大约有 42,000 项符合查询结果（耗时：0.0550秒） [XML]
jQuery to retrieve and set selected option value of html select element
...
|
edited Aug 3 '09 at 12:18
answered Aug 3 '09 at 12:07
...
PHP Get Site URL Protocol - http vs https
...
70
It is not automatic. Your top function looks ok.
...
How unique is UUID?
...
470
Very safe:
the annual risk of a given person being hit by a meteorite is
estimated to be ...
C++ static virtual members?
...
answered Nov 30 '09 at 15:30
Adam RosenfieldAdam Rosenfield
347k9090 gold badges477477 silver badges564564 bronze badges
...
Java String array: is there a size of method?
...
Yes, .length (property-like, not a method):
String[] array = new String[10];
int size = array.length;
share
|
improve this answer
|
follow
|
...
MySQL Workbench: How to keep the connection alive
Error Code: 2013. Lost connection to MySQL server during query
9 Answers
9
...
How do I catch an Ajax query post error?
...
310
Since jQuery 1.5 you can use the deferred objects mechanism:
$.post('some.php', {name: 'John'})...
How do I properly clean up Excel interop objects?
...
answered Oct 1 '08 at 17:30
VVSVVS
18.3k33 gold badges3838 silver badges6262 bronze badges
...
SQL command to display history of queries
...
|
edited Jun 10 '14 at 6:36
Baby Groot
4,5391212 gold badges4848 silver badges6767 bronze badges
...
Rails: select unique values from a column
...rails 5+
Model.distinct.pluck(:rating)
Update
Apparently, as of rails 5.0.0.1, it works only on "top level" queries, like above. Doesn't work on collection proxies ("has_many" relations, for example).
Address.distinct.pluck(:city) # => ['Moscow']
user.addresses.distinct.pluck(:city) # => [...