大约有 47,000 项符合查询结果(耗时:0.0699秒) [XML]

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Multi-statement Table Valued Function vs Inline Table Valued Function

...e compiler cannot use any table statistics on the tables in the MSTVF. So, all things being equal, (which they rarely are), the ITVF will perform better than the MSTVF. In my tests, the performance difference in completion time was negligible however from a statistics standpoint, it was noticeable. ...
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How to limit the amount of concurrent async I/O operations?

... Stephen Toub, but the less announced news is that the async semaphore actually made it into the Beta release of .NET 4.5 If you look at our beloved SemaphoreSlim class (which you should be using since it's more performant than the original Semaphore), it now boasts the WaitAsync(...) series of ove...
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Is there a way to change context to iframe in javascript console?

... Chrome 15 allows you to change the scope of the console. On the bottom of the console, next to the clear console button, there is a menu that says <top frame> which will give a list of available frames: Firefox has a similar ...
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How do I view the SQL generated by the Entity Framework?

... redirecting to Immediate (Tools > Options > Debugging > Redirect all Output Window text to Immediate Window) – rkawano May 21 '14 at 17:41 ...
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Is bool a native C type?

... in the current C - C99, but not in C89/90. In C99 the native type is actually called _Bool, while bool is a standard library macro defined in stdbool.h (which expectedly resolves to _Bool). Objects of type _Bool hold either 0 or 1, while true and false are also macros from stdbool.h. Note, BTW, t...
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Entity Framework code first unique column

...s: SQL Server retains the 900-byte limit for the maximum total size of all index key columns." (from: http://msdn.microsoft.com/en-us/library/ms191241.aspx ) You can solve this by setting a maximum string length on your model: [StringLength(450)] Your model will look like this now in EF CF...
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What are JavaScript's builtin strings?

... First of all, I would like to thank Jason and all the contributors for playing with that funny snippet. I have written that piece of code just for fun in order to send it to my wife on February 14 :) Having only Chrome installed on th...
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Changing UIButton text

... @erdekhayser Actually, read-only properties CAN have read/write properties. I use the titlelabel's tag to pass an integer to a action method. Also see Apple's docs link Although this property is read-only, its own properties are read/write. U...
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How can I check if a Perl array contains a particular value?

...For the record, this code still does iterate through the array. The map{} call simply makes that iteration very easy to type. – Kenny Wyland Mar 3 '12 at 23:09 3 ...
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Dealing with commas in a CSV file

...any easily-available csv library - that is to say RFC 4180. There's actually a spec for CSV format and how to handle commas: Fields containing line breaks (CRLF), double quotes, and commas should be enclosed in double-quotes. http://tools.ietf.org/html/rfc4180 So, to have values foo and ...