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  • The open and closed principle (OCP) and the single responsibility (SRP) do not understand the difference.

    Many people on use calculator examples to illustrate these two principles, but it seems that the difference is that OCP has an abstract class, while SRP does not inherit abstraction compared with SRP, OCP, the examples of 1.OCP are all independent of...

  • MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
    MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b37f1e-2c0eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
    MySQL Errno : 1021
    Message : Disk full (/tmp/#sql-temptable-64f5-1b37f1e-2c0eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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