大约有 47,000 项符合查询结果（耗时：0.0515秒） [XML]
Efficient SQL test query or validation query that will work across all (or most) databases
...g_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Apache Commons DBCP's validationQuery, since the query doesn't return any rows
VAL...
git working on two branches simultaneously
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This should be the new accepted answer, since 2.5.X is now the recommended version, even for windows i.imgur.com/oQvUhVl.png git-scm.com/download/win
– RAnders00
Sep 4 '15 at 18:56
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Why can't variables be declared in a switch statement?
...the old days, you might have automatically got an "extra" stack frame, but now that should not be the case for any decent optimizing compiler.
– Tall Jeff
Sep 18 '08 at 14:37
11
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Capture screenshot of active window?
...e active window and take a screenshot of this active window. Does anyone know how I can do this?
11 Answers
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Which is faster: Stack allocation or Heap allocation
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On some (mostly embedded, that I know of) architectures, stack may be stored in fast on-die memory (e.g. SRAM). This can make a huge difference!
– leander
Jul 15 '09 at 1:16
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NodeJS / Express: what is “app.use”?
...t has a middleware stack that can be customized in app.configure()(this is now deprecated in version 4.x).
To setup your middleware, you can invoke app.use(<specific_middleware_layer_here>) for every middleware layer that you want to add (it can be generic to all paths, or triggered only on ...
JavaScript ternary operator example with functions
...unction() ? imlost() : whathappuh() : lostinsyntax() : thisisprobablybrokennow() ? //I'm lost in my own (awful) example by now.
//Not complete... or for average humans to read.
if(this != that) //Ternary would be done by now
{
x = this;
}
else
}
x = this + 2;
}
A really basic rule of thu...
Insert a line break in mailto body
...codeURIComponent().
For example, this message:
hello\rthis answer is now well formated\rand it contains good knowleadge\rthat is why I am up voting
URI Encoded, results in:
hello%0Dthis%20answer%20is%20now%20well%20formated%0Dand%20it%20contains%20good%20knowleadge%0Dthat%20is%20why%20I%20a...
How to create a DataTable in C# and how to add rows?
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I now see elsewhere on this page that @rahul mentions this in his answer as well.
– Funka
Jan 29 '13 at 19:37
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How to remove focus without setting focus to another control?
... @InteXX: I came across this problem again today and found a solution. I know you've gone down a different route now, but give this a try if you ever find yourself in the same boat again!
– actionshrimp
May 28 '11 at 16:34
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