自己练手写的一个String类，包含基本功能，测试通过，当个纪念，希望对别人也能有点帮助-His practice as a handwritten String class that contains the basic functions of the test, when a memorial, in the hope others can also be helpful to
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001560s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.072934s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000959s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001105s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000962s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003063s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000826s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003805s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014653s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001184s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 130433 [ RunTime:0.012905s ]
