大约有 7,540 项符合查询结果（耗时：0.0221秒） [XML]
How can I access “static” class variables within class methods in Python?
...takes a lot of work to remember when getting started is that python is not java. More than just a cliche. In java, an entire class is compiled, making the namespace resolution real simple: any variables declared outside a method (anywhere) are instance (or, if static, class) variables and are impl...
What is Type-safe?
...5"), and it is expecting an integer.
In a loosely typed language, such as javascript, I can do the following:
function AddTwoNumbers(a, b)
{
return a + b;
}
if I call it like this:
Sum = AddTwoNumbers(5, "5");
Javascript automaticly converts the 5 to a string, and returns "55". This is du...
What is the difference between a field and a property?
...tion of the class. Therefore we wrap fields with Properties (or methods in Java's case) to give us the ability to change the implementation without breaking code depending on us. Seeing as we can put logic in the Property also allows us to perform validation logic etc if we need it.
C# 3 has the pos...
Detect application heap size in Android
...r bitmap data, which is allocated by native code, while the app heap holds Java application data. I was interested to learn that the native heap is counted against the app heap's limit, and after 3.0 the allocations actually occur on the app's heap. Diane Hackborn (hackbod) posts on this topic her...
Are non-synchronised static methods thread safe if they don't modify static class variables?
...you find one, its not thread safe.
Please be also aware, that most of the Java 1.5 Collection classes are not threadsafe, except those where stated, like ConcurrentHashMap.
And if you really want to dive into this, have a close look at the volatile keyword and ALL its side effects. Have a look at...
App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...DP 地址方案，请参阅 UdpClient：地址解析/地址方案。有关 Java 中的端点，请参阅 UdpClient：地址解析/Java。
在网络上相互通信的设备称为“端点”或“主机”（它们并不完全相同，但这两个术语通常被同等使用）。因此发送者被...
Executors.newCachedThreadPool() versus Executors.newFixedThreadPool()
...
Just to complete the other answers, I would like to quote Effective Java, 2nd Edition, by Joshua Bloch, chapter 10, Item 68 :
"Choosing the executor service for a particular application can be tricky. If you’re writing a small program, or a lightly loaded server, using Executors.new- Cache...
Is there a typical state machine implementation pattern?
...Stateless library exists and that blog shows a simple example with code. A Java implementation (pre Java8) is discussed. I was shown a Python example on GitHub as well.
share
|
improve this answer
...
Is there a better way to express nested namespaces in C++ within the header
I switched from C++ to Java and C# and think the usage of namespaces/packages is much better there (well structured). Then I came back to C++ and tried to use namespaces the same way but the required syntax is horrible within the header file.
...
Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
...eded Up Robust Features (SURF).
You can find a nice OpenCV code example in Java, C++, and Python on this page: Features2D + Homography to find a known object
Both algorithms are invariant to scaling and rotation. Since they work with features, you can also handle occlusion (as long as enough keypoin...