（1）该码功能是将数组后n为一次放在数组前面，不改变其他元素顺序；
（2）用二分法求方程的根。-(1) of the code after the function is an array on an array of n for the first time in front of the other elements do not change the order (2) equation for the root of the dichotomy.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001362s ]
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:0.090708s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001581s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001888s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001564s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003814s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001082s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003220s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014467s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001330s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 295346 [ RunTime:0.001485s ]
