{"id":3497,"date":"2026-03-26T17:19:26","date_gmt":"2026-03-26T09:19:26","guid":{"rendered":"https:\/\/www.go2posts.com\/vi\/spotting-fixing-object-oriented-code-smells\/"},"modified":"2026-03-26T17:19:26","modified_gmt":"2026-03-26T09:19:26","slug":"spotting-fixing-object-oriented-code-smells","status":"publish","type":"post","link":"https:\/\/www.go2posts.com\/vi\/spotting-fixing-object-oriented-code-smells\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn OOAD: Ph\u00e1t hi\u1ec7n v\u00e0 S\u1eeda ch\u1eefa M\u00f9i V\u1ea5n \u0110\u1ec1 M\u00e3 Ngu\u1ed3n H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng"},"content":{"rendered":"

Ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. Khi c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n, \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a m\u00e3 ngu\u1ed3n n\u1ec1n t\u1ea3ng c\u0169ng t\u0103ng theo. Trong Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng, vi\u1ec7c duy tr\u00ec m\u1ed9t c\u1ea5u tr\u00fac s\u1ea1ch l\u00e0 \u0111i\u1ec1u t\u1ed1i quan tr\u1ecdng. M\u1ed9t m\u00f9i m\u00e3 ngu\u1ed3n kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ed7i g\u00e2y s\u1eadp h\u1ec7 th\u1ed1ng; \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u b\u1ec1 m\u1eb7t cho th\u1ea5y m\u1ed9t v\u1ea5n \u0111\u1ec1 s\u00e2u xa trong thi\u1ebft k\u1ebf. Nh\u1eefng d\u1ea5u hi\u1ec7u n\u00e0y cho th\u1ea5y c\u1ea5u tr\u00fac n\u1ec1n t\u1ea3ng c\u00f3 th\u1ec3 \u0111ang l\u1ec7ch kh\u1ecfi c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn n\u1ee3 k\u1ef9 thu\u1eadt. Hi\u1ec3u c\u00e1ch ph\u00e1t hi\u1ec7n nh\u1eefng t\u00edn hi\u1ec7u n\u00e0y v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p s\u1eeda ch\u1eefa c\u1ee5 th\u1ec3 l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec m\u00e3 ngu\u1ed3n l\u00e2u d\u00e0i.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 b\u1ea3n ch\u1ea5t c\u1ee7a c\u00e1c m\u00f9i m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 n\u00eau chi ti\u1ebft c\u00e1c m\u1eabu ph\u1ed5 bi\u1ebfn, t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang l\u00ean h\u1ec7 th\u1ed1ng, v\u00e0 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c th\u1ef1c t\u1ebf \u0111\u1ec3 t\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n. M\u1ee5c ti\u00eau l\u00e0 c\u1ea3i thi\u1ec7n s\u1ee9c kh\u1ecfe c\u1ee7a c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n m\u00e0 kh\u00f4ng l\u00e0m gi\u00e1n \u0111o\u1ea1n ch\u1ee9c n\u0103ng.<\/p>\n

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\"Line<\/figure>\n<\/div>\n

T\u1ea1i sao M\u00f9i M\u00e3 Ngu\u1ed3n L\u1ea1i Quan Tr\u1ecdng \ud83d\udcb8<\/h2>\n

B\u1ecf qua c\u00e1c m\u00f9i m\u00e3 ngu\u1ed3n th\u01b0\u1eddng c\u1ea3m gi\u00e1c nh\u01b0 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c th\u1eddi gian trong ng\u1eafn h\u1ea1n. Tuy nhi\u00ean, c\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y s\u1ebd t\u00edch l\u0169y theo th\u1eddi gian. M\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u1ea7y m\u00f9i m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean mong manh. Nh\u1eefng thay \u0111\u1ed5i v\u1ed1n ch\u1ec9 c\u1ea7n v\u00e0i ph\u00fat c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n th\u00e0nh c\u1ea3 ng\u00e0y c\u00f4ng vi\u1ec7c. Chi ph\u00ed b\u1ea3o tr\u00ec t\u0103ng theo c\u1ea5p s\u1ed1 nh\u00e2n khi m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean \u00edt tr\u1ef1c quan h\u01a1n.<\/p>\n

C\u00f3 m\u1ed9t s\u1ed1 l\u00fd do \u0111\u1ec3 \u01b0u ti\u00ean ch\u1ea5t l\u01b0\u1ee3ng m\u00e3 ngu\u1ed3n:<\/p>\n

    \n
  • Kh\u1ea3 n\u0103ng \u0111\u1ecdc hi\u1ec3u:<\/strong>M\u00e3 ngu\u1ed3n s\u1ea1ch d\u1ec5 hi\u1ec3u h\u01a1n \u0111\u1ed1i v\u1edbi c\u00e1c th\u00e0nh vi\u00ean m\u1edbi trong nh\u00f3m.<\/li>\n
  • Kh\u1ea3 n\u0103ng ki\u1ec3m th\u1eed:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac t\u1ed1t h\u01a1n d\u1ec5 t\u00e1ch bi\u1ec7t v\u00e0 ki\u1ec3m th\u1eed h\u01a1n.<\/li>\n
  • Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong>Thi\u1ebft k\u1ebf v\u1eefng ch\u1eafc cho ph\u00e9p th\u00eam t\u00ednh n\u0103ng m\u1edbi v\u1edbi t\u00e1c \u0111\u1ed9ng ph\u1ee5 t\u1ed1i thi\u1ec3u.<\/li>\n
  • Hi\u1ec7u su\u1ea5t:<\/strong>M\u1eb7c d\u00f9 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng tr\u1ef1c ti\u1ebfp, nh\u01b0ng c\u00e1c thi\u1ebft k\u1ebf k\u00e9m hi\u1ec7u qu\u1ea3 th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn vi\u1ec7c t\u1ea1o ra v\u00e0 x\u1eed l\u00fd \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n

    Khi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n nh\u1eadn ra m\u1ed9t m\u00f9i m\u00e3 ngu\u1ed3n, h\u1ecd \u0111ang x\u00e1c \u0111\u1ecbnh m\u1ed9t c\u01a1 h\u1ed9i c\u1ee5 th\u1ec3 \u0111\u1ec3 c\u1ea3i thi\u1ec7n ki\u1ebfn tr\u00fac. C\u00e1ch ti\u1ebfp c\u1eadn ch\u1ee7 \u0111\u1ed9ng n\u00e0y ng\u0103n ng\u1eeba s\u1ef1 t\u00edch t\u1ee5 c\u1ee7a n\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n

    Danh m\u1ee5c C\u00e1c M\u00f9i M\u00e3 Ngu\u1ed3n OOP Ph\u1ed5 Bi\u1ebfn \ud83d\udccb<\/h2>\n

    C\u00f3 r\u1ea5t nhi\u1ec1u m\u00f9i m\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong t\u00e0i li\u1ec7u tham kh\u1ea3o. M\u1eb7c d\u00f9 t\u00ean g\u1ecdi c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 kh\u00e1c nhau, nh\u01b0ng c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ed1t l\u00f5i v\u1eabn gi\u1eef nguy\u00ean. B\u1ea3ng sau t\u00f3m t\u1eaft nh\u1eefng vi ph\u1ea1m ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c h\u1ec7 th\u1ed1ng h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
    M\u00f9i M\u00e3 Ngu\u1ed3n<\/th>\nTri\u1ec7u ch\u1ee9ng ch\u00ednh<\/th>\nM\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n
    L\u1edbp Th\u1ea7n<\/td>\nM\u1ed9t l\u1edbp th\u1ef1c hi\u1ec7n qu\u00e1 nhi\u1ec1u vi\u1ec7c.<\/td>\nCao<\/td>\n<\/tr>\n
    Ph\u01b0\u01a1ng th\u1ee9c d\u00e0i<\/td>\nM\u1ed9t h\u00e0m duy nh\u1ea5t qu\u00e1 l\u1edbn.<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
    Th\u00e8m mu\u1ed1n t\u00ednh n\u0103ng<\/td>\nM\u1ed9t ph\u01b0\u01a1ng th\u1ee9c s\u1eed d\u1ee5ng d\u1eef li\u1ec7u c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c m\u1ed9t c\u00e1ch qu\u00e1 m\u1ee9c.<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
    Thay \u0111\u1ed5i ph\u00e2n k\u1ef3<\/td>\nM\u1ed9t l\u1edbp thay \u0111\u1ed5i v\u00ec nhi\u1ec1u l\u00fd do kh\u00e1c nhau.<\/td>\nCao<\/td>\n<\/tr>\n
    Ph\u1eabu thu\u1eadt s\u00fang tr\u01b0\u1eddng<\/td>\nM\u1ed9t thay \u0111\u1ed5i y\u00eau c\u1ea7u ch\u1ec9nh s\u1eeda \u1edf nhi\u1ec1u l\u1edbp.<\/td>\nCao<\/td>\n<\/tr>\n
    L\u1edbp d\u1eef li\u1ec7u<\/td>\nM\u1ed9t l\u1edbp ch\u1ec9 l\u01b0u tr\u1eef d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u00f3 h\u00e0nh vi.<\/td>\nTh\u1ea5p<\/td>\n<\/tr>\n
    C\u00e1c c\u1ea5p \u0111\u1ed9 k\u1ebf th\u1eeba song song<\/td>\nHai c\u1ea5u tr\u00fac k\u1ebf th\u1eeba l\u1edbp ph\u1ea3i \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt c\u00f9ng nhau.<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
    L\u1edbp tr\u00ec ho\u00e3n<\/td>\nM\u1ed9t l\u1edbp l\u00e0m \u00edt \u0111i\u1ec1u c\u00f3 gi\u00e1 tr\u1ecb.<\/td>\nTh\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Vi\u1ec7c nh\u1eadn di\u1ec7n c\u00e1c m\u1eabu n\u00e0y s\u1edbm gi\u00fap c\u00e1c nh\u00f3m gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh \u0111i\u1ec3m ngh\u1ebdn nghi\u00eam tr\u1ecdng. H\u00e3y c\u00f9ng xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng nh\u1eefng d\u1ea5u hi\u1ec7u nghi\u00eam tr\u1ecdng nh\u1ea5t.<\/p>\n

    Ph\u00e2n t\u00edch s\u00e2u: Ba \u0111i\u1ec1u quan tr\u1ecdng nh\u1ea5t \ud83e\uddd0<\/h2>\n

    M\u1eb7c d\u00f9 t\u1ed3n t\u1ea1i nhi\u1ec1u d\u1ea5u hi\u1ec7u, ba danh m\u1ee5c th\u01b0\u1eddng xuy\u00ean g\u00e2y ra s\u1ef1 c\u1ed1 nghi\u00eam tr\u1ecdng nh\u1ea5t trong c\u00e1c d\u1ef1 \u00e1n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110\u00f3 l\u00e0 L\u1edbp Th\u01b0\u1ee3ng \u0110\u1ebf, Ph\u01b0\u01a1ng th\u1ee9c D\u00e0i v\u00e0 Ghen T\u1ecb T\u00ednh N\u0103ng.<\/p>\n

    1. L\u1edbp Th\u01b0\u1ee3ng \u0110\u1ebf \u2620\ufe0f<\/h3>\n

    L\u1edbp Th\u01b0\u1ee3ng \u0110\u1ebf l\u00e0 m\u1ed9t module bi\u1ebft ho\u1eb7c ki\u1ec3m so\u00e1t g\u1ea7n nh\u01b0 m\u1ecdi th\u1ee9 trong h\u1ec7 th\u1ed1ng. N\u00f3 th\u01b0\u1eddng x\u1eed l\u00fd vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u, logic kinh doanh v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng t\u1ea5t c\u1ea3 trong m\u1ed9t n\u01a1i. \u0110i\u1ec1u n\u00e0y vi ph\u1ea1m Nguy\u00ean t\u1eafc Tr\u00e1ch nhi\u1ec7m \u0110\u01a1n nh\u1ea5t.<\/p>\n

    Tri\u1ec7u ch\u1ee9ng:<\/strong><\/p>\n

      \n
    • T\u1ec7p l\u1edbp qu\u00e1 d\u00e0i.<\/li>\n
    • N\u00f3 c\u00f3 h\u00e0ng tr\u0103m ph\u01b0\u01a1ng th\u1ee9c v\u00e0 tr\u01b0\u1eddng.<\/li>\n
    • C\u00e1c l\u1edbp kh\u00e1c ph\u1ee5 thu\u1ed9c m\u1ea1nh v\u00e0o th\u1ef1c th\u1ec3 duy nh\u1ea5t n\u00e0y.<\/li>\n
    • N\u00f3 kh\u00f3 ki\u1ec3m th\u1eed do c\u00e1c ph\u1ee5 thu\u1ed9c c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n

      Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n

      T\u00e1i c\u1ea5u tr\u00fac L\u1edbp Th\u01b0\u1ee3ng \u0110\u1ebf \u0111\u00f2i h\u1ecfi c\u00e1ch ti\u1ebfp c\u1eadn ph\u1eabu thu\u1eadt. \u0110\u1eebng x\u00f3a l\u1edbp ngay l\u1eadp t\u1ee9c. Thay v\u00e0o \u0111\u00f3, tr\u00edch xu\u1ea5t c\u00e1c tr\u00e1ch nhi\u1ec7m ri\u00eang bi\u1ec7t v\u00e0o c\u00e1c l\u1edbp m\u1edbi.<\/p>\n

        \n
      • Tr\u00edch xu\u1ea5t l\u1edbp:<\/strong>Nh\u00f3m c\u00e1c ph\u01b0\u01a1ng th\u1ee9c v\u00e0 tr\u01b0\u1eddng li\u00ean quan v\u00e0o c\u00e1c l\u1edbp ri\u00eang bi\u1ec7t.<\/li>\n
      • \u1ee6y quy\u1ec1n:<\/strong>Chuy\u1ec3n logic t\u1eeb L\u1edbp Th\u01b0\u1ee3ng \u0110\u1ebf sang c\u00e1c l\u1edbp m\u1edbi.<\/li>\n
      • C\u1eadp nh\u1eadt Tham chi\u1ebfu:<\/strong>\u0110\u1ea3m b\u1ea3o c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng g\u1ecdi c\u00e1c l\u1edbp m\u1edbi thay v\u00ec l\u1edbp Th\u1ea7n.<\/li>\n<\/ul>\n

        2. Ph\u01b0\u01a1ng th\u1ee9c d\u00e0i \ud83d\udcdc<\/h3>\n

        M\u1ed9t ph\u01b0\u01a1ng th\u1ee9c d\u00e0i l\u00e0 m\u1ed9t h\u00e0m qu\u00e1 ph\u1ee9c t\u1ea1p \u0111\u1ec3 hi\u1ec3u ch\u1ec9 trong m\u1ed9t c\u00e1i nh\u00ecn. N\u00f3 th\u01b0\u1eddng ch\u1ee9a nhi\u1ec1u b\u01b0\u1edbc ri\u00eang bi\u1ec7t m\u00e0 n\u00ean \u0111\u01b0\u1ee3c t\u00e1ch th\u00e0nh c\u00e1c th\u1ef1c th\u1ec3 ri\u00eang bi\u1ec7t. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng \u0111\u1ecdc v\u00e0 khi\u1ebfn vi\u1ec7c ki\u1ec3m th\u1eed \u0111\u01a1n v\u1ecb tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n

        Tri\u1ec7u ch\u1ee9ng:<\/strong><\/p>\n

          \n
        • Ph\u01b0\u01a1ng th\u1ee9c v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng s\u1ed1 d\u00f2ng nh\u1ea5t \u0111\u1ecbnh.<\/li>\n
        • N\u00f3 th\u1ef1c hi\u1ec7n nhi\u1ec1u thao t\u00e1c logic kh\u00e1c nhau.<\/li>\n
        • N\u00f3 y\u00eau c\u1ea7u m\u1ee9c \u0111\u1ed9 th\u1ee5t l\u1ec1 s\u00e2u.<\/li>\n
        • R\u1ea5t kh\u00f3 thay \u0111\u1ed5i m\u1ed9t ph\u1ea7n m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ph\u1ea7n kh\u00e1c.<\/li>\n<\/ul>\n

          Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n

          Chi\u1ebfn l\u01b0\u1ee3c ch\u00ednh l\u00e0 tr\u00edch xu\u1ea5t ph\u01b0\u01a1ng th\u1ee9c. Chia nh\u1ecf h\u00e0m l\u1edbn th\u00e0nh c\u00e1c h\u00e0m nh\u1ecf h\u01a1n, c\u00f3 t\u00ean r\u00f5 r\u00e0ng.<\/p>\n

            \n
          • X\u00e1c \u0111\u1ecbnh c\u00e1c b\u01b0\u1edbc:<\/strong>T\u00ecm c\u00e1c kh\u1ed1i logic b\u00ean trong ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n
          • Tr\u00edch xu\u1ea5t:<\/strong>Chuy\u1ec3n m\u1ed7i kh\u1ed1i v\u00e0o m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c ri\u00eang bi\u1ec7t.<\/li>\n
          • \u0110\u1eb7t t\u00ean r\u00f5 r\u00e0ng:<\/strong>G\u00e1n cho c\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u1edbi t\u00ean m\u00f4 t\u1ea3 h\u00e0nh vi c\u1ee7a ch\u00fang.<\/li>\n
          • Lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p:<\/strong>N\u1ebfu m\u1ed9t kh\u1ed1i \u0111\u01b0\u1ee3c sao ch\u00e9p \u1edf n\u01a1i kh\u00e1c, h\u00e3y t\u1ea1o m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c chung.<\/li>\n<\/ul>\n

            \u0110i\u1ec1u n\u00e0y khi\u1ebfn ph\u01b0\u01a1ng th\u1ee9c ban \u0111\u1ea7u tr\u1edf th\u00e0nh b\u1ea3n t\u00f3m t\u1eaft c\u1ea5p cao c\u1ee7a quy tr\u00ecnh, c\u1ea3i thi\u1ec7n t\u00ednh r\u00f5 r\u00e0ng.<\/p>\n

            3. Ghen t\u1ecb t\u00ednh n\u0103ng \ud83d\ude12<\/h3>\n

            Ghen t\u1ecb t\u00ednh n\u0103ng x\u1ea3y ra khi m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c trong m\u1ed9t l\u1edbp d\u00e0nh ph\u1ea7n l\u1edbn th\u1eddi gian truy c\u1eadp d\u1eef li\u1ec7u t\u1eeb m\u1ed9t l\u1edbp kh\u00e1c. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y ph\u01b0\u01a1ng th\u1ee9c c\u00f3 th\u1ec3 thu\u1ed9c v\u1ec1 l\u1edbp m\u00e0 n\u00f3 \u0111ang truy c\u1eadp.<\/p>\n

            Tri\u1ec7u ch\u1ee9ng:<\/strong><\/p>\n

              \n
            • M\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ecdc nhi\u1ec1u thu\u1ed9c t\u00ednh c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c.<\/li>\n
            • N\u00f3 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p t\u00ednh b\u1eb1ng d\u1eef li\u1ec7u \u0111\u00f3.<\/li>\n
            • Logic b\u1ecb ch\u00f4n v\u00f9i trong m\u1ed9t l\u1edbp kh\u00f4ng s\u1edf h\u1eefu d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

              Gi\u1ea3i ph\u00e1p:<\/strong><\/p>\n

              Chuy\u1ec3n ph\u01b0\u01a1ng th\u1ee9c sang l\u1edbp s\u1edf h\u1eefu d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Di chuy\u1ec3n Ph\u01b0\u01a1ng th\u1ee9c.<\/p>\n

                \n
              • Ph\u00e2n t\u00edch S\u1eed d\u1ee5ng:<\/strong>Ki\u1ec3m tra l\u1edbp n\u00e0o cung c\u1ea5p d\u1eef li\u1ec7u m\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n.<\/li>\n
              • Chuy\u1ec3n logic:<\/strong>Chuy\u1ec3n ph\u01b0\u01a1ng th\u1ee9c sang l\u1edbp \u0111\u00f3.<\/li>\n
              • C\u1eadp nh\u1eadt ng\u01b0\u1eddi g\u1ecdi:<\/strong>Thay \u0111\u1ed5i m\u00e3 g\u1ecdi \u0111\u1ec3 g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c tr\u00ean ch\u1ee7 s\u1edf h\u1eefu m\u1edbi.<\/li>\n<\/ul>\n

                N\u1ebfu ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n d\u1eef li\u1ec7u t\u1eeb c\u1ea3 hai l\u1edbp, h\u00e3y c\u00e2n nh\u1eafc t\u1ea1o m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng bao b\u1ecdc ho\u1eb7c \u0111\u1ed1i t\u01b0\u1ee3ng t\u1ed5ng h\u1ee3p \u0111\u1ec3 l\u01b0u tr\u1eef tr\u1ea1ng th\u00e1i \u0111\u00f3.<\/p>\n

                C\u00e1c k\u1ef9 thu\u1eadt refactoring \ud83d\udee0\ufe0f<\/h2>\n

                S\u1eeda c\u00e1c m\u00f9i code \u0111\u00f2i h\u1ecfi c\u00e1c k\u1ef9 thu\u1eadt refactoring c\u1ee5 th\u1ec3. \u0110\u00e2y l\u00e0 nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n, gi\u1eef nguy\u00ean h\u00e0nh vi nh\u01b0ng c\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c thi\u1ebft y\u1ebfu.<\/p>\n

                Tr\u00edch xu\u1ea5t ph\u01b0\u01a1ng th\u1ee9c<\/h3>\n

                \u0110\u00e2y l\u00e0 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn nh\u1ea5t. N\u00f3 bao g\u1ed3m vi\u1ec7c l\u1ea5y m\u1ed9t kh\u1ed1i m\u00e3 b\u00ean trong m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c v\u00e0 di chuy\u1ec3n n\u00f3 sang m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c m\u1edbi. Ph\u01b0\u01a1ng th\u1ee9c ban \u0111\u1ea7u sau \u0111\u00f3 g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c m\u1edbi. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p.<\/p>\n

                Bao b\u1ecdc tr\u01b0\u1eddng<\/h3>\n

                C\u00e1c tr\u01b0\u1eddng c\u00f4ng khai l\u00e0 ngu\u1ed3n g\u00e2y r\u00e0ng bu\u1ed9c. Chuy\u1ec3n c\u00e1c tr\u01b0\u1eddng th\u00e0nh ri\u00eang t\u01b0 v\u00e0 cung c\u1ea5p c\u00e1c truy c\u1eadp c\u00f4ng khai cho ph\u00e9p ki\u1ec3m tra v\u00e0 thay \u0111\u1ed5i trong t\u01b0\u01a1ng lai m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng ng\u01b0\u1eddi g\u1ecdi. \u0110i\u1ec1u n\u00e0y b\u1ea3o v\u1ec7 tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

                Thay th\u1ebf \u0111i\u1ec1u ki\u1ec7n b\u1eb1ng t\u00ednh \u0111a h\u00ecnh<\/h3>\n

                C\u00e1c c\u00e2u l\u1ec7nh switch v\u00e0 kh\u1ed1i if-else l\u1edbn th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a m\u00f9i code. N\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c h\u00e0nh x\u1eed kh\u00e1c nhau d\u1ef1a tr\u00ean lo\u1ea1i \u0111\u1ed1i t\u01b0\u1ee3ng, h\u00e3y s\u1eed d\u1ee5ng t\u00ednh \u0111a h\u00ecnh. T\u1ea1o m\u1ed9t l\u1edbp con cho m\u1ed7i h\u00e0nh vi v\u00e0 ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c. \u0110i\u1ec1u n\u00e0y lo\u1ea1i b\u1ecf logic \u0111i\u1ec1u ki\u1ec7n.<\/p>\n

                N\u00e2ng ph\u01b0\u01a1ng th\u1ee9c l\u00ean<\/h3>\n

                N\u1ebfu hai l\u1edbp con chia s\u1ebb c\u00f9ng m\u1ed9t \u0111o\u1ea1n m\u00e3, \u0111o\u1ea1n m\u00e3 \u0111\u00f3 c\u00f3 kh\u1ea3 n\u0103ng thu\u1ed9c v\u1ec1 l\u1edbp cha. Di chuy\u1ec3n ph\u01b0\u01a1ng th\u1ee9c l\u00ean c\u1ea5p \u0111\u1ed9 k\u1ebf th\u1eeba. \u0110i\u1ec1u n\u00e0y gi\u1ea3m s\u1ef1 tr\u00f9ng l\u1eb7p.<\/p>\n

                \u0110\u1ea9y ph\u01b0\u01a1ng th\u1ee9c xu\u1ed1ng<\/h3>\n

                Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi m\u1ed9t l\u1edbp con, h\u00e3y di chuy\u1ec3n n\u00f3 xu\u1ed1ng l\u1edbp c\u1ee5 th\u1ec3 \u0111\u00f3. \u0110i\u1ec1u n\u00e0y gi\u00fap l\u1edbp cha s\u1ea1ch s\u1ebd v\u00e0 t\u1eadp trung v\u00e0o c\u00e1c \u0111i\u1ec3m chung.<\/p>\n

                Nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf nh\u01b0 nh\u1eefng t\u1ea5m khi\u00ean \ud83d\udee1\ufe0f<\/h2>\n

                Refactoring s\u1eeda ch\u1eefa c\u00e1c tri\u1ec7u ch\u1ee9ng, nh\u01b0ng c\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf ng\u0103n ng\u1eeba m\u00f9i code m\u1edbi. Tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1ea1o n\u00ean n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc.<\/p>\n

                Nguy\u00ean t\u1eafc SOLID<\/h3>\n
                  \n
                • Nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t:<\/strong>M\u1ed9t l\u1edbp ch\u1ec9 n\u00ean c\u00f3 m\u1ed9t l\u00fd do \u0111\u1ec3 thay \u0111\u1ed5i.<\/li>\n
                • M\u1edf\/\u0110\u00f3ng:<\/strong>C\u00e1c th\u1ef1c th\u1ec3 ph\u1ea7n m\u1ec1m n\u00ean \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng nh\u01b0ng \u0111\u00f3ng \u0111\u1ed1i v\u1edbi thay \u0111\u1ed5i.<\/li>\n
                • Thay th\u1ebf Liskov:<\/strong>C\u00e1c ki\u1ec3u con ph\u1ea3i c\u00f3 th\u1ec3 thay th\u1ebf cho ki\u1ec3u c\u01a1 s\u1edf c\u1ee7a ch\u00fang.<\/li>\n
                • Ph\u00e2n t\u00e1ch giao di\u1ec7n:<\/strong>Kh\u00e1ch h\u00e0ng kh\u00f4ng n\u00ean b\u1ecb \u00e9p ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c giao di\u1ec7n m\u00e0 h\u1ecd kh\u00f4ng s\u1eed d\u1ee5ng.<\/li>\n
                • \u0110\u1ea3o ng\u01b0\u1ee3c ph\u1ee5 thu\u1ed9c:<\/strong>Ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1eebu t\u01b0\u1ee3ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i v\u00e0o c\u1ee5 th\u1ec3.<\/li>\n<\/ul>\n

                  Nguy\u00ean t\u1eafc DRY<\/h3>\n

                  \u0110\u1eebng l\u1eb7p l\u1ea1i ch\u00ednh m\u00ecnh. N\u1ebfu b\u1ea1n th\u1ea5y c\u00f9ng m\u1ed9t \u0111o\u1ea1n m\u00e3 xu\u1ea5t hi\u1ec7n \u1edf hai n\u01a1i, h\u00e3y tr\u00edch xu\u1ea5t n\u00f3 v\u00e0o m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c l\u1edbp chung. S\u1ef1 tr\u00f9ng l\u1eb7p l\u00e0 nguy\u00ean nh\u00e2n c\u1ee7a nhi\u1ec1u m\u00f9i m\u00e3 ngu\u1ed3n, bao g\u1ed3m c\u1ea3 Ph\u1eabu thu\u1eadt s\u00fang tr\u01b0\u1eddng.<\/p>\n

                  Nguy\u00ean t\u1eafc KISS<\/h3>\n

                  Gi\u1eef \u0111\u01a1n gi\u1ea3n, ngu ng\u1ed1c. C\u00e1c thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p kh\u00f3 b\u1ea3o tr\u00ec h\u01a1n. H\u00e3y ch\u1ecdn gi\u1ea3i ph\u00e1p \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u. Vi\u1ec7c thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn nh\u1eefng m\u00f9i m\u00e3 ngu\u1ed3n m\u1edbi.<\/p>\n

                  Ph\u00e1t hi\u1ec7n t\u1ef1 \u0111\u1ed9ng \u2699\ufe0f<\/h2>\n

                  M\u1eb7c d\u00f9 vi\u1ec7c ki\u1ec3m tra th\u1ee7 c\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb, c\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng c\u00f3 th\u1ec3 gi\u00fap ph\u00e1t hi\u1ec7n m\u00f9i m\u00e3 ngu\u1ed3n \u1edf quy m\u00f4 l\u1edbn. C\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch t\u0129nh qu\u00e9t m\u00e3 ngu\u1ed3n m\u00e0 kh\u00f4ng c\u1ea7n th\u1ef1c thi n\u00f3. Ch\u00fang t\u00ecm ki\u1ebfm c\u00e1c m\u1eabu kh\u1edbp v\u1edbi \u0111\u1ecbnh ngh\u0129a m\u00f9i m\u00e3 ngu\u1ed3n \u0111\u00e3 bi\u1ebft.<\/p>\n

                  C\u00e1c ch\u1ec9 s\u1ed1 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n bao g\u1ed3m:<\/p>\n

                    \n
                  • \u0110\u1ed9 ph\u1ee9c t\u1ea1p v\u00f2ng l\u1eb7p:<\/strong>\u0110o l\u01b0\u1eddng s\u1ed1 l\u01b0\u1ee3ng c\u00e1c \u0111\u01b0\u1eddng \u0111i \u0111\u1ed9c l\u1eadp tuy\u1ebfn t\u00ednh qua m\u00e3 ngu\u1ed3n ch\u01b0\u01a1ng tr\u00ecnh.<\/li>\n
                  • S\u1ef1 li\u00ean k\u1ebft:<\/strong>M\u1ee9c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c l\u1eabn nhau gi\u1eefa c\u00e1c m\u00f4-\u0111un ph\u1ea7n m\u1ec1m.<\/li>\n
                  • T\u00ednh g\u1eafn k\u1ebft:<\/strong>M\u1ee9c \u0111\u1ed9 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong m\u1ed9t m\u00f4-\u0111un thu\u1ed9c v\u1ec1 nhau.<\/li>\n
                  • \u0110\u1ed9 s\u00e2u c\u1ee7a c\u00e2y k\u1ebf th\u1eeba:<\/strong>S\u1ed1 l\u01b0\u1ee3ng m\u1ee9c t\u1ed1i \u0111a trong c\u1ea5u tr\u00fac k\u1ebf th\u1eeba l\u1edbp.<\/li>\n<\/ul>\n

                    T\u00edch h\u1ee3p c\u00e1c c\u00f4ng c\u1ee5 n\u00e0y v\u00e0o lu\u1ed3ng x\u00e2y d\u1ef1ng \u0111\u1ea3m b\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c duy tr\u00ec li\u00ean t\u1ee5c. C\u00e1c th\u00f4ng b\u00e1o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u1ec3 c\u1ea3nh b\u00e1o nh\u00e0 ph\u00e1t tri\u1ec3n khi m\u1ed9t m\u00f9i m\u00e3 ngu\u1ed3n \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o.<\/p>\n

                    X\u00e2y d\u1ef1ng v\u0103n h\u00f3a ch\u1ea5t l\u01b0\u1ee3ng \ud83c\udf31<\/h2>\n

                    Ch\u1ea5t l\u01b0\u1ee3ng k\u1ef9 thu\u1eadt kh\u00f4ng ch\u1ec9 l\u00e0 tr\u00e1ch nhi\u1ec7m c\u1ee7a m\u1ed9t ng\u01b0\u1eddi. N\u00f3 \u0111\u00f2i h\u1ecfi m\u1ed9t v\u0103n h\u00f3a \u0111\u1ed9i nh\u00f3m coi tr\u1ecdng kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec. Ki\u1ec3m tra m\u00e3 ngu\u1ed3n l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf then ch\u1ed1t cho \u0111i\u1ec1u n\u00e0y.<\/p>\n

                    Ki\u1ec3m tra b\u1edfi \u0111\u1ed3ng nghi\u1ec7p<\/h3>\n

                    Trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra m\u00e3 ngu\u1ed3n, c\u00e1c th\u00e0nh vi\u00ean trong \u0111\u1ed9i t\u00ecm ki\u1ebfm c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 thi\u1ebft k\u1ebf, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u1ed7i c\u00fa ph\u00e1p. H\u1ecd \u0111\u1eb7t c\u00e2u h\u1ecfi v\u1ec1 m\u1ee5c \u0111\u00edch v\u00e0 c\u00e1c thay \u0111\u1ed5i trong t\u01b0\u01a1ng lai. Qu\u00e1 tr\u00ecnh h\u1ee3p t\u00e1c n\u00e0y gi\u00fap lan t\u1ecfa ki\u1ebfn th\u1ee9c v\u1ec1 thi\u1ebft k\u1ebf t\u1ed1t.<\/p>\n

                    T\u00e1i c\u1ea5u tr\u00fac li\u00ean t\u1ee5c<\/h3>\n

                    T\u00e1i c\u1ea5u tr\u00fac n\u00ean tr\u1edf th\u00e0nh th\u00f3i quen, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t giai \u0111o\u1ea1n. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n n\u00ean d\u1ecdn d\u1eb9p m\u00e3 ngu\u1ed3n khi l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c t\u00ednh n\u0103ng. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n danh s\u00e1ch n\u1ee3 k\u1ef9 thu\u1eadt tr\u1edf n\u00ean kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c.<\/p>\n

                    T\u00e0i li\u1ec7u<\/h3>\n

                    T\u00e0i li\u1ec7u r\u00f5 r\u00e0ng gi\u00fap gi\u1ea3i th\u00edch *t\u1ea1i sao* m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c \u0111\u01b0a ra. \u0110i\u1ec1u n\u00e0y ng\u0103n c\u1ea3n c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u01b0\u01a1ng lai l\u00f9i l\u1ea1i c\u00e1c thay \u0111\u1ed5i t\u1ed1t ho\u1eb7c \u0111\u01b0a v\u00e0o nh\u1eefng m\u00f9i m\u00e3 ngu\u1ed3n m\u1edbi do hi\u1ec3u nh\u1ea7m.<\/p>\n

                    Ch\u1ec9 s\u1ed1 \u0111o l\u01b0\u1eddng th\u00e0nh c\u00f4ng \ud83d\udcca<\/h2>\n

                    L\u00e0m sao b\u1ea1n bi\u1ebft n\u1ed7 l\u1ef1c t\u00e1i c\u1ea5u tr\u00fac c\u1ee7a m\u00ecnh c\u00f3 hi\u1ec7u qu\u1ea3 kh\u00f4ng? Theo d\u00f5i c\u00e1c ch\u1ec9 s\u1ed1 c\u1ee5 th\u1ec3 theo th\u1eddi gian.<\/p>\n

                      \n
                    • T\u1ef7 l\u1ec7 l\u1ed7i:<\/strong>S\u1ef1 gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng l\u1ed7i cho th\u1ea5y thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n.<\/li>\n
                    • Th\u1eddi gian d\u1eabn \u0111\u1ea7u:<\/strong>Th\u1eddi gian tri\u1ec3n khai t\u00ednh n\u0103ng nhanh h\u01a1n cho th\u1ea5y s\u1ef1 linh ho\u1ea1t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/li>\n
                    • Ph\u1ea1m vi ki\u1ec3m th\u1eed:<\/strong>Ph\u1ea1m vi ki\u1ec3m th\u1eed cao th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn t\u00ednh ph\u00e2n m\u1ea3nh t\u1ed1t h\u01a1n.<\/li>\n
                    • S\u1ed1 l\u01b0\u1ee3ng m\u00f9i h\u00f4i:<\/strong>Xu h\u01b0\u1edbng gi\u1ea3m d\u1ea7n c\u1ea3nh b\u00e1o ph\u00e2n t\u00edch t\u0129nh.<\/li>\n<\/ul>\n

                      Vi\u1ec7c th\u01b0\u1eddng xuy\u00ean xem x\u00e9t c\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y gi\u00fap duy tr\u00ec s\u1ef1 t\u1eadp trung v\u00e0o s\u1ee9c kh\u1ecfe l\u00e2u d\u00e0i. N\u00f3 chuy\u1ec3n cu\u1ed9c tr\u00f2 chuy\u1ec7n t\u1eeb \u201cn\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng ngay b\u00e2y gi\u1edd kh\u00f4ng?\u201d sang \u201cn\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u n\u0103m t\u1edbi kh\u00f4ng?\u201d.<\/p>\n

                      K\u1ebft lu\u1eadn<\/h2>\n

                      Nh\u1eefng m\u00f9i h\u00f4i trong m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o. Ch\u00fang cho th\u1ea5y thi\u1ebft k\u1ebf \u0111ang ch\u1ecbu \u00e1p l\u1ef1c do \u0111\u1ed9 ph\u1ee9c t\u1ea1p. B\u1eb1ng c\u00e1ch nh\u1eadn di\u1ec7n nh\u1eefng m\u1eabu n\u00e0y v\u00e0 \u00e1p d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt tinh ch\u1ec9nh c\u00f3 m\u1ee5c ti\u00eau, c\u00e1c \u0111\u1ed9i ng\u0169 c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c tr\u1eadt t\u1ef1. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt v\u00e0 cam k\u1ebft v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng. Tuy nhi\u00ean, l\u1ee3i \u00edch thu \u0111\u01b0\u1ee3c l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng d\u1ec5 hi\u1ec3u, d\u1ec5 ki\u1ec3m th\u1eed v\u00e0 d\u1ec5 m\u1edf r\u1ed9ng h\u01a1n. \u01afu ti\u00ean s\u1ee9c kh\u1ecfe m\u00e3 ngu\u1ed3n l\u00e0 m\u1ed9t kho\u1ea3n \u0111\u1ea7u t\u01b0 v\u00e0o t\u01b0\u01a1ng lai c\u1ee7a ph\u1ea7n m\u1ec1m.<\/p>\n","protected":false},"excerpt":{"rendered":"

                      Ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. Khi c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n, \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a m\u00e3 ngu\u1ed3n n\u1ec1n t\u1ea3ng c\u0169ng t\u0103ng theo. Trong Ph\u00e2n t\u00edch…<\/p>\n","protected":false},"author":1,"featured_media":3498,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn ph\u00e1t hi\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c m\u00f9i h\u00f4i m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udd0d","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch nh\u1eadn di\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c m\u00f9i h\u00f4i m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00e2ng cao kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng thi\u1ebft k\u1ebf b\u1eb1ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c tinh ch\u1ec9nh th\u1ef1c t\u1ebf.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[105],"tags":[103,104],"class_list":["post-3497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-object-oriented-analysis-and-design","tag-academic","tag-object-oriented-analysis-and-design"],"yoast_head":"\nH\u01b0\u1edbng d\u1eabn ph\u00e1t hi\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c m\u00f9i h\u00f4i m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udd0d<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch nh\u1eadn di\u1ec7n v\u00e0 kh\u1eafc ph\u1ee5c m\u00f9i h\u00f4i m\u00e3 ngu\u1ed3n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. 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