大约有 228 项符合查询结果（耗时：0.0184秒） [XML]
Most efficient way to check for DBNull and then assign to a variable?
... In virtually all cases == is going to be equivalent to ReferenceEquals (esp. to DBNull) and it's much more readable. Use @Marc Gravell's optimization if you want, but I'm with him -- probably not going to help much. BTW, reference equality ought to always beat type checking.
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How does this CSS produce a circle?
...r resources
References
W3C: CSS Backgrounds and Borders Module Level 3 (esp. 5. Rounded Corners)
Demonstrations
Please open the demo below, which shows how the border-radius affects the border (think of the inner blue box as the content box, the inner black border as the padding border, the e...
Apache Spark: The number of cores vs. the number of executors
...pu-vcores, should probably be set to 63 *
1024 = 64512 (megabytes) and 15 respectively. We avoid allocating 100%
of the resources to YARN containers because the node needs some
resources to run the OS and Hadoop daemons. In this case, we leave a
gigabyte and a core for these system processes. Cloude...
Placeholder in UITextView
...
in some cases (esp. iOS 5 compatibility) it is required to override paste: - (void)paste:(id)sender { [super paste:sender]; [self textChanged:nil]; }
– Martin Ullrich
Jul 14 '11 at 15:32
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Understanding MongoDB BSON Document size limit
...documents now, as most embedded documents will now cross the limit easily. Esp with array of documents inside them
– Sharjeel Ahmed
Feb 15 '16 at 8:43
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.NET JIT potential error?
...IT.
// save context
00000000 push ebp
00000001 mov ebp,esp
00000003 push edi
00000004 push esi
00000005 push ebx
// put oDoesSomething pointer in ebx
00000006 mov ebx,ecx
// zero out edi, this will store oVec.y
00000008 xor edi,...
How to handle :java.util.concurrent.TimeoutException: android.os.BinderProxy.finalize() timed out af
...wer and oba's answer if they're seeing the same symptoms (Samsung devices (esp. Galaxy S 4), etc.)
– parkerfath
Mar 12 '15 at 23:38
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JRuby on Rails vs. Ruby on Rails, what's difference?
...this question, related to GIL.
The main difference you should care about esp. in web-applications such as ones built with Rails is true concurrency ("Global Interpreter Lock" free). When two threads are running (e.g. serving 2 user requests) with JRuby they are capable of running concurrently with...
Difference between Bridge pattern and Adapter pattern
...called it "pseudo-remotely". This often times caused performance problems (esp. when really called over the wire). Experienced developers would use the facade pattern to provide a very coarse-grained interface to the client. This facade would then in turn do multiple calls to different more fine-gra...
What is the instanceof operator in JavaScript?
... was tricky / new to understand (not do) that "flexibility" in JavaScript, esp. for some who are used to a language that requires e.g. explicit casting to alter a variable type. As you pointed out, it's very easy to change the type from e.g. primitive int to primitive string.
–...