大约有 42,000 项符合查询结果(耗时:0.0664秒) [XML]

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Hidden Features of Xcode

...h a huge influx of newbies to Xcode, I'm sure there are lots of Xcode tips and tricks to be shared. 89 Answers ...
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Should each and every table have a primary key?

I'm creating a database table and I don't have a logical primary key assigned to it. So, I'm thinking about leaving it without a primary key, but I'm feeling a bit guilty about it. Should I? ...
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grid controls for ASP.NET MVC? [closed]

... We have been using jqGrid on a project and have had some good luck with it. Lots of options for inline editing, etc. If that stuff isn't necessary, then we've just used a plain foreach loop like @Hrvoje. ...
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What is the difference between sql and mysql [closed]

I am new to databases and I was wondering: What is the difference between SQL and MySQL ? 5 Answers ...
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What is the difference between map and flatMap and a good use case for each?

Can someone explain to me the difference between map and flatMap and what is a good use case for each? 16 Answers ...
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Multiple arguments vs. options object

...gLength(inputStr, 10); I think that code is quite readable the way it is and passing individual parameters is just fine. On the other hand, there are functions with calls like this: initiateTransferProtocol("http", false, 150, 90, null, true, 18); Completely unreadable unless you do some resea...
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“static const” vs “#define” vs “enum”

... It depends on what you need the value for. You (and everyone else so far) omitted the third alternative: static const int var = 5; #define var 5 enum { var = 5 }; Ignoring issues about the choice of name, then: If you need to pass a pointer around, you must use (1). ...
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MySQL selecting yesterday's date

How can I display and count the values whose dates are yesterday? I used time() to insert date in the database. Example: ...
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How to pass objects to functions in C++?

...C++11: Pass by value, except when you do not need ownership of the object and a simple alias will do, in which case you pass by const reference, you must mutate the object, in which case, use pass by a non-const lvalue reference, you pass objects of derived classes as base classes, in which case yo...
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What is the difference between an IntentService and a Service? [duplicate]

Can you please help me understand what the difference between an IntentService and a Service is? 8 Answers ...