大约有 44,000 项符合查询结果（耗时：0.0604秒） [XML]
How do I sort an observable collection?
.... For larger collections watch out for the number of collection changed notifications.
I have updated my code to improve performance (thanks to nawfal) and to handle duplicates which no other answers here do at time of writing. The observable is partitioned into a left sorted half and a right unsort...
How can I do an UPDATE statement with JOIN in SQL Server?
...I/ISO method will typically be much slower than the other two methods, but if you're using a SQL DBMS other than MySQL, SQL Server, or Oracle, then it may be the only way to go (e.g. if your SQL DBMS doesn't support MERGE):
ANSI/ISO:
update ud
set assid = (
select sale.assid
...
How does UTF-8 “variable-width encoding” work?
...ell what kind of byte you're looking at from the first few bits, then even if something gets mangled somewhere, you don't lose the whole sequence.
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Cannot install Lxml on Mac os x 10.9
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A few notes on how to manually check if they are installed - stackoverflow.com/a/20834890/255961
– studgeek
Jul 28 '14 at 4:34
1
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Convert a RGB Color Value to a Hexadecimal String
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String hex = String.format("#%02x%02x%02x", r, g, b);
Use capital X's if you want your resulting hex-digits to be capitalized (#FFFFFF vs. #ffffff).
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Android: how to make keyboard enter button say “Search” and handle its click?
...boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
shar...
How to fetch the row count for all tables in a SQL SERVER database [duplicate]
I am searching for a SQL Script that can be used to determine if there is any data (i.e. row count) in any of the tables of a given database.
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Plot two graphs in same plot in R
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How to use the same if x is different? Say, I have x1 and y1 for one graph and add another graph of x2 and y2 in the same graph. Both x1 and x2 have same range but different values.
– Kavipriya
Oct 21 '15 a...
Escape angle brackets in a Windows command prompt
...t the single escape with quotes:
cmd /c "echo ^<html^>"|findstr .
If you want to use the delayed expansion technique to avoid escapes, then there are even more surprises (You might not be surprised if you are an expert on the design of CMD.EXE, but there is no official MicroSoft documentati...
Entity Framework: There is already an open DataReader associated with this Command
...there is more then one command executed but you don't see it. I'm not sure if this can be traced in Profiler (exception can be thrown before second reader is executed). You can also try to cast the query to ObjectQuery and call ToTraceString to see the SQL command. It is hard to track. I always turn...