大约有 43,000 项符合查询结果（耗时：0.0250秒） [XML]
difference between offsetHeight and clientHeight
... is the theory. But the theory and the reality are not always the same, at least not for the <BODY> or the <HTML> elements which may be important for scrolling operations in javascript.
Microsoft has a nice image in the MSDN:
If you have a HTML page which shows a vertical scrollbar o...
How can I check if a View exists in a Database?
...
This is the most portable, least intrusive way:
select
count(*)
from
INFORMATION_SCHEMA.VIEWS
where
table_name = 'MyView'
and table_schema = 'MySchema'
Edit: This does work on SQL Server, and it doesn't require you joining to sys.sch...
How can I resize an image dynamically with CSS as the browser width/height changes?
...is the CSS solution, I just add a style="width: 100%", and works for me at least in chrome and Safari. I dont have ie, so just test there, and let me know, here is the code:
<div id="gallery" style="width: 100%">
<img src="images/fullsize.jpg" alt="" id="fullsiz...
What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
...a table to itself as if the table were two tables, temporarily renaming at least one table in the SQL statement.
CARTESIAN JOIN: returns the Cartesian product of the sets of records from the two or more joined tables.
WE can take each first four joins in Details :
We have two tables with the foll...
How do you do a limit query in JPQL or HQL?
...
At least with Oracle dialect this is not true (Hibernate uses the ROWNUM virtual column). Maybe it depends on the driver. Other DBs have the TOP function.
– Lluis Martinez
Jun 22 '17 at 11:...
How should equals and hashcode be implemented when using JPA and Hibernate
...ombination of attributes that is not going to change during object (or, at least, session) lifetime.
If the above is impossible, base equals() / hashCode() on primary key IF it's set and object identity / System.identityHashCode() otherwise. The important part here is that you need to reload your Se...
Is there an alternative sleep function in C to milliseconds?
...eep() function suspends execution of the calling thread for
(at least) usec microseconds. The sleep may be lengthened slightly by
any system activity or by the time spent processing the call or by the
granularity of system timers.
usleep() takes microseconds, so you w...
Getting the location from an IP address [duplicate]
...ns this info can only be "so good". If it gets your country right, and at least close on the state/province, I'd consider that a WIN. If you happen to be using this to look-up info for a DOS attack, keep in mind the IPs might not even be valid (not assigned to anyone or outside valid public IP ran...
How to count the number of true elements in a NumPy bool array
... About the method with sum(..), is True always equal to 1 in python (or at least in numpy)? If it is not guaranteed, I will add a check, 'if True==1:' beforehand. About count_nonzero(..), unfortunately, it seems not implemented in my numpy module at version 1.5.1, but I may have a chance to use it i...
How can I get the full/absolute URL (with domain) in Django?
...tion of the native Sites framework and get_absolute_url instead. Set up at least one Site in the admin, make sure your model has a get_absolute_url() method, then:
>>> from django.contrib.sites.models import Site
>>> domain = Site.objects.get_current().domain
>>> obj = My...