大约有 43,000 项符合查询结果（耗时：0.0712秒） [XML]
What is the JavaScript >>> operator and how do you use it?
I was looking at code from Mozilla that add a filter method to Array and it had a line of code that confused me.
7 Answers
...
Enterprise app deployment doesn't work on iOS 7.1
We distribute apps via an Enterprise account, using an itms-services:// URL. This has always worked fine, but after installing the iOS 7.1 beta on our iPad it refuses to install. Instead we just get the generic Cannot connect to example.com message that iOS unhelpfully displays when there is any...
How can I use redis with Django?
I've heard of redis-cache but how exactly does it work? Is it used as a layer between django and my rdbms, by caching the rdbms queries somehow?
...
What's the best way to share data between activities?
I have one activity which is the main activity used throughout the app and it has a number of variables. I have two other activities which I would like to be able to use the data from the first activity.
Now I know I can do something like this:
...
How to handle Objective-C protocols that contain properties?
I've seen usage of Objective-C protocols get used in a fashion such as the following:
6 Answers
...
Why doesn't delete set the pointer to NULL?
I always wondered why automatic setting of the pointer to NULL after delete is not part of the standard. If this gets taken care of then many of the crashes due to an invalid pointer would not occur. But having said that I can think of couple of reasons why the standard would have restricted this:...
Convert SVG image to PNG with PHP
I'm working on a web project that involves a dynamically generated map of the US coloring different states based on a set of data.
...
How do you push a tag to a remote repository using Git?
I have cloned a remote Git repository to my laptop, then I wanted to add a tag so I ran
9 Answers
...
What is the use of “ref” for reference-type variables in C#?
I understand that if I pass a value-type ( int , struct , etc.) as a parameter (without the ref keyword), a copy of that variable is passed to the method, but if I use the ref keyword a reference to that variable is passed, not a new one.
...
Best way to represent a fraction in Java?
I'm trying to work with fractions in Java.
26 Answers
26
...