大约有 47,000 项符合查询结果（耗时：0.0531秒） [XML]
Random record in ActiveRecord
...e current record count) as an offset.
offset = rand(Model.count)
# Rails 4
rand_record = Model.offset(offset).first
# Rails 3
rand_record = Model.first(:offset => offset)
To be honest, I've just been using ORDER BY RAND() or RANDOM() (depending on the database). It's not a performance issue ...
How do I create a comma-separated list from an array in PHP?
...
answered Mar 12 '10 at 19:24
ryeguyryeguy
58.7k4949 gold badges181181 silver badges254254 bronze badges
...
What do I need to read to understand how git works? [closed]
... |
edited Oct 15 '14 at 3:17
Iain
2,3901919 silver badges2424 bronze badges
answered Nov 4 '08 at...
Ruby's ||= (or equals) in JavaScript?
...
|
edited Oct 24 '17 at 11:52
Syed Aslam
8,15955 gold badges3737 silver badges5353 bronze badges
...
how perform grep operation on all files in a directory
...
answered Feb 4 '15 at 19:19
RobRob
10.1k66 gold badges3333 silver badges5050 bronze badges
...
When do I use the PHP constant “PHP_EOL”?
... |
edited Feb 21 '18 at 14:02
Félix Gagnon-Grenier
6,92299 gold badges4242 silver badges5454 bronze badges
...
How to convert all tables from MyISAM into InnoDB?
...
174
<?php
// connect your database here first
//
// Actual code starts here
...
Use Font Awesome Icon As Favicon
...
RenanRenan
8,39944 gold badges3535 silver badges5858 bronze badges
...