpmzRoAHACeACAAYUBiAHeDJIBBDE2LjOYAQCgAQHAAQE&amp;sclient=gws-wiz&amp;ved=0ahUKEwiHlvbnwIzzAhWoHqYKHbydCysQ4dUDCA4&amp;uact=5\" rel=\"noopener\" target=\"_blank\">Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh th\u1ed1ng nh\u1ea5t (UML) l\u00e0 g\u00ec?<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>The\u00a0Open \/ Closed Principle\u00a0is the most basic design principle in the software development world. It guides us how to build a stable and flexible system. A software entity such as class, module, and function should be open for extension and closed for modification.<\/p>\n","protected":false},"author":1,"featured_media":1383,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[2,5],"tags":[52,63,62,53],"class_list":["post-530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agile-project-management","category-software-engineering","tag-cn-done","tag-es-done","tag-ja-done","tag-tw-done"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Nguy\u00ean t\u1eafc m\u1edf-\u0111\u00f3ng (OCP) l\u00e0 g\u00ec? - Cybermedian<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cybermedian.com\/vn\/what-is-the-open-closed-principle-ocp\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nguy\u00ean t\u1eafc m\u1edf-\u0111\u00f3ng (OCP) l\u00e0 g\u00ec? - Cybermedian\" \/>\n<meta property=\"og:description\" content=\"The\u00a0Open \/ Closed Principle\u00a0is the most basic design principle in the software development world. 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