sorting - Related information

  • Article sort, according to each user's habits to recommend different articles, how to consider performance?

    rule (the result of formula calculation is the ranking of topic heat): : I would like to ask how such a requirement can reduce the consumption of server performance, can you tell me about the solution? ...

  • JavaScript mixed string sort

    demand: an array Each element of the array is a string The string may be empty, that is, " " sort the array with special characters first and strings of length 0 first, that is, the example in requirement 3, followed by underscores. Other sp...

  • 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-e35cd4-4deb.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-e35cd4-4deb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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