大约有 41,000 项符合查询结果(耗时:0.0848秒) [XML]

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What is the “volatile” keyword used for?

... correct usage. Could you please tell me what it should be used for in C# and in Java? 8 Answers ...
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Why does the arrow (->) operator in C exist?

... I'll interpret your question as two questions: 1) why -> even exists, and 2) why . does not automatically dereference the pointer. Answers to both questions have historical roots. Why does -> even exist? In one of the very first versions of C language (which I will refer as CRM for "C Refe...
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Why can't a text column have a default value in MySQL?

If you try to create a TEXT column on a table, and give it a default value in MySQL, you get an error (on Windows at least). I cannot see any reason why a text column should not have a default value. No explanation is given by the MySQL documentation. It seems illogical to me (and somewhat frustrati...
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What is the difference between “Class.forName()” and “Class.forName().newInstance()”?

What is the difference between Class.forName() and Class.forName().newInstance() ? 9 Answers ...
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AngularJS : The correct way of binding to a service properties

... Consider some pros and cons of the second approach: 0 {{lastUpdated}} instead of {{timerData.lastUpdated}}, which could just as easily be {{timer.lastUpdated}}, which I might argue is more readable (but let's not argue... I'm giving this poi...
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Can anyone explain what JSONP is, in layman terms? [duplicate]

... Preface: This answer is over six years old. While the concepts and application of JSONP haven't changed (i.e. the details of the answer are still valid), you should look to use CORS where possible (i.e. your server or API supports it, and the browser support is adequate), as JSONP has in...
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HEAD and ORIG_HEAD in Git

What do these symbols refer to and what do they mean? 4 Answers 4 ...
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UIDevice uniqueIdentifier deprecated - What to do now?

...ght that the UIDevice uniqueIdentifier property is deprecated in iOS 5 and unavailable in iOS 7 and above. No alternative method or property appears to be available or forthcoming. ...
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Using Vim's tabs like buffers

...nto 1 tab == 1 buffer is an exercise in futility. Vim doesn't know or care and it will not respect it on all commands—in particular, anything that uses the quickfix buffer (:make, :grep, and :helpgrep are the ones that spring to mind) will happily ignore tabs and there's nothing you can do to stop...
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Error Domain=NSURLErrorDomain Code=-1005 “The network connection was lost.”

I have an application which works fine on Xcode6-Beta1 and Xcode6-Beta2 with both iOS7 and iOS8. But with Xcode6-Beta3, Beta4, Beta5 I'm facing network issues with iOS8 but everything works fine on iOS7. I get the error "The network connection was lost." . The error is as follows: ...