{"id":1499,"date":"2026-03-31T18:45:28","date_gmt":"2026-03-31T18:45:28","guid":{"rendered":"https:\/\/www.viz-read.com\/vi\/object-diagram-myth-buster-guide\/"},"modified":"2026-03-31T18:45:28","modified_gmt":"2026-03-31T18:45:28","slug":"object-diagram-myth-buster-guide","status":"publish","type":"post","link":"https:\/\/www.viz-read.com\/vi\/object-diagram-myth-buster-guide\/","title":{"rendered":"B\u00e0i ph\u00e1 b\u1ecf hi\u1ec3u l\u1ea7m v\u1ec1 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng: Ph\u00e2n bi\u1ec7t s\u1ef1 th\u1eadt v\u1edbi h\u01b0 c\u1ea5u d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u"},"content":{"rendered":"<p>Hi\u1ec3u \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c hi\u1ec3u c\u00e1ch c\u00e1c th\u1ee9 ho\u1ea1t \u0111\u1ed9ng. N\u00f3 \u0111\u00f2i h\u1ecfi ph\u1ea3i bi\u1ebft c\u00e1ch c\u00e1c th\u1ee9 t\u1ed3n t\u1ea1i v\u00e0o m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. Trong th\u1ebf gi\u1edbi ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m v\u00e0 m\u00f4 h\u00ecnh h\u00f3a, s\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 b\u1ecb hi\u1ec3u l\u1ea7m nhi\u1ec1u nh\u1ea5t trong b\u1ed9 c\u00f4ng c\u1ee5 Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML) l\u00e0 S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. Nhi\u1ec1u ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u ti\u1ebfp c\u1eadn n\u00f3 v\u1edbi s\u1ef1 b\u1ed1i r\u1ed1i, lo s\u1ee3 r\u1eb1ng n\u00f3 qu\u00e1 ph\u1ee9c t\u1ea1p ho\u1eb7c th\u1eeba th\u00e3i. H\u01b0\u1edbng d\u1eabn n\u00e0y nh\u1eb1m l\u00e0m r\u00f5 nh\u1eefng hi\u1ec3u l\u1ea7m.<\/p>\n<p>D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u, l\u00ean k\u1ebf ho\u1ea1ch cho m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, hay \u0111\u01a1n gi\u1ea3n ch\u1ec9 \u0111ang c\u1ed1 g\u1eafng t\u00e0i li\u1ec7u h\u00f3a m\u1ed9t m\u00e3 ngu\u1ed3n c\u0169, vi\u1ec7c n\u1eafm \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t th\u1ef1c s\u1ef1 c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m h\u00e0ng gi\u1edd \u0111\u1ed3ng h\u1ed3 hi\u1ec3u l\u1ea7m. Ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o vi\u1ec7c nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y th\u1ef1c s\u1ef1 \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u g\u00ec, lo\u1ea1i b\u1ecf nh\u1eefng hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn, v\u00e0 cung c\u1ea5p m\u1ed9t khung th\u1ef1c ti\u1ec5n cho vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang. Kh\u00f4ng l\u1eddi hoa m\u1ef9, kh\u00f4ng qu\u1ea3ng c\u00e1o, ch\u1ec9 c\u00f3 nh\u1eefng s\u1ef1 th\u1eadt k\u1ef9 thu\u1eadt r\u00f5 r\u00e0ng.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Chalkboard-style educational infographic busting three common myths about UML Object Diagrams: features side-by-side class diagram vs object diagram comparison (blueprint versus runtime snapshot), illustrates object anatomy with labeled example box showing instance name, class type, and attribute values, lists key use cases like debugging complex associations and training new developers, all presented in hand-written teacher aesthetic with colorful chalk text on blackboard background for intuitive learning\" decoding=\"async\" src=\"https:\/\/www.viz-read.com\/wp-content\/uploads\/2026\/03\/object-diagram-myth-buster-chalkboard-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c s\u1ef1 l\u00e0 g\u00ec? \ud83e\udde9<\/h2>\n<p>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t lo\u1ea1i s\u01a1 \u0111\u1ed3 c\u1ea5u tr\u00fac t\u0129nh trong UML. N\u00f3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t b\u1ee9c \u1ea3nh t\u0129nh c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. Trong khi s\u01a1 \u0111\u1ed3 l\u1edbp m\u00f4 t\u1ea3 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf hay khu\u00f4n m\u1eabu c\u1ee7a h\u1ec7 th\u1ed1ng, th\u00ec s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng m\u00f4 t\u1ea3 c\u00e1c th\u1ec3 hi\u1ec7n th\u1ef1c t\u1ebf \u0111ang ch\u1ea1y trong khu\u00f4n m\u1eabu \u0111\u00f3.<\/p>\n<p>H\u00e3y h\u00ecnh dung nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>S\u01a1 \u0111\u1ed3 l\u1edbp:<\/strong> L\u00e0 b\u1ea3n v\u1ebd ki\u1ebfn tr\u00fac c\u1ee7a m\u1ed9t ng\u00f4i nh\u00e0. N\u00f3 cho th\u1ea5y c\u1eeda v\u00e0 c\u1eeda s\u1ed5 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf \u0111\u00e2u, v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, v\u00e0 b\u1ed1 c\u1ee5c t\u1ed5ng th\u1ec3.<\/li>\n<li><strong>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong> L\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p ng\u00f4i nh\u00e0 khi ai \u0111\u00f3 \u0111ang s\u1ed1ng trong \u0111\u00f3. N\u00f3 cho th\u1ea5y \u0111\u1ed3 \u0111\u1ea1c c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u00e1c ph\u00f2ng, \u0111\u00e8n \u0111\u00e3 b\u1eadt, v\u00e0 tr\u1ea1ng th\u00e1i c\u1ee5 th\u1ec3 c\u1ee7a ng\u00f4i nh\u00e0 ngay l\u00fac n\u00e0y.<\/li>\n<\/ul>\n<p>V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong> L\u00e0 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp. Ch\u00fang \u0111\u01b0\u1ee3c \u0111\u00e1nh nh\u00e3n b\u1eb1ng t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng, theo sau l\u00e0 d\u1ea5u hai ch\u1ea5m v\u00e0 t\u00ean l\u1edbp (v\u00ed d\u1ee5,<code>user1 : User<\/code>).<\/li>\n<li><strong>C\u00e1c li\u00ean k\u1ebft:<\/strong> L\u00e0 c\u00e1c m\u1ed1i li\u00ean k\u1ebft gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho c\u00e1c m\u1ed1i quan h\u1ec7 t\u1ed3n t\u1ea1i gi\u1eefa c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3.<\/li>\n<li><strong>Thu\u1ed9c t\u00ednh:<\/strong> L\u00e0 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 m\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang gi\u1eef t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111\u00f3 (v\u00ed d\u1ee5,<code>user1 : User [id: 101, status: active]<\/code>).<\/li>\n<\/ul>\n<p>Nh\u1eefng s\u01a1 \u0111\u1ed3 n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u1ef1c quan h\u00f3a c\u00e1c c\u1ea5u tr\u00fac \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1eabu t\u1ed5 h\u1ee3p ho\u1eb7c c\u1ea5u tr\u00fac l\u1ed3ng gh\u00e9p s\u00e2u, n\u01a1i s\u01a1 \u0111\u1ed3 l\u1edbp c\u00f3 th\u1ec3 tr\u1edf n\u00ean qu\u00e1 tr\u1eebu t\u01b0\u1ee3ng \u0111\u1ec3 h\u1eefu \u00edch.<\/p>\n<h2>Hi\u1ec3u l\u1ea7m 1: N\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh t\u0129nh t\u1eeb s\u01a1 \u0111\u1ed3 l\u1edbp \ud83d\udcf8<\/h2>\n<p>Hi\u1ec3u l\u1ea7m dai d\u1eb3ng nh\u1ea5t v\u1ec1 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 ch\u00fang ch\u1ec9 l\u00e0 m\u1ed9t c\u00e1i nh\u00ecn t\u0129nh t\u1eeb s\u01a1 \u0111\u1ed3 l\u1edbp. D\u00f9 ch\u00fang chia s\u1ebb c\u00e1c y\u1ebfu t\u1ed1 c\u1ea5u tr\u00fac, nh\u01b0ng ni\u1ec1m tin n\u00e0y l\u00e0m \u0111\u01a1n gi\u1ea3n h\u00f3a qu\u00e1 m\u1ee9c gi\u00e1 tr\u1ecb v\u00e0 m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang.<\/p>\n<p>\u0110\u00fang l\u00e0 m\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng trong s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i thu\u1ed9c v\u1ec1 m\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a \u1edf n\u01a1i kh\u00e1c. Tuy nhi\u00ean, m\u1ed1i quan h\u1ec7 kh\u00f4ng \u0111\u01a1n thu\u1ea7n l\u00e0 s\u1ef1 r\u00fat g\u1ecdn. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao hi\u1ec3u l\u1ea7m n\u00e0y g\u00e2y hi\u1ec3u nh\u1ea7m:<\/p>\n<ul>\n<li><strong>T\u00ednh c\u1ee5 th\u1ec3:<\/strong> S\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ecbnh ngh\u0129a c\u00e1c m\u1ed1i quan h\u1ec7 ti\u1ec1m n\u0103ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecbnh ngh\u0129a c\u00e1c m\u1ed1i quan h\u1ec7 th\u1ef1c t\u1ebf. S\u01a1 \u0111\u1ed3 l\u1edbp c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb m\u1ed9t m\u1ed1i quan h\u1ec7 &#8216;Nhi\u1ec1u-\u0111\u1ebfn-M\u1ed9t&#8217;. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb ba ng\u01b0\u1eddi d\u00f9ng c\u1ee5 th\u1ec3, t\u1ea5t c\u1ea3 \u0111\u1ec1u li\u00ean k\u1ebft v\u1edbi m\u1ed9t th\u1ec3 hi\u1ec7n &#8216;Qu\u1ea3n tr\u1ecb vi\u00ean&#8217; c\u1ee5 th\u1ec3 duy nh\u1ea5t.<\/li>\n<li><strong>T\u00ednh minh b\u1ea1ch tr\u1ea1ng th\u00e1i:<\/strong> S\u01a1 \u0111\u1ed3 l\u1edbp hi\u1ebfm khi hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u01b0\u1eddng l\u00e0m v\u1eady. Vi\u1ec7c th\u1ea5y \u0111\u01b0\u1ee3c<code>accountBalance: 500.00<\/code> l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft khi g\u1ee1 l\u1ed7i logic t\u00e0i ch\u00ednh, nh\u01b0ng kh\u00f4ng li\u00ean quan khi thi\u1ebft k\u1ebf l\u1edbp \u2018Account\u2019 t\u1ed5ng qu\u00e1t.<\/li>\n<li><strong>Ki\u1ec3m tra r\u00e0ng bu\u1ed9c:<\/strong>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap x\u00e1c minh c\u00e1c r\u00e0ng bu\u1ed9c b\u1ed9i s\u1ed1. N\u1ebfu s\u01a1 \u0111\u1ed3 l\u1edbp cho ph\u00e9p kh\u00f4ng c\u00f3 ho\u1eb7c ch\u1ec9 m\u1ed9t cha, nh\u01b0ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u1ea1i hi\u1ec3n th\u1ecb hai \u0111\u1ed1i t\u01b0\u1ee3ng cha li\u00ean k\u1ebft v\u1edbi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng con, th\u00ec m\u00f4 h\u00ecnh l\u00e0 kh\u00f4ng h\u1ee3p l\u1ec7. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ngay l\u1eadp t\u1ee9c ti\u1ebft l\u1ed9 nh\u1eefng l\u1ed7i logic n\u00e0y.<\/li>\n<\/ul>\n<p>Do \u0111\u00f3, coi ch\u00fang l\u00e0 c\u00f4ng c\u1ee5 gi\u1ed1ng nhau s\u1ebd d\u1eabn \u0111\u1ebfn t\u00e0i li\u1ec7u kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7. B\u1ea1n s\u1ebd m\u1ea5t \u0111i m\u1ee9c \u0111\u1ed9 chi ti\u1ebft c\u1ea7n thi\u1ebft cho ph\u00e2n t\u00edch th\u1eddi gian ch\u1ea1y.<\/p>\n<h2>Nghi\u1ec7m 2: Ch\u00fang qu\u00e1 ph\u1ee9c t\u1ea1p cho ph\u00e1t tri\u1ec3n linh ho\u1ea1t ho\u1eb7c ph\u00e1t tri\u1ec3n nhanh \u23f1\ufe0f<\/h2>\n<p>M\u1ed9t hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn kh\u00e1c l\u00e0 vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ea5t qu\u00e1 nhi\u1ec1u th\u1eddi gian, khi\u1ebfn ch\u00fang kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t tri\u1ec3n linh ho\u1ea1t ho\u1eb7c m\u00f4 h\u00ecnh h\u00f3a nhanh. Nh\u1eefng ng\u01b0\u1eddi ch\u1ec9 tr\u00edch cho r\u1eb1ng vi\u1ec7c v\u1ebd c\u00e1c th\u1ec3 hi\u1ec7n cho t\u1eebng bi\u1ebfn l\u00e0 ph\u00ed ph\u1ea1m c\u00f4ng s\u1ee9c.<\/p>\n<p>M\u1eb7c d\u00f9 \u0111\u00fang l\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng chi ti\u1ebft cho c\u00e1c h\u1ec7 th\u1ed1ng l\u1edbn c\u00f3 th\u1ec3 m\u1ea5t nhi\u1ec1u th\u1eddi gian, nh\u01b0ng quan \u0111i\u1ec3m n\u00e0y b\u1ecf qua c\u00e1ch \u1ee9ng d\u1ee5ng chi\u1ebfn l\u01b0\u1ee3c c\u00f4ng c\u1ee5 n\u00e0y. B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i v\u1ebd s\u01a1 \u0111\u1ed3 cho m\u1ecdi \u0111\u1ed1i t\u01b0\u1ee3ng trong h\u1ec7 th\u1ed1ng.<\/p>\n<ul>\n<li><strong>T\u1eadp trung v\u00e0o c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng:<\/strong>Ch\u1ec9 v\u1ebd s\u01a1 \u0111\u1ed3 c\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u quan tr\u1ecdng li\u00ean quan \u0111\u1ebfn m\u1ed9t t\u00ednh n\u0103ng c\u1ee5 th\u1ec3 ho\u1eb7c b\u00e1o c\u00e1o l\u1ed7i. N\u1ebfu x\u1ea3y ra l\u1ed7i x\u1eed l\u00fd thanh to\u00e1n, h\u00e3y v\u1ebd s\u01a1 \u0111\u1ed3 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0o lu\u1ed3ng giao d\u1ecbch \u0111\u00f3.<\/li>\n<li><strong>C\u00f4ng c\u1ee5 giao ti\u1ebfp:<\/strong>Trong c\u00e1c cu\u1ed9c h\u1ecdp nh\u00f3m, m\u1ed9t b\u1ea3n ph\u00e1c th\u1ea3o nhanh c\u00e1c th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m r\u00f5 y\u00eau c\u1ea7u nhanh h\u01a1n m\u1ed9t trang v\u0103n b\u1ea3n. N\u00f3 gi\u00fap c\u1ea3 nh\u00f3m th\u1ed1ng nh\u1ea5t v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n t\u00e0i li\u1ec7u thi\u1ebft k\u1ebf \u0111\u1ea7y \u0111\u1ee7.<\/li>\n<li><strong>Tinh ch\u1ec9nh theo t\u1eebng b\u01b0\u1edbc:<\/strong>B\u1eaft \u0111\u1ea7u b\u1eb1ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ea5p cao \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ph\u1ea1m vi, sau \u0111\u00f3 tinh ch\u1ec9nh d\u1ea7n theo s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ec7 th\u1ed1ng. N\u00f3 kh\u00f4ng c\u1ea7n ph\u1ea3i ho\u00e0n h\u1ea3o ngay t\u1eeb b\u1ea3n nh\u00e1p \u0111\u1ea7u ti\u00ean.<\/li>\n<\/ul>\n<p>M\u1ee5c ti\u00eau l\u00e0 s\u1ef1 r\u00f5 r\u00e0ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 \u0111\u1ea7y \u0111\u1ee7. N\u1ebfu s\u01a1 \u0111\u1ed3 gi\u00fap nh\u00f3m hi\u1ec3u \u0111\u01b0\u1ee3c tr\u1ea1ng th\u00e1i d\u1eef li\u1ec7u, th\u00ec th\u1eddi gian d\u00e0nh \u0111\u1ec3 t\u1ea1o n\u00f3 l\u00e0 x\u1ee9ng \u0111\u00e1ng.<\/p>\n<h2>Nghi\u1ec7m 3: S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n h\u00e0nh vi \ud83c\udfad<\/h2>\n<p>M\u1ed9t s\u1ed1 ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u nh\u1ea7m l\u1eabn s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 ho\u1eb7c s\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i. H\u1ecd cho r\u1eb1ng v\u00ec c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng tham gia, n\u00ean s\u01a1 \u0111\u1ed3 ph\u1ea3i th\u1ec3 hi\u1ec7n c\u00e1ch ch\u00fang h\u00e0nh \u0111\u1ed9ng ho\u1eb7c thay \u0111\u1ed5i theo th\u1eddi gian.<\/p>\n<p>\u0110i\u1ec1u n\u00e0y l\u00e0 sai v\u1ec1 m\u1eb7t s\u1ef1 th\u1eadt. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ho\u00e0n to\u00e0n <strong>t\u0129nh<\/strong>. Ch\u00fang kh\u00f4ng th\u1ec3 hi\u1ec7n:<\/p>\n<ul>\n<li>Th\u1ee9 t\u1ef1 g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n<li>Lu\u1ed3ng d\u1eef li\u1ec7u theo th\u1eddi gian.<\/li>\n<li>Chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i (v\u00ed d\u1ee5: t\u1eeb \u2018\u0110ang ch\u1edd\u2019 sang \u2018\u0110\u00e3 g\u1eedi\u2019).<\/li>\n<\/ul>\n<p>Ch\u00fang ch\u1ec9 th\u1ec3 hi\u1ec7n c\u00e1c k\u1ebft n\u1ed1i c\u1ea5u tr\u00fac v\u00e0 tr\u1ea1ng th\u00e1i thu\u1ed9c t\u00ednh t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m nh\u1ea5t \u0111\u1ecbnh. N\u1ebfu b\u1ea1n c\u1ea7n th\u1ec3 hi\u1ec7n h\u00e0nh vi, b\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng lo\u1ea1i s\u01a1 \u0111\u1ed3 kh\u00e1c. Vi\u1ec7c tr\u1ed9n l\u1eabn c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y s\u1ebd khi\u1ebfn ng\u01b0\u1eddi \u0111\u1ecdc b\u1ed1i r\u1ed1i.<\/p>\n<p>Tuy nhi\u00ean, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng nh\u01b0 \u0111i\u1ec3m tham chi\u1ebfu cho c\u00e1c s\u01a1 \u0111\u1ed3 h\u00e0nh vi. Ch\u00fang cung c\u1ea5p b\u1ed1i c\u1ea3nh: \u2018\u0110\u00e2y l\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng tham gia.\u2019 Sau \u0111\u00f3, s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 gi\u1ea3i th\u00edch: \u2018\u0110\u00e2y l\u00e0 nh\u1eefng g\u00ec ch\u00fang l\u00e0m.\u2019 Gi\u1eef ch\u00fang ri\u00eang bi\u1ec7t s\u1ebd duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u00f4 h\u00ecnh.<\/p>\n<h2>C\u1ea5u t\u1ea1o c\u1ee7a m\u1ed9t s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00fang chu\u1ea9n \ud83d\udee0\ufe0f<\/h2>\n<p>\u0110\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7u qu\u1ea3, b\u1ea1n ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc ng\u1eef ph\u00e1p c\u1ee5 th\u1ec3. Vi\u1ec7c l\u1ec7ch kh\u1ecfi c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y s\u1ebd t\u1ea1o ra s\u1ef1 m\u01a1 h\u1ed3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i b\u1ea1n c\u1ea7n n\u1eafm v\u1eefng.<\/p>\n<h3>1. Nh\u1eadn di\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng<\/h3>\n<p>M\u1ed7i h\u1ed9p \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i ch\u1ee9a hai d\u00f2ng:<\/p>\n<ul>\n<li><strong>D\u00f2ng tr\u00ean:<\/strong> T\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng (t\u00f9y ch\u1ecdn, nh\u01b0ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh duy nh\u1ea5t).<\/li>\n<li><strong>\u0110i\u1ec3m ch\u00ednh:<\/strong> T\u00ean l\u1edbp m\u00e0 n\u00f3 k\u1ebf th\u1eeba.<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5:<\/p>\n<pre><code>+---------------------+\n| order1 : \u0110\u01a1n h\u00e0ng        |\n+---------------------+\n| id: 9982            |\n| tr\u1ea1ng th\u00e1i: '\u0110\u00e3 thanh to\u00e1n'      |\n+---------------------+<\/code><\/pre>\n<p>N\u1ebfu t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb b\u1ecf qua, n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n \u1ea9n danh, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn vi\u1ec7c theo d\u00f5i c\u00e1c m\u1ed1i quan h\u1ec7 tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n<h3>2. Li\u00ean k\u1ebft c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng<\/h3>\n<p>C\u00e1c li\u00ean k\u1ebft \u0111\u1ea1i di\u1ec7n cho c\u00e1c m\u1ed1i quan h\u1ec7. Kh\u00e1c v\u1edbi c\u00e1c m\u1ed1i quan h\u1ec7 l\u1edbp mang t\u00ednh kh\u00e1i qu\u00e1t, c\u00e1c li\u00ean k\u1ebft \u0111\u1ed1i t\u01b0\u1ee3ng mang t\u00ednh c\u1ee5 th\u1ec3.<\/p>\n<ul>\n<li><strong>H\u01b0\u1edbng:<\/strong> C\u00e1c li\u00ean k\u1ebft c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t chi\u1ec1u ho\u1eb7c hai chi\u1ec1u.<\/li>\n<li><strong>Nh\u00e3n:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1nh nh\u00e3n cho li\u00ean k\u1ebft \u0111\u1ec3 m\u00f4 t\u1ea3 m\u1ed1i quan h\u1ec7 (v\u00ed d\u1ee5: \u2018s\u1edf h\u1eefu\u2019, \u2018qu\u1ea3n l\u00fd\u2019).<\/li>\n<li><strong>\u0110a d\u1ea1ng:<\/strong> M\u1ed9t \u0111\u1ea7u c\u1ee7a li\u00ean k\u1ebft c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb c\u00e1c r\u00e0ng bu\u1ed9c \u0111a d\u1ea1ng (v\u00ed d\u1ee5: \u20181\u2019, \u20180..*\u2019, \u20181..1\u2019).<\/li>\n<\/ul>\n<h3>3. Gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh<\/h3>\n<p>C\u00e1c thu\u1ed9c t\u00ednh \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong ph\u1ea7n th\u00e2n c\u1ee7a h\u1ed9p \u0111\u1ed1i t\u01b0\u1ee3ng. Kh\u00e1c v\u1edbi l\u1edbp, n\u01a1i c\u00e1c thu\u1ed9c t\u00ednh x\u00e1c \u0111\u1ecbnh ki\u1ec3u (v\u00ed d\u1ee5:<code>gi\u00e1: float<\/code>), c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng l\u1ea1i hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb (v\u00ed d\u1ee5:<code>gi\u00e1: 29.99<\/code>).<\/p>\n<p>Li\u1ec7t k\u00ea c\u00e1c gi\u00e1 tr\u1ecb kh\u00f4ng b\u1eaft bu\u1ed9c, nh\u01b0ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cao khi s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c t\u00ecnh hu\u1ed1ng g\u1ee1 l\u1ed7i ho\u1eb7c ki\u1ec3m th\u1eed. \u0110i\u1ec1u n\u00e0y ch\u1ee9ng minh r\u1eb1ng th\u1ec3 hi\u1ec7n tu\u00e2n th\u1ee7 tr\u1ea1ng th\u00e1i mong \u0111\u1ee3i.<\/p>\n<h2>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng so v\u1edbi s\u01a1 \u0111\u1ed3 l\u1edbp: So s\u00e1nh song song \ud83d\udcca<\/h2>\n<p>\u0110\u1ec3 l\u00e0m r\u00f5 h\u01a1n s\u1ef1 kh\u00e1c bi\u1ec7t, ch\u00fang ta c\u00f3 th\u1ec3 so s\u00e1nh hai lo\u1ea1i n\u00e0y song song v\u1edbi nhau. B\u1ea3ng n\u00e0y nh\u1ea5n m\u1ea1nh c\u00e1c kh\u00e1c bi\u1ec7t ch\u1ee9c n\u0103ng.<\/p>\n<table border=\"1\" cellpadding=\"8\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>S\u01a1 \u0111\u1ed3 l\u1edbp<\/th>\n<th>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Tr\u1ecdng t\u00e2m<\/strong><\/td>\n<td>M\u1eabu \/ B\u1ea3n v\u1ebd ph\u00e1c th\u1ea3o<\/td>\n<td>Th\u1ec3 hi\u1ec7n \/ B\u1ea3n ch\u1ee5p<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed1i c\u1ea3nh th\u1eddi gian<\/strong><\/td>\n<td>V\u0129nh vi\u1ec5n (C\u1ea5u tr\u00fac)<\/td>\n<td>Th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 (th\u1eddi gian ch\u1ea1y)<\/td>\n<\/tr>\n<tr>\n<td><strong>Thu\u1ed9c t\u00ednh<\/strong><\/td>\n<td>Hi\u1ec3n th\u1ecb ki\u1ec3u d\u1eef li\u1ec7u<\/td>\n<td>Hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb th\u1ef1c t\u1ebf<\/td>\n<\/tr>\n<tr>\n<td><strong>T\u00ean<\/strong><\/td>\n<td>T\u00ean l\u1edbp (v\u00ed d\u1ee5 nh\u01b0 <code>Ng\u01b0\u1eddi d\u00f9ng<\/code>)<\/td>\n<td>T\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng + L\u1edbp (v\u00ed d\u1ee5 nh\u01b0 <code>u1 : Ng\u01b0\u1eddi d\u00f9ng<\/code>)<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00e1ch s\u1eed d\u1ee5ng<\/strong><\/td>\n<td>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, T\u1ea1o l\u01b0\u1ee3c \u0111\u1ed3<\/td>\n<td>Ki\u1ec3m th\u1eed, G\u1ee1 l\u1ed7i, T\u00e0i li\u1ec7u h\u00f3a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>L\u01b0u \u00fd c\u00e1ch s\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 x\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. B\u1ea1n kh\u00f4ng th\u1ec3 c\u00f3 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u00f3 l\u1edbp, nh\u01b0ng b\u1ea1n c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t l\u1edbp m\u00e0 kh\u00f4ng bao gi\u1edd t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n<h2>Khi n\u00e0o b\u1ea1n n\u00ean s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng? \ud83c\udfaf<\/h2>\n<p>Kh\u00f4ng ph\u1ea3i d\u1ef1 \u00e1n n\u00e0o c\u0169ng c\u1ea7n s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. Vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a qu\u00e1 m\u1ee9c d\u1eabn \u0111\u1ebfn nh\u1eefng c\u01a1n \u00e1c m\u1ed9ng v\u1ec1 b\u1ea3o tr\u00ec. B\u1ea1n n\u00ean c\u00e2n nh\u1eafc th\u00eam ch\u00fang khi:<\/p>\n<ul>\n<li><strong>C\u00e1c m\u1ed1i quan h\u1ec7 ph\u1ee9c t\u1ea1p t\u1ed3n t\u1ea1i:<\/strong> Khi m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 c\u00e1c m\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111a m\u00e0 kh\u00f3 h\u00ecnh dung trong s\u01a1 \u0111\u1ed3 l\u1edbp, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u00e0m r\u00f5 c\u00e1c m\u1ed1i li\u00ean k\u1ebft c\u1ee5 th\u1ec3.<\/li>\n<li><strong>G\u1ee1 l\u1ed7i s\u1ef1 c\u1ed1 s\u1ea3n xu\u1ea5t:<\/strong> Khi x\u1ea3y ra l\u1ed7i, vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cho tr\u1ea1ng th\u00e1i t\u1ea1i th\u1eddi \u0111i\u1ec3m s\u1eadp h\u1ec7 th\u1ed1ng s\u1ebd gi\u00fap c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n hi\u1ec3u r\u00f5 lu\u1ed3ng d\u1eef li\u1ec7u.<\/li>\n<li><strong>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u00e0nh chu\u1ed7i\/Ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u t\u1eeb chu\u1ed7i:<\/strong> Khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u nh\u01b0 JSON ho\u1eb7c XML, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap \u00e1nh x\u1ea1 c\u1ea5u tr\u00fac th\u1eddi gian ch\u1ea1y sang c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n.<\/li>\n<li><strong>\u0110\u00e0o t\u1ea1o nh\u00e2n vi\u00ean m\u1edbi:<\/strong> C\u00e1c th\u00e0nh vi\u00ean m\u1edbi th\u01b0\u1eddng g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi c\u00e1c c\u1ea5u tr\u00fac l\u1edbp tr\u1eebu t\u01b0\u1ee3ng. Hi\u1ec3n th\u1ecb cho h\u1ecd m\u1ed9t v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 v\u1ec1 c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i s\u1ebd gi\u00fap h\u1ecd nhanh ch\u00f3ng l\u00e0m quen.<\/li>\n<li><strong>X\u00e1c minh l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u:<\/strong> Tr\u01b0\u1edbc khi tri\u1ec3n khai c\u01a1 s\u1edf d\u1eef li\u1ec7u, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 x\u00e1c minh r\u1eb1ng c\u00e1c m\u1ed1i quan h\u1ec7 \u0111\u1ec1 xu\u1ea5t h\u1ed7 tr\u1ee3 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n<h2>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh \u26a0\ufe0f<\/h2>\n<p>Ngay c\u1ea3 nh\u1eefng ng\u01b0\u1eddi m\u00f4 h\u00ecnh h\u00f3a c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ea7n l\u01b0u \u00fd.<\/p>\n<h3>1. Tr\u1ed9n l\u1eabn tr\u1ea1ng th\u00e1i v\u00e0 c\u1ea5u tr\u00fac<\/h3>\n<p>\u0110\u1eebng c\u1ed1 g\u1eafng th\u1ec3 hi\u1ec7n to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng trong m\u1ed9t s\u01a1 \u0111\u1ed3. N\u1ebfu b\u1ea1n th\u1ec3 hi\u1ec7n m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng thay \u0111\u1ed5i t\u1eeb \u2018M\u1edbi\u2019 sang \u2018\u0110\u00e3 b\u00e1n\u2019, b\u1ea1n \u0111ang l\u00e0m m\u1edd ranh gi\u1edbi gi\u1eefa m\u00f4 h\u00ecnh t\u0129nh v\u00e0 \u0111\u1ed9ng. H\u00e3y gi\u1eef n\u00f3 \u1edf tr\u1ea1ng th\u00e1i t\u0129nh.<\/p>\n<h3>2. B\u1ecf qua tham chi\u1ebfu r\u1ed7ng<\/h3>\n<p>Trong nhi\u1ec1u h\u1ec7 th\u1ed1ng, c\u00e1c li\u00ean k\u1ebft c\u00f3 th\u1ec3 l\u00e0 r\u1ed7ng. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00ean th\u1ec3 hi\u1ec7n r\u00f5 khi m\u1ed9t li\u00ean k\u1ebft v\u1eafng m\u1eb7t. N\u1ebfu \u0111\u1ed1i t\u01b0\u1ee3ng \u2018A\u2019 \u0111\u01b0\u1ee3c d\u1ef1 ki\u1ebfn li\u00ean k\u1ebft v\u1edbi \u2018B\u2019 nh\u01b0ng ch\u01b0a th\u1ef1c hi\u1ec7n, vi\u1ec7c b\u1ecf qua li\u00ean k\u1ebft l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, nh\u01b0ng ghi ch\u00fa r\u00f5 t\u00ednh ch\u1ea5t t\u00f9y ch\u1ecdn c\u1ee7a li\u00ean k\u1ebft s\u1ebd t\u1ed1t h\u01a1n.<\/p>\n<h3>3. G\u00e1n nh\u00e3n qu\u00e1 m\u1ee9c<\/h3>\n<p>Th\u00eam qu\u00e1 nhi\u1ec1u gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh s\u1ebd g\u00e2y l\u1ed9n x\u1ed9n. N\u1ebfu h\u1ec7 th\u1ed1ng c\u00f3 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi 50 thu\u1ed9c t\u00ednh, \u0111\u1eebng li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 trong s\u01a1 \u0111\u1ed3. Ch\u1ec9 li\u1ec7t k\u00ea nh\u1eefng thu\u1ed9c t\u00ednh quan tr\u1ecdng ph\u00f9 h\u1ee3p v\u1edbi ng\u1eef c\u1ea3nh hi\u1ec7n t\u1ea1i. D\u00f9ng d\u1ea5u ba ch\u1ea5m (\u2026) n\u1ebfu c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ec9 ra d\u1eef li\u1ec7u b\u1ecb b\u1ecf qua.<\/p>\n<h3>4. B\u1ecf qu\u00ean t\u00ednh k\u1ebf th\u1eeba<\/h3>\n<p>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng k\u1ebf th\u1eeba c\u1ea5u tr\u00fac t\u1eeb l\u1edbp. N\u1ebfu b\u1ea1n c\u00f3 m\u1ed9t l\u1edbp con \u2018PremiumUser\u2019 m\u1edf r\u1ed9ng t\u1eeb \u2018User\u2019, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i ph\u1ea3n \u00e1nh c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p n\u00e0y. H\u1ed9p \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i ch\u1ec9 r\u00f5 l\u1edbp con c\u1ee5 th\u1ec3 m\u00e0 n\u00f3 thu\u1ed9c v\u1ec1, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 l\u1edbp cha.<\/p>\n<h2>T\u00edch h\u1ee3p v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 kh\u00e1c \ud83d\udd17<\/h2>\n<p>S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng t\u1ed3n t\u1ea1i m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. Ch\u00fang ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t khi \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n UML kh\u00e1c.<\/p>\n<ul>\n<li><strong>V\u1edbi s\u01a1 \u0111\u1ed3 l\u1edbp:<\/strong>S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a c\u00e1c quy t\u1eafc, v\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 ki\u1ec3m tra t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a ch\u00fang tr\u01b0\u1edbc c\u00e1c t\u00ecnh hu\u1ed1ng d\u1eef li\u1ec7u th\u1ef1c t\u1ebf.<\/li>\n<li><strong>V\u1edbi s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1:<\/strong>S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 th\u1ec3 hi\u1ec7n lu\u1ed3ng tin nh\u1eafn. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cung c\u1ea5p c\u00e1i nh\u00ecn t\u0129nh v\u1ec1 c\u00e1c th\u00e0nh ph\u1ea7n nh\u1eadn nh\u1eefng tin nh\u1eafn \u0111\u00f3. Tham chi\u1ebfu s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng trong ti\u00eau \u0111\u1ec1 s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 gi\u00fap x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c c\u00e1c th\u1ec3 hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c g\u1ecdi.<\/li>\n<li><strong>V\u1edbi s\u01a1 \u0111\u1ed3 tr\u1ea1ng th\u00e1i:<\/strong>S\u01a1 \u0111\u1ed3 tr\u1ea1ng th\u00e1i th\u1ec3 hi\u1ec7n c\u00e1c chuy\u1ec3n ti\u1ebfp. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n tr\u1ea1ng th\u00e1i d\u1eef li\u1ec7u li\u00ean quan \u0111\u1ebfn t\u1eebng tr\u1ea1ng th\u00e1i. K\u1ebft h\u1ee3p ch\u00fang s\u1ebd cung c\u1ea5p b\u1ee9c tranh to\u00e0n di\u1ec7n v\u1ec1 h\u00e0nh vi c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn li\u00ean k\u1ebft n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c nh\u1ea5t qu\u00e1n. N\u1ebfu b\u1ea1n thay \u0111\u1ed5i m\u1ed9t l\u1edbp, b\u1ea1n ph\u1ea3i c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. N\u1ebfu b\u1ea1n thay \u0111\u1ed5i logic c\u1ee7a m\u1ed9t th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng, b\u1ea1n ph\u1ea3i c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 l\u1edbp.<\/p>\n<h2>C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u1ea1t th\u00e0nh c\u00f4ng trong m\u00f4 h\u00ecnh h\u00f3a \ud83c\udfc6<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n v\u1eabn h\u1eefu \u00edch theo th\u1eddi gian, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn sau.<\/p>\n<ul>\n<li><strong>Duy tr\u00ec t\u00ean g\u1ecdi nh\u1ea5t qu\u00e1n:<\/strong>\u0110\u1ea3m b\u1ea3o t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng trong s\u01a1 \u0111\u1ed3 kh\u1edbp v\u1edbi t\u00ean bi\u1ebfn trong m\u00e3 ngu\u1ed3n ho\u1eb7c l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m l\u1ed7i d\u1ecbch chuy\u1ec3n trong qu\u00e1 tr\u00ecnh tri\u1ec3n khai.<\/li>\n<li><strong>S\u1eed d\u1ee5ng m\u00e0u s\u1eafc m\u1ed9t c\u00e1ch ti\u1ebft ch\u1ebf:<\/strong>M\u1eb7c d\u00f9 m\u00e0u s\u1eafc c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t c\u00e1c lo\u1ea1i, h\u00e3y tr\u00e1nh d\u00f9ng qu\u00e1 nhi\u1ec1u m\u00e0u. Duy tr\u00ec m\u00e0u \u0111en v\u00e0 tr\u1eafng ti\u00eau chu\u1ea9n \u0111\u1ec3 t\u01b0\u01a1ng th\u00edch in \u1ea5n v\u00e0 \u0111\u01a1n gi\u1ea3n h\u00f3a. D\u00f9ng in \u0111\u1eadm \u0111\u1ec3 nh\u1ea5n m\u1ea1nh thay v\u00ec d\u00f9ng m\u00e0u.<\/li>\n<li><strong>Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 m\u00e3 ngu\u1ed3n. L\u01b0u tr\u1eef ch\u00fang trong h\u1ec7 th\u1ed1ng ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n c\u1ee7a b\u1ea1n. Nh\u1eefng thay \u0111\u1ed5i v\u00e0o s\u01a1 \u0111\u1ed3 c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t trong c\u00e1c y\u00eau c\u1ea7u h\u1ee3p nh\u1ea5t (pull requests), gi\u1ed1ng nh\u01b0 c\u00e1c thay \u0111\u1ed5i m\u00e3 ngu\u1ed3n.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf ph\u1ea1m vi:<\/strong>\u0110\u1eebng c\u1ed1 g\u1eafng v\u1ebd s\u01a1 \u0111\u1ed3 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng trong m\u1ed9t l\u1ea7n. Chia nh\u1ecf theo t\u1eebng module ho\u1eb7c t\u00ednh n\u0103ng. M\u1ed9t s\u01a1 \u0111\u1ed3 bao qu\u00e1t \u2018Module Thanh to\u00e1n\u2019 s\u1ebd h\u1eefu \u00edch h\u01a1n so v\u1edbi s\u01a1 \u0111\u1ed3 bao qu\u00e1t \u2018To\u00e0n b\u1ed9 \u1ee8ng d\u1ee5ng\u2019.<\/li>\n<li><strong>Xem x\u00e9t \u0111\u1ecbnh k\u1ef3:<\/strong>C\u00e1c m\u00f4 h\u00ecnh s\u1ebd l\u1ed7i th\u1eddi. L\u00ean l\u1ecbch xem x\u00e9t \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng v\u1eabn kh\u1edbp v\u1edbi tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng. N\u1ebfu m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i nh\u01b0ng s\u01a1 \u0111\u1ed3 kh\u00f4ng, s\u01a1 \u0111\u1ed3 s\u1ebd tr\u1edf th\u00e0nh g\u00e1nh n\u1eb7ng.<\/li>\n<\/ul>\n<h2>Hi\u1ec3u r\u00f5 t\u00ednh \u0111a d\u1ea1ng trong ng\u1eef c\u1ea3nh \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udd22<\/h2>\n<p>T\u00ednh \u0111a d\u1ea1ng l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m \u00e1p d\u1ee5ng m\u1ea1nh m\u1ebd v\u00e0o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 \u0111\u1ecbnh ngh\u0129a s\u1ed1 l\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t th\u1ec3 hi\u1ec7n kh\u00e1c.<\/p>\n<p>Trong s\u01a1 \u0111\u1ed3 l\u1edbp, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y m\u1ed9t k\u00fd hi\u1ec7u \u20181..*\u2019 tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng n\u1ed1i. Trong s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c d\u1ecbch th\u00e0nh m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng c\u1ee5 th\u1ec3 c\u00e1c li\u00ean k\u1ebft. V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u2018Kh\u00e1ch h\u00e0ng\u2019 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u2018\u0110\u01a1n h\u00e0ng\u2019 v\u1edbi b\u1ed9i s\u1ed1 \u20181..*\u2019, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3i th\u1ec3 hi\u1ec7n \u00edt nh\u1ea5t m\u1ed9t \u0111\u01b0\u1eddng \u0111\u01a1n h\u00e0ng k\u1ebft n\u1ed1i v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng.<\/p>\n<p>Vi ph\u1ea1m b\u1ed9i s\u1ed1 n\u00e0y trong s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cho th\u1ea5y m\u1ed9t khi\u1ebfm khuy\u1ebft trong thi\u1ebft k\u1ebf. V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t \u2018S\u1ea3n ph\u1ea9m\u2019 \u0111\u01b0\u1ee3c d\u1ef1 ki\u1ebfn ph\u1ea3i li\u00ean k\u1ebft v\u1edbi m\u1ed9t \u2018Nh\u00e0 cung c\u1ea5p\u2019 (1:1), nh\u01b0ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u1ea1i th\u1ec3 hi\u1ec7n \u2018S\u1ea3n ph\u1ea9m\u2019 li\u00ean k\u1ebft v\u1edbi ba \u0111\u1ed1i t\u01b0\u1ee3ng \u2018Nh\u00e0 cung c\u1ea5p\u2019 kh\u00e1c nhau, th\u00ec m\u00f4 h\u00ecnh n\u00e0y l\u00e0 kh\u00f4ng h\u1ee3p l\u1ec7.<\/p>\n<p>X\u00e1c minh c\u00e1c r\u00e0ng bu\u1ed9c n\u00e0y t\u1eeb s\u1edbm gi\u00fap ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u trong giai \u0111o\u1ea1n sau c\u1ee7a chu tr\u00ecnh ph\u00e1t tri\u1ec3n. \u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c ph\u00e2n t\u00edch t\u0129nh di\u1ec5n ra \u1edf c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf.<\/p>\n<h2>C\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf \u00e1p d\u1ee5ng \ud83c\udf0d<\/h2>\n<p>H\u00e3y c\u00f9ng xem c\u00e1ch th\u1ee9c n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c ng\u00e0nh kh\u00e1c nhau.<\/p>\n<ul>\n<li><strong>FinTech:<\/strong>Trong ng\u00e0nh ng\u00e2n h\u00e0ng, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a tr\u1ea1ng th\u00e1i giao d\u1ecbch. Ch\u00fang cho th\u1ea5y t\u00e0i kho\u1ea3n n\u00e0o b\u1ecb ghi n\u1ee3 v\u00e0 t\u00e0i kho\u1ea3n n\u00e0o b\u1ecb ghi c\u00f3 v\u00e0o th\u1eddi \u0111i\u1ec3m chuy\u1ec3n kho\u1ea3n. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng cho c\u00e1c b\u1ea3n ghi ki\u1ec3m to\u00e1n.<\/li>\n<li><strong>Y t\u1ebf:<\/strong>Trong c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd b\u1ec7nh nh\u00e2n, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u00e1nh x\u1ea1 h\u1ed3 s\u01a1 b\u1ec7nh nh\u00e2n \u0111\u1ebfn c\u00e1c ch\u1ea9n \u0111o\u00e1n v\u00e0 thu\u1ed1c \u0111i\u1ec1u tr\u1ecb c\u1ee5 th\u1ec3 c\u1ee7a h\u1ecd. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3 l\u1ecbch s\u1eed y t\u1ebf ph\u1ee9c t\u1ea1p.<\/li>\n<li><strong>Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed:<\/strong>\u0110\u1ed1i v\u1edbi gi\u1ecf h\u00e0ng, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap h\u00ecnh dung m\u1ed1i quan h\u1ec7 gi\u1eefa gi\u1ecf h\u00e0ng, c\u00e1c m\u1eb7t h\u00e0ng b\u00ean trong n\u00f3 v\u00e0 ng\u01b0\u1eddi d\u00f9ng s\u1edf h\u1eefu n\u00f3. \u0110i\u1ec1u n\u00e0y l\u00e0m r\u00f5 c\u00e1ch th\u1ee9c h\u00e0ng t\u1ed3n kho \u0111\u01b0\u1ee3c gi\u1eef l\u1ea1i.<\/li>\n<\/ul>\n<p>C\u00e1c t\u00ecnh hu\u1ed1ng n\u00e0y cho th\u1ea5y c\u00f4ng c\u1ee5 n\u00e0y r\u1ea5t linh ho\u1ea1t. N\u00f3 kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m tr\u1eebu t\u01b0\u1ee3ng; n\u00f3 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c cho b\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng n\u00e0o m\u00e0 m\u1ed1i quan h\u1ec7 d\u1eef li\u1ec7u l\u00e0 quan tr\u1ecdng.<\/p>\n<h2>Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 s\u1ef1 r\u00f5 r\u00e0ng trong m\u00f4 h\u00ecnh h\u00f3a \ud83d\udca1<\/h2>\n<p>Th\u00e0nh th\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c ghi nh\u1edb c\u00fa ph\u00e1p. \u0110\u00f3 l\u00e0 vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ti\u1ec1m n\u0103ng v\u00e0 th\u1ef1c t\u1ebf. \u0110\u00f3 l\u00e0 vi\u1ec7c bi\u1ebft khi n\u00e0o n\u00ean nh\u00ecn v\u00e0o b\u1ea3n v\u1ebd s\u01a1 \u0111\u1ed3 v\u00e0 khi n\u00e0o n\u00ean nh\u00ecn v\u00e0o t\u00f2a nh\u00e0 th\u1ef1c t\u1ebf.<\/p>\n<p>B\u1eb1ng c\u00e1ch tr\u00e1nh nh\u1eefng hi\u1ec3u l\u1ea7m \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn trong h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3 trong c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u00e2y c\u1ea7u n\u1ed1i gi\u1eefa thi\u1ebft k\u1ebf tr\u1eebu t\u01b0\u1ee3ng v\u00e0 tri\u1ec3n khai c\u1ee5 th\u1ec3. Khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch, ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t t\u1ea5m l\u01b0\u1edbi an to\u00e0n cho t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u.<\/p>\n<p>B\u1eaft \u0111\u1ea7u t\u1eeb nh\u1ecf. Ch\u1ecdn m\u1ed9t module ph\u1ee9c t\u1ea1p trong d\u1ef1 \u00e1n hi\u1ec7n t\u1ea1i c\u1ee7a b\u1ea1n. V\u1ebd s\u01a1 \u0111\u1ed3 l\u1edbp. Sau \u0111\u00f3, v\u1ebd s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cho m\u1ed9t tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3. So s\u00e1nh ch\u00fang. Nh\u1eadn ra s\u1ef1 kh\u00e1c bi\u1ec7t. Th\u1ef1c h\u00e0nh n\u00e0y s\u1ebd c\u1ee7ng c\u1ed1 hi\u1ec3u bi\u1ebft c\u1ee7a b\u1ea1n nhanh h\u01a1n b\u1ea5t k\u1ef3 nghi\u00ean c\u1ee9u l\u00fd thuy\u1ebft n\u00e0o.<\/p>\n<p>H\u00e3y nh\u1edb, m\u1ee5c ti\u00eau c\u1ee7a m\u00f4 h\u00ecnh h\u00f3a l\u00e0 giao ti\u1ebfp. N\u1ebfu s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n gi\u00fap \u0111\u1ed3ng nghi\u1ec7p hi\u1ec3u c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, th\u00ec n\u00f3 \u0111\u00e3 th\u00e0nh c\u00f4ng. H\u00e3y gi\u1eef n\u00f3 \u0111\u01a1n gi\u1ea3n, ch\u00ednh x\u00e1c v\u00e0 lu\u00f4n c\u1eadp nh\u1eadt.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c hi\u1ec3u c\u00e1ch c\u00e1c th\u1ee9 ho\u1ea1t \u0111\u1ed9ng. N\u00f3 \u0111\u00f2i h\u1ecfi ph\u1ea3i bi\u1ebft c\u00e1ch c\u00e1c th\u1ee9 t\u1ed3n&hellip;<\/p>\n","protected":false},"author":1,"featured_media":1500,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML: B\u00f3c t\u00e1ch nh\u1eefng hi\u1ec3u l\u1ea7m d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u \ud83d\udcca","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch t\u1ea1o s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng UML m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. 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