大约有 44,000 项符合查询结果（耗时：0.0501秒） [XML]
Facebook database design?
...O_INCREMENT=2 DEFAULT CHARSET=utf8;
Friends of Friends Query:
(
select friend_id
from friends
where user_id = 1
) union (
select distinct ff.friend_id
from
friends f
join friends ff on ff.user_id = f.friend_id
where f.use...
Does PostgreSQL support “accent insensitive” collations?
...n unaccent() you can use with your example (where LIKE seems not needed).
SELECT *
FROM users
WHERE unaccent(name) = unaccent('João');
Index
To use an index for that kind of query, create an index on the expression. However, Postgres only accepts IMMUTABLE functions for indexes. If a functio...
A valid provisioning profile for this executable was not found for debug mode
...& Files" -->Target --> expand it --> right click your app and select Clean "your app"
3) Goto->Window-->Organizer
4) In the Devices tab on the left, select your iphone
5) In the Provisioning section of the selected iphone delete all the current profiles (if any)
6) Unplug your...
Xcode 4, Core Data Model Version - Set Current Version
...d "View" button at the top right of the window).
In the Utilities sidepane select the File inspector (little paper icon on the top left)
You will see "Versioned Core Data Model" as a group so just change the "Current" drop-down to your new version.
...
How to solve “The specified service has been marked for deletion” error
...ing state. The following procedure worked for me:
open task manager > select services tab > select the service > right click and select "go to process" > right click on the process and select End process
Service should be gone after that
...
C compiler for Windows? [closed]
...aq.html#C-is-subset I think the worst part is the sizeof() mismatches for chars and ints, plus the added keywords in C++.
– Alex M
Sep 22 '08 at 18:41
17
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Can I change the root EBS device of my amazon EC2 instance?
...
I don't have enough rep to add a comment to the selected answer, but I do want to point out that for me, /dev/sda1 did not work (did not attach as root), but using /dev/xvda worked (attached as root). The instance is one of the newer t2.micro ones using HVM.
...
Looking for jQuery find(..) method that includes the current node
...
For jQuery 1.8 and up, you can use .addBack(). It takes a selector so you don't need to filter the result:
object.find('selector').addBack('selector')
Prior to jQuery 1.8 you were stuck with .andSelf(), (now deprecated and removed) which then needed filtering:
object.find('sele...
can we use xpath with BeautifulSoup?
...tree.HTMLParser()
tree = etree.parse(response, htmlparser)
tree.xpath(xpathselector)
There is also a dedicated lxml.html() module with additional functionality.
Note that in the above example I passed the response object directly to lxml, as having the parser read directly from the stream is more...
Check if a path represents a file or a folder
...irectory names in Android? As it comes out, folder names can contain '.' chars, so how does system understand whether there's a file or a folder?
...