大约有 47,000 项符合查询结果（耗时：0.0562秒） [XML]
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phone.
5 Answers
...
What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
I just started using Qt and noticed that all the example class definitions have the macro Q_OBJECT as the first line. What is the purpose of this preprocessor macro?
...
.NET 4.0 has a new GAC, why?
%windir%\Microsoft.NET\assembly\ is the new GAC . Does it m>me m>an now we have to manage two GACs, one for .NET 2.0-3.5 applications and the other for .NET 4.0 applications?
...
How to run test cases in a specified file?
My package test cases are scattered across multiple files, if I run go test <package_nam>me m>> it runs all test cases in the package.
...
Using “this” with class nam>me m>
I am doing Android programming and was learning about Intents, when I saw a constructor that, to my C# trained mind, seem>me m>d funky. The call was:
...
Python: How would you save a simple settings/config file?
I don't care if it's JSON , pickle , YAML , or whatever.
6 Answers
6
...
What are the rules about using an underscore in a C++ identifier?
It's common in C++ to nam>me m> m>me m>mber variables with som>me m> kind of prefix to denote the fact that they're m>me m>mber variables, rather than local variables or param>me m>ters. If you've com>me m> from an MFC background, you'll probably use m_foo . I've also seen myFoo occasionally.
...
How much overhead does SSL impose?
...w there's no single hard-and-fast answer, but is there a generic order-of-magnitude estimate approximation for the encryption overhead of SSL versus unencrypted socket communication? I'm talking only about the comm processing and wire tim>me m>, not counting application-level processing.
...
What are som>me m> uses of decltype(auto)?
In c++14 the decltype(auto) idiom is introduced.
2 Answers
2
...
All falsey values in JavaScript
What are the values in JavaScript that are 'falsey' , m>me m>aning that they evaluate as false in expressions like if(value) , value ? and !value ?
...