大约有 15,500 项符合查询结果（耗时：0.0181秒） [XML]
Why do people hate SQL cursors so much? [closed]
...der many circumstances, but as a blanket statement it's problematic. For example, I've made good use of cursors in situations where I want to perform an update or delete operation affecting many rows of a large table which is receiving constant production reads. Running a stored procedure which do...
Warning: push.default is unset; its implicit value is changing in Git 2.0
...
It's explained in great detail in the docs, but I'll try to summarize:
matching means git push will push all your local branches to the ones with the same name on the remote. This makes it easy to accidentally push a branch you d...
What's a good way to overwrite DateTime.Now during testing?
...not feel right - it robs you of the ability to test particular times, for example if you discover a bug that only happens near a midnight boundary, or on Tuesdays. Using the current time won't allow you to test those scenarios. Or at least not whenever you want.
...
How do you perform a CROSS JOIN with LINQ to SQL?
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A cross-join is simply the Cartesian product of two sets. There's no explicit join operator for it.
var combo = from p in people
from c in cars
select new
{
p.Name,
c.Make,
c.Model,
c.Colour
...
Excel: last character/string match in a string
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With newer versions of excel come new functions and thus new methods. Though it's replicable in older versions (yet I have not seen it before), when one has Excel O365 one can use:
=MATCH(2,1/(MID(A1,SEQUENCE(LEN(A1)),1)="Y"))
This can also be us...
Add custom headers to WebView resource requests - android
...request coming from the WebView. I know loadURL has the parameter for extraHeaders , but those are only applied to the initial request. All subsequent requests do not contain the headers. I have looked at all overrides in WebViewClient , but nothing allows for adding headers to resource reque...
What is the use of ObservableCollection in .net?
...ect sender, NotifyCollectionChangedEventArgs e)
{
foreach (var x in e.NewItems)
{
// do something
}
foreach (var y in e.OldItems)
{
//do something
}
if (e.Action == NotifyCollectionChangedAction.Move)
{
...
What is the most frequent concurrency issue you've encountered in Java? [closed]
This is a poll of sorts about common concurrency problems in Java. An example might be the classic deadlock or race condition or perhaps EDT threading bugs in Swing. I'm interested both in a breadth of possible issues but also in what issues are most common. So, please leave one specific answer o...
How do I split a string with multiple separators in javascript?
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Pass in a regexp as the parameter:
js> "Hello awesome, world!".split(/[\s,]+/)
Hello,awesome,world!
Edited to add:
You can get the last element by selecting the length of the array minus 1:
>>> bits = "Hello awesome, world...
How to configure postgresql for the first time?
I have just installed postgresql and I specified password x during installation.
When I try to do createdb and specify any password I get the message:
...