大约有 42,000 项符合查询结果（耗时：0.0384秒） [XML]
Extracting an attribute value with beautifulsoup
...
for repElem in repElemList:
print("Processing repElem...")
repElemID = repElem.get('id')
repElemName = repElem.get('name')
print("Attribute id = %s" % repElemID)
print("Attribute name = %s" % repElemName)
against XML file conf//test1.xml that looks like:
<?xml version="1....
What is the usefulness of PUT and DELETE HTTP request methods?
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The DELETE method requests that the origin server delete the resource identified by the Request-URI. This method MAY be overridden by human intervention (or other means) on the origin server. The client cannot be guaranteed that the operation has been carried out, even if the status code return...
Is there a JSON equivalent of XQuery/XPath?
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How solid is this? And I can't find a Java or C# version which is a deal killer for us.
– David Thielen
Jun 12 '12 at 18:08
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Reference: mod_rewrite, URL rewriting and “pretty links” explained
...ay also look like this:
GET /foo/bar?baz=42 HTTP/1.1
This is just as valid a request for a URL, and it has more obviously nothing to do with files.
The web server is an application listening on a port, accepting HTTP requests coming in on that port and returning a response. A web server is entir...
Warning: Null value is eliminated by an aggregate or other SET operation in Aqua Data Studio
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You would mostly be using COUNT to summarize over a UID. Therefore
COUNT([uid]) will produce the warning:
Warning: Null value is eliminated by an aggregate or other SET operation.
whilst being used with a left join, where the counted object does not exist.
Using COUNT(...
Exit single-user mode
...ions to database 'my_db'.
Kill all the connections by doing KILL { session id } where session id is the SPID listed by sp_who2.
Third, open a new query window.
Execute the following code.
-- Start in master
USE MASTER;
-- Add users
ALTER DATABASE [my_db] SET MULTI_USER
GO
See my blog article o...
Rails: fields_for with index?
... This answer should be edit and update with Ben's answer as notapatch said
– JudgeProphet
Sep 25 at 14:37
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show 1 more comment
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In SQL, what's the difference between count(column) and count(*)?
...s not
[edit] added this code so that people can run it
create table #bla(id int,id2 int)
insert #bla values(null,null)
insert #bla values(1,null)
insert #bla values(null,1)
insert #bla values(1,null)
insert #bla values(null,1)
insert #bla values(1,null)
insert #bla values(null,null)
select count(...
postgresql return 0 if returned value is null
...ce_scan
WHERE listing_Type = 'AARM'
AND u_kbalikepartnumbers_id = 1000307
AND ( EXTRACT( DAY FROM ( NOW() - dateEnded ) ) ) * 24 < 48
AND COALESCE( price, 0 ) > ( SELECT AVG( COALESCE( price, 0 ) )* 0.50
FROM ( SELECT *, cume_d...
android.widget.Switch - on/off event listener?
I would like to implement a switch button, android.widget.Switch (available from API v.14).
10 Answers
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