大约有 47,000 项符合查询结果(耗时:0.0495秒) [XML]
performSelector may cause a leak because its selector is unknown
I'm getting the following warning by the ARC compiler:
19 Answers
19
...
Checking in of “commented out” code [closed]
Ok, here is something that has caused some friction at my current job and I really didn't expect it to. Organized in house software development is a new concept here and I have drawn up a first draft of some coding guidelines.
...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
Why would you create a "Implicitly Unwrapped Optional" vs creating just a regular variable or constant?
If you know that it can be successfully unwrapped then why create an optional in the first place?
For example, why is this:
...
Is there a way to cache GitHub credentials for pushing commits?
...itched to synchronizing my repositories to https:// on GitHub (due to firewall issues), and it asks for a password every time.
...
How to avoid null checking in Java?
I use object != null a lot to avoid NullPointerException .
62 Answers
62
...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
I've been hearing a lot about the PyPy project. They claim it is 6.3 times faster than the CPython interpreter on their site .
...
How to implement custom JsonConverter in JSON.NET to deserialize a List of base class objects?
I am trying to extend the JSON.net example given here
http://james.newtonking.com/projects/json/help/CustomCreationConverter.html
...
What is the difference between atomic / volatile / synchronized?
How do atomic / volatile / synchronized work internally?
7 Answers
7
...
Spring @Transactional - isolation, propagation
Can someone explain what isolation & propagation parameters are for in the @Transactional annotation via real-world example?
...
PHP Session Fixation / Hijacking
I'm trying to understand more about PHP Session Fixation and hijacking and how to prevent these problems. I've been reading the following two articles on Chris Shiflett's website:
...
