{"id":476247,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:19","modified_gmt":"2023-09-05T11:12:19","slug":"class-based-programming","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/class-based-programming\/","title":{"rendered":"L\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp"},"content":{"rendered":"

L\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 l\u1eadp tr\u00ecnh h\u01b0\u1edbng l\u1edbp ho\u1eb7c h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOP), l\u00e0 m\u1ed9t m\u00f4 h\u00ecnh ph\u1ed5 bi\u1ebfn trong ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i. N\u00f3 cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u1ea5u tr\u00fac ph\u1ea7n m\u1ec1m c\u1ee7a h\u1ecd xung quanh c\u00e1c th\u1ef1c th\u1ec3 trong th\u1ebf gi\u1edbi th\u1ef1c, cho ph\u00e9p s\u1eed d\u1ee5ng l\u1ea1i m\u00e3, \u0111\u00f3ng g\u00f3i, k\u1ebf th\u1eeba v\u00e0 \u0111a h\u00ecnh.<\/p>\n

L\u1ecbch s\u1eed v\u00e0 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

Kh\u00e1i ni\u1ec7m l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u b\u1edfi c\u00e1c nh\u00e0 khoa h\u1ecdc m\u00e1y t\u00ednh ng\u01b0\u1eddi Na Uy Ole-Johan Dahl v\u00e0 Kristen Nygaard v\u00e0o nh\u1eefng n\u0103m 1960 v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00f4n ng\u1eef Simula, \u0111\u01b0\u1ee3c coi l\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ea7u ti\u00ean. Tuy nhi\u00ean, ph\u1ea3i \u0111\u1ebfn khi Smalltalk \u0111\u01b0\u1ee3c ph\u00e1t h\u00e0nh v\u00e0o nh\u1eefng n\u0103m 1970 b\u1edfi nh\u00f3m Xerox PARC do Alan Kay \u0111\u1ee9ng \u0111\u1ea7u th\u00ec ch\u01b0\u01a1ng tr\u00ecnh l\u1eadp tr\u00ecnh theo l\u1edbp m\u1edbi th\u1ef1c s\u1ef1 b\u1eaft \u0111\u1ea7u thu h\u00fat \u0111\u01b0\u1ee3c s\u1ef1 ch\u00fa \u00fd.<\/p>\n

Trong nh\u1eefng th\u1eadp k\u1ef7 sau \u0111\u00f3, l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n ch\u00ednh c\u1ee7a c\u00f4ng ngh\u1ec7 ph\u1ea7n m\u1ec1m, v\u1edbi nhi\u1ec1u ng\u00f4n ng\u1eef ph\u1ed5 bi\u1ebfn nh\u1ea5t hi\u1ec7n nay\u2014bao g\u1ed3m Java, C++ v\u00e0 Python\u2014k\u1ebft h\u1ee3p c\u00e1c nguy\u00ean t\u1eafc c\u1ee7a n\u00f3.<\/p>\n

\u0110i s\u00e2u v\u00e0o l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

Trong l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp, l\u1edbp l\u00e0 m\u1ed9t b\u1ea3n thi\u1ebft k\u1ebf ho\u1eb7c m\u1ed9t m\u1eabu m\u00f4 t\u1ea3 c\u00e1c h\u00e0nh vi v\u00e0 tr\u1ea1ng th\u00e1i m\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng thu\u1ed9c lo\u1ea1i c\u1ee7a n\u00f3 h\u1ed7 tr\u1ee3. M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t l\u1edbp. V\u00ed d\u1ee5: n\u1ebfu b\u1ea1n c\u00f3 m\u1ed9t l\u1edbp t\u00ean l\u00e0 '\u00d4 t\u00f4', c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp n\u00e0y c\u00f3 th\u1ec3 l\u00e0 'Toyota', 'Honda', v.v. M\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 c\u00f3 c\u00e1c gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh duy nh\u1ea5t nh\u01b0ng t\u1ea5t c\u1ea3 ch\u00fang \u0111\u1ec1u tu\u00e2n theo c\u1ea5u tr\u00fac do l\u1edbp c\u1ee7a ch\u00fang x\u00e1c \u0111\u1ecbnh.<\/p>\n

C\u00e1c nguy\u00ean t\u1eafc ch\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp bao g\u1ed3m:<\/p>\n

    \n
  1. \n

    \u0110\u00f3ng g\u00f3i<\/strong>: \u0110\u00e2y l\u00e0 g\u00f3i d\u1eef li\u1ec7u v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ho\u1ea1t \u0111\u1ed9ng tr\u00ean d\u1eef li\u1ec7u n\u00e0y th\u00e0nh m\u1ed9t \u0111\u01a1n v\u1ecb duy nh\u1ea5t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n<\/li>\n

  2. \n

    Di s\u1ea3n<\/strong>: \u0110i\u1ec1u n\u00e0y cho ph\u00e9p t\u1ea1o ra c\u00e1c ph\u00e2n lo\u1ea1i theo th\u1ee9 b\u1eadc. N\u1ebfu c\u00f3 m\u1ed9t l\u1edbp 'Ph\u01b0\u01a1ng ti\u1ec7n', th\u00ec l\u1edbp '\u00d4 t\u00f4' c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1eaft ngu\u1ed3n t\u1eeb l\u1edbp \u0111\u00f3, k\u1ebf th\u1eeba t\u1ea5t c\u1ea3 c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a n\u00f3.<\/p>\n<\/li>\n

  3. \n

    \u0110a h\u00ecnh<\/strong>: \u0110i\u1ec1u n\u00e0y cho ph\u00e9p m\u1ed9t giao di\u1ec7n th\u1ec3 hi\u1ec7n m\u1ed9t l\u1edbp h\u00e0nh \u0111\u1ed9ng chung. \u0110\u00f3 l\u00e0 kh\u1ea3 n\u0103ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau ph\u1ea3n h\u1ed3i theo m\u1ed9t c\u00e1ch ri\u00eang \u0111\u1ed1i v\u1edbi c\u00f9ng m\u1ed9t th\u00f4ng \u0111i\u1ec7p.<\/p>\n<\/li>\n

  4. \n

    Tr\u1eebu t\u01b0\u1ee3ng<\/strong>: \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch \u1ea9n c\u00e1c chi ti\u1ebft kh\u00f4ng li\u00ean quan v\u00e0 ch\u1ec9 hi\u1ec3n th\u1ecb th\u00f4ng tin c\u1ea7n thi\u1ebft.<\/p>\n<\/li>\n<\/ol>\n

    Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

    D\u01b0\u1edbi l\u1edbp v\u1ecf b\u1ecdc, c\u00e1c l\u1edbp x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong b\u1ed9 nh\u1edb, v\u1edbi m\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee9a b\u1ea3n sao tr\u01b0\u1eddng d\u1eef li\u1ec7u c\u1ee7a l\u1edbp \u0111\u00f3. Khi m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c g\u1ecdi tr\u00ean m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, ph\u01b0\u01a1ng th\u1ee9c t\u01b0\u01a1ng \u1ee9ng c\u1ee7a l\u1edbp \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi v\u1edbi c\u00e1c tr\u01b0\u1eddng d\u1eef li\u1ec7u c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0m ng\u1eef c\u1ea3nh.<\/p>\n

    C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

    C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp l\u00e0 \u0111\u00f3ng g\u00f3i, k\u1ebf th\u1eeba, \u0111a h\u00ecnh v\u00e0 tr\u1eebu t\u01b0\u1ee3ng. Ch\u00fang t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c t\u1ed5 ch\u1ee9c m\u00e3, kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng l\u1ea1i m\u00e3, b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u00e0 b\u1ea3o tr\u00ec ph\u1ea7n m\u1ec1m. Ch\u00fang c\u0169ng cho ph\u00e9p ph\u00e1t tri\u1ec3n c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p theo c\u00e1ch m\u00f4-\u0111un, trong \u0111\u00f3 m\u1ed7i m\u00f4-\u0111un c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0 th\u1eed nghi\u1ec7m \u0111\u1ed9c l\u1eadp tr\u01b0\u1edbc khi \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi c\u00e1c m\u00f4-\u0111un kh\u00e1c.<\/p>\n

    C\u00e1c lo\u1ea1i l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

    L\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong v\u00f4 s\u1ed1 ng\u00f4n ng\u1eef, m\u1ed7i ng\u00f4n ng\u1eef tri\u1ec3n khai m\u00f4 h\u00ecnh theo nh\u1eefng c\u00e1ch h\u01a1i kh\u00e1c nhau. M\u1ed9t s\u1ed1 trong s\u1ed1 n\u00e0y bao g\u1ed3m:<\/p>\n\n\n\n\n\n\n\n\n\n
    Ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh<\/th>\nT\u00ednh n\u0103ng n\u1ed5i b\u1eadt<\/th>\n<\/tr>\n<\/thead>\n
    Java<\/td>\nHo\u00e0n to\u00e0n h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, m\u1ecdi th\u1ee9 \u0111\u1ec1u l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng ngo\u1ea1i tr\u1eeb c\u00e1c ki\u1ec3u nguy\u00ean th\u1ee7y<\/td>\n<\/tr>\n
    C++<\/td>\nK\u1ebft h\u1ee3p l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 l\u1eadp tr\u00ecnh th\u1ee7 t\u1ee5c<\/td>\n<\/tr>\n
    Python<\/td>\nH\u1ed7 tr\u1ee3 nhi\u1ec1u m\u00f4 h\u00ecnh, bao g\u1ed3m ch\u1ee9c n\u0103ng v\u00e0 th\u1ee7 t\u1ee5c, b\u00ean c\u1ea1nh m\u00f4 h\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/td>\n<\/tr>\n
    h\u1ed3ng ng\u1ecdc<\/td>\nM\u1ecdi th\u1ee9 \u0111\u1ec1u l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, ngay c\u1ea3 nh\u1eefng ki\u1ec3u nguy\u00ean th\u1ee7y<\/td>\n<\/tr>\n
    C#<\/td>\n\u0110\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Microsoft, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong .NET framework<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    S\u1eed d\u1ee5ng l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp: V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n

    L\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp l\u00e0 m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1nh m\u1ebd nh\u01b0ng kh\u00f4ng ph\u1ea3i kh\u00f4ng c\u00f3 nh\u1eefng th\u00e1ch th\u1ee9c. N\u00f3 \u0111\u00f2i h\u1ecfi thi\u1ebft k\u1ebf c\u1ea9n th\u1eadn \u0111\u1ec3 tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd, h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p k\u1ebf th\u1eeba l\u1edbn v\u00e0 c\u00e1c l\u1edbp c\u00f3 qu\u00e1 nhi\u1ec1u tr\u00e1ch nhi\u1ec7m. Tuy nhi\u00ean, nh\u1eefng \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u b\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf nh\u01b0 nguy\u00ean t\u1eafc SOLID v\u00e0 s\u1eed d\u1ee5ng c\u00e1c m\u1eabu thi\u1ebft k\u1ebf.<\/p>\n

    So s\u00e1nh v\u1edbi c\u00e1c m\u00f4 h\u00ecnh t\u01b0\u01a1ng t\u1ef1<\/h2>\n

    Trong khi l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp l\u00e0 ph\u1ed5 bi\u1ebfn, v\u1eabn c\u00f3 nh\u1eefng m\u00f4 h\u00ecnh l\u1eadp tr\u00ecnh kh\u00e1c. V\u00ed d\u1ee5, l\u1eadp tr\u00ecnh th\u1ee7 t\u1ee5c t\u1ed5 ch\u1ee9c m\u00e3 th\u00e0nh c\u00e1c th\u1ee7 t\u1ee5c, trong khi l\u1eadp tr\u00ecnh h\u00e0m tr\u00e1nh thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i v\u00e0 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 thay \u0111\u1ed5i.<\/p>\n\n\n\n\n\n\n\n
    M\u00f4 h\u00ecnh l\u1eadp tr\u00ecnh<\/th>\nC\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n
    th\u1ee7 t\u1ee5c<\/td>\nCh\u01b0\u01a1ng tr\u00ecnh l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c th\u1ee7 t\u1ee5c ho\u1eb7c ch\u01b0\u01a1ng tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
    D\u1ef1a tr\u00ean l\u1edbp<\/td>\nCh\u01b0\u01a1ng tr\u00ecnh l\u00e0 t\u1eadp h\u1ee3p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c<\/td>\n<\/tr>\n
    ch\u1ee9c n\u0103ng<\/td>\nT\u00ednh to\u00e1n \u0111\u01b0\u1ee3c coi l\u00e0 vi\u1ec7c \u0111\u00e1nh gi\u00e1 c\u00e1c h\u00e0m to\u00e1n h\u1ecdc, tr\u00e1nh vi\u1ec7c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i v\u00e0 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 thay \u0111\u1ed5i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    T\u01b0\u01a1ng lai c\u1ee7a l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

    B\u1ea5t ch\u1ea5p s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh kh\u00e1c nh\u01b0 l\u1eadp tr\u00ecnh ch\u1ee9c n\u0103ng v\u00e0 ph\u1ea3n \u1ee9ng, l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp v\u1eabn l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong b\u1ed1i c\u1ea3nh l\u1eadp tr\u00ecnh. C\u00e1c ng\u00f4n ng\u1eef hi\u1ec7n \u0111\u1ea1i \u0111ang c\u00f3 xu h\u01b0\u1edbng h\u01b0\u1edbng t\u1edbi c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn \u0111a m\u00f4 h\u00ecnh, k\u1ebft h\u1ee3p d\u1ef1a tr\u00ean l\u1edbp c\u00f9ng v\u1edbi c\u00e1c m\u00f4 h\u00ecnh kh\u00e1c.<\/p>\n

    H\u01a1n n\u1eefa, l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp \u0111ang \u0111\u01b0\u1ee3c n\u00e2ng cao b\u1edfi c\u00e1c kh\u00e1i ni\u1ec7m m\u1edbi h\u01a1n nh\u01b0 L\u1eadp tr\u00ecnh h\u01b0\u1edbng theo kh\u00eda c\u1ea1nh (AOP) cung c\u1ea5p c\u00e1ch s\u1eeda \u0111\u1ed5i h\u00e0nh vi c\u1ee7a c\u00e1c l\u1edbp v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ed9t c\u00e1ch linh ho\u1ea1t.<\/p>\n

    M\u00e1y ch\u1ee7 proxy v\u00e0 l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp<\/h2>\n

    M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i r\u1ea5t nhi\u1ec1u t\u1eeb vi\u1ec7c l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp. Trong h\u1ec7 th\u1ed1ng m\u00e1y ch\u1ee7 proxy, c\u00e1c lo\u1ea1i proxy kh\u00e1c nhau\u2014HTTP, SOCKS, v.v.\u2014c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng c\u00e1c l\u1edbp, k\u1ebf th\u1eeba t\u1eeb l\u1edbp Proxy c\u01a1 s\u1edf. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng m\u00f4-\u0111un, c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng d\u1ec5 d\u00e0ng. C\u00e1c nguy\u00ean t\u1eafc \u0111\u00f3ng g\u00f3i v\u00e0 \u0111a h\u00ecnh cho ph\u00e9p x\u1eed l\u00fd c\u00e1c g\u00f3i d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 linh ho\u1ea1t.<\/p>\n

    Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n

    \u0110\u1ec3 \u0111\u1ecdc th\u00eam v\u00e0 t\u00ecm t\u00e0i nguy\u00ean, h\u00e3y xem c\u00e1c li\u00ean k\u1ebft sau:<\/p>\n

      \n
    1. C\u00e1c kh\u00e1i ni\u1ec7m l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: Oracle<\/a><\/li>\n
    2. L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: T\u00e0i li\u1ec7u Python<\/a><\/li>\n
    3. T\u00ecm hi\u1ec3u l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng trong C++<\/a><\/li>\n
    4. L\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng trong Java<\/a><\/li>\n
    5. Nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/a><\/li>\n<\/ol>\n

      T\u1eeb bu\u1ed5i b\u00ecnh minh c\u1ee7a Simula cho \u0111\u1ebfn c\u00e1c ng\u00f4n ng\u1eef ti\u00ean ti\u1ebfn, \u0111a m\u00f4 h\u00ecnh ng\u00e0y nay, l\u1eadp tr\u00ecnh d\u1ef1a tr\u00ean l\u1edbp \u0111\u00e3 ch\u1ee9ng t\u1ecf m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn m\u00e3 h\u00f3a l\u00e2u d\u00e0i v\u00e0 linh ho\u1ea1t. \u1ee8ng d\u1ee5ng c\u1ee7a n\u00f3 v\u00e0o c\u00e1c kh\u00eda c\u1ea1nh c\u00f4ng ngh\u1ec7 kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 m\u00e1y ch\u1ee7 proxy, ch\u1ee9ng th\u1ef1c t\u00ednh ti\u1ec7n \u00edch v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng c\u1ee7a n\u00f3 khi \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng th\u00e1ch th\u1ee9c t\u00ednh to\u00e1n ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n.<\/p>","protected":false},"featured_media":467863,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476247","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Class-based Programming: A Comprehensive Overview<\/mark>","faq_items":[{"question":"What is class-based programming?","answer":"

      Class-based programming, also known as class-oriented or object-oriented programming (OOP), is a programming paradigm that allows developers to structure their software around real-world entities. This approach enables code reusability, encapsulation, inheritance, and polymorphism.<\/p>"},{"question":"Who introduced class-based programming?","answer":"

      The concept of class-based programming was first introduced by Norwegian computer scientists Ole-Johan Dahl and Kristen Nygaard in the 1960s with the development of the Simula language.<\/p>"},{"question":"What are the key principles of class-based programming?","answer":"

      The key principles of class-based programming include encapsulation, inheritance, polymorphism, and abstraction. These principles allow for effective code organization, reusability, data protection, and easier software maintenance.<\/p>"},{"question":"How does class-based programming work?","answer":"

      In class-based programming, a class is a blueprint that defines the behaviors and states that objects of its type support. When a method is called on an object, the class's corresponding method is executed with the object's data fields as context.<\/p>"},{"question":"What are the types of class-based programming languages?","answer":"

      Class-based programming is implemented in many languages, including Java, C++, Python, Ruby, and C#. Each of these languages implements the class-based paradigm in slightly different ways.<\/p>"},{"question":"What problems can arise from using class-based programming and how can they be mitigated?","answer":"

      Potential challenges in class-based programming include tight coupling, large inheritance hierarchies, and classes with too many responsibilities. These problems can be mitigated by following sound design principles such as the SOLID principles and using design patterns.<\/p>"},{"question":"How does class-based programming compare to other programming paradigms?","answer":"

      While class-based programming organizes programs as a collection of interacting objects, procedural programming organizes code into procedures that manipulate data, and functional programming treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data.<\/p>"},{"question":"How can class-based programming be used in the context of proxy servers?","answer":"

      In a proxy server system, different types of proxies\u2014HTTP, SOCKS, etc.\u2014can be represented as classes, inheriting from a base Proxy class. The principles of encapsulation and polymorphism enable secure and flexible handling of data packets, respectively.<\/p>"},{"question":"What is the future of class-based programming?","answer":"

      Despite the rise of other paradigms like functional and reactive programming, class-based programming remains a crucial part of the programming landscape. It is expected to continue evolving, incorporating new concepts such as Aspect-Oriented Programming (AOP), and continuing to play a significant role in multi-paradigm languages.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476247\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/467863"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}