大约有 43,000 项符合查询结果(耗时:0.0642秒) [XML]

https://stackoverflow.com/ques... 

Do HttpClient and HttpClientHandler have to be disposed between requests?

System.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ). ...
https://stackoverflow.com/ques... 

How to work with Git branches and Rails migrations

I am working on a rails app with quite a few git branches and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch. ...
https://stackoverflow.com/ques... 

What is the difference between buffer and cache memory in Linux?

...ear what's the difference between the two Linux memory concepts : buffer and cache . I've read through this post and it seems to me that the difference between them is the expiration policy: ...
https://stackoverflow.com/ques... 

Is there any difference between a GUID and a UUID?

I see these 2 acronyms thrown around, and I was wondering if there are any differences between a GUID and a UUID? 6 Answers...
https://stackoverflow.com/ques... 

Should I choose ActivePerl or Strawberry Perl for Windows? [duplicate]

... access to almost all useful Perl modules available on CPAN - but prepared and tested for Windows. This was for me, in the long run, a much better (and more robust) choice. Even for the Windows version of the Apache HTTP server, there is a precompiled mod_perl (2.0.4) ppm available which will (did f...
https://stackoverflow.com/ques... 

Close and Dispose - which to call?

Having read the threads Is SqlCommand.Dispose enough? and Closing and Disposing a WCF Service I am wondering for classes such as SqlConnection or one of the several classes inheriting from the Stream class does it matter if I close Dispose rather than Close? ...
https://stackoverflow.com/ques... 

What is exactly the base pointer and stack pointer? To what do they point?

...bp is usually set to esp at the start of the function. Function parameters and local variables are accessed by adding and subtracting, respectively, a constant offset from ebp. All x86 calling conventions define ebp as being preserved across function calls. ebp itself actually points to the previo...
https://stackoverflow.com/ques... 

Foreign key constraint may cause cycles or multiple cascade paths?

... SQL Server does simple counting of cascade paths and, rather than trying to work out whether any cycles actually exist, it assumes the worst and refuses to create the referential actions (CASCADE): you can and should still create the constraints without the referential acti...
https://stackoverflow.com/ques... 

How does PHP 'foreach' actually work?

Let me prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach ". ...
https://stackoverflow.com/ques... 

How do I use extern to share variables between source files?

...ferenced in other source files, such as file2.c. It is important to understand the difference between defining a variable and declaring a variable: A variable is declared when the compiler is informed that a variable exists (and this is its type); it does not allocate the storage for the variable a...