大约有 42,000 项符合查询结果（耗时：0.0421秒） [XML]
How can I assign an ID to a view programmatically?
In an XML file, we can assign an ID to a view like android:id="@+id/something" and then call findViewById() , but when creating a view programmatically, how do I assign an ID?
...
Can multiple different HTML elements have the same ID if they're different elements?
Can multiple HTML elements have the same ID if they're of different element types? Is a scenario like this valid? Eg:
16 An...
MYSQL OR vs IN performance
...elieve people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it was 6 years ago, though...
The key must be an application-specific resource id
...
The tag id must be unique so it wants it to be an id created in a resources file to guarantee uniqueness.
If the view will only contain one tag though you can just do
setTag(objContact.onlineid);
...
How to find serial number of Android device?
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ?
...
PHP/MySQL insert row then get 'id'
The 'id' field of my table auto increases when I insert a row. I want to insert a row and then get that ID.
10 Answers
...
Oracle “(+)” Operator
...89 format (using a comma in the FROM clause to separate table references) didn't standardize OUTER joins.
The query would be re-written in ANSI-92 syntax as:
SELECT ...
FROM a
LEFT JOIN b ON b.id = a.id
This link is pretty good at explaining the difference between JOINs.
It should als...
jQuery Selector: Id Ends With?
Is there a selector that I can query for elements with an ID that ends with a given string?
9 Answers
...
SQL WHERE ID IN (id1, id2, …, idn)
I need to write a query to retrieve a big list of ids.
9 Answers
9
...
SQL query return data from multiple tables
...e know what colors we have in the car yard.
mysql> create table colors(id int(3) not null auto_increment primary key,
-> color varchar(15), paint varchar(10));
Query OK, 0 rows affected (0.01 sec)
mysql> show columns from colors;
+-------+-------------+------+-----+---------+--------...