大约有 11,390 项符合查询结果（耗时：0.0186秒） [XML]
When does invoking a member function on a null instance result in undefined behavior?
...
Both (a) and (b) result in undefined behavior. It's always undefined behavior to call a member function through a null pointer. If the function is static, it's technically undefined as well, but there's some dispute.
The f...
How to find time complexity of an algorithm
...For example, lets see how we simplify 2N + 2 machine instructions to describe this as just O(N).
Why do we remove the two 2s ?
We are interested in the performance of the algorithm as N becomes large.
Consider the two terms 2N and 2.
What is the relative influence of these two terms as N become...
CSRF Token necessary when using Stateless(= Sessionless) Authentication?
...
I found some information about CSRF + using no cookies for authentication:
https://auth0.com/blog/2014/01/07/angularjs-authentication-with-cookies-vs-token/
"since you are not relying on cookies, you don't need to protect against cross site requests...
How can I profile C++ code running on Linux?
... you're in a hurry and you can manually interrupt your program under the debugger while it's being subjectively slow, there's a simple way to find performance problems.
Just halt it several times, and each time look at the call stack. If there is some code that is wasting some percentage of the tim...
Change date of git tag (or GitHub Release based on it)
I'm adding Releases to my projects on GitHub by adding tags to various commits in the Main branch.
3 Answers
...
Use of var keyword in C#
...
I still think var can make code more readable in some cases. If I have a Customer class with an Orders property, and I want to assign that to a variable, I will just do this:
var orders = cust.Orders;
I don't care if Customer.Orders is IEnumerable<Order>, Ob...
How to make shallow git submodules?
Is it possible to have shallow submodules? I have a superproject with several submodules, each with a long history, so it gets unnecessarily big dragging all that history.
...
Insert code into the page context using a content script
...w to create Chrome extensions. I just started developing one to catch YouTube events. I want to use it with YouTube flash player (later I will try to make it compatible with HTML5).
...
Flask vs webapp2 for Google App Engine
...ngine application and currently considering two frameworks: Flask and webapp2 . I'm rather satisfied with built-in webapp framework that I've used for my previous App Engine application, so I think webapp2 will be even better and I won't have any problems with it.
...
git stash blunder: git stash pop and ended up with merge conflicts
...I removed the files from the file system and did a git checkout as shown below, but it thinks the files are still unmerged. I then tried replacing the files and doing a git checkout again and same result. I event tried forcing it with -f flag. Any help would be appreciated!
...