大约有 43,000 项符合查询结果(耗时:0.0518秒) [XML]

https://stackoverflow.com/ques... 

Arrays, heap and stack and value types

...ove code, is new int[100] generating the array on the heap? From what I've read on CLR via c#, the answer is yes. But what I can't understand, is what happens to the actual int's inside the array. As they are value types, I'd guess they'd have to be boxed, as I can, for example, pass myIntegers to o...
https://stackoverflow.com/ques... 

Why does Python code run faster in a function?

...obal. As for speed local > global > attribute according to what I've read here. So accessing x in foo_func is fastest, followed by val, followed by foo.bar. foo.attr isn't a local lookup because in the context of this convo, we're talking about local lookups being a lookup of a variable that b...
https://stackoverflow.com/ques... 

Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?

...d to "utf-8" and changing it raises an error. I suggest some pointers for reading: http://blog.ianbicking.org/illusive-setdefaultencoding.html http://nedbatchelder.com/blog/200401/printing_unicode_from_python.html http://www.diveintopython3.net/strings.html#one-ring-to-rule-them-all http://boodeb...
https://stackoverflow.com/ques... 

Why must we define both == and != in C#?

... C#: Many developers wish there was a language that was easy to write, read, and maintain like Visual Basic, but that still provided the power and flexibility of C++. Yes the design goal for C# was to give nearly the same amount of power as C++, sacrificing only a little for conveniences like ...
https://stackoverflow.com/ques... 

is there a css hack for safari only NOT chrome?

...CC; } }} For more 'version specific' Safari CSS, please continue to read below. /* Safari 11+ */ @media not all and (min-resolution:.001dpcm) { @supports (-webkit-appearance:none) and (stroke-color:transparent) { .safari_only { color:#0000FF; background-color:#CCCCCC;...
https://stackoverflow.com/ques... 

delegate keyword vs. lambda notation

... I got out my popcorn and read the whole thing. That's some distinction that I would probably never think about even if I was staring it right in the face. – MojoFilter Nov 18 '08 at 19:40 ...
https://stackoverflow.com/ques... 

How to mock ConfigurationManager.AppSettings with moq

... ConfigurationManager.AppSettings is a NameValueCollection which is not thread-safe, so parallel tests using it without proper synchronization is not a good idea anyway. Otherwise you can just call ConfigurationManager.AppSettings.Clear() in your TestInitialize / ctor and you're golden. ...
https://stackoverflow.com/ques... 

What are copy elision and return value optimization?

... the impression that all modern compilers always do RVO. Furthermore, I've read somewhere that also without any optimizations on, the compilers apply it. But, of course, I am not sure about it. That's why I am asking. – j00hi Feb 5 '15 at 8:02 ...
https://stackoverflow.com/ques... 

What does enctype='multipart/form-data' mean?

...orm-data;, the field name, the filename, followed by the data. The server reads the data until the next boundary string. The browser must choose a boundary that will not appear in any of the fields, so this is why the boundary may vary between requests. Because we have the unique boundary, no enco...
https://stackoverflow.com/ques... 

Is git-svn dcommit after merging in git dangerous?

...t paste sha-1 hash of our last svn commit instead of mine. You may want to read the documentation with 'git help rebase' for the details. In short: this command first opens an editor presenting your commits ---- just change 'pick' to 'squash' for all those commits that you want to squash with previ...