大约有 41,000 项符合查询结果（耗时：0.0615秒） [XML]
What's “P=NP?”, and why is it such a famous question? [closed]
...
P stands for polynomial time. NP stands for non-deterministic polynomial time.
Definitions:
Polynomial time means that the complexity of the algorithm is O(n^k), where n is the size of your data (e. g. number of elements in a lis...
Scanner is skipping nextLine() after using next() or nextFoo()?
I am using the Scanner methods nextInt() and nextLine() for reading input.
19 Answers
...
What is the difference between declarative and procedural programming paradigms?
...b-paradigms of the imperative programming paradigm, such as the procedural or the object-oriented programming paradigms.
In the imperative programming paradigm, you describe the algorithm step-by-step, at various degrees of abstraction.
Examples of programming languages which support the procedur...
Should I test private methods or only public ones? [closed]
...e methods breaks encapsulation.
If I find that the private method is huge or complex or important enough to require its own tests, I just put it in another class and make it public there (Method Object). Then I can easily test the previously-private-but-now-public method that now lives on its own c...
Javadoc @see or {@link}?
...nion, {@link} is best used when you literally use a class, field, constructor or method name in your description. The user will be able to click through to the javadoc of what you've linked.
I use the @see annotation in 2 cases:
Something is very relevant but not mentioned in the description.
I r...
What's the difference between eval, exec, and compile?
...
The short answer, or TL;DR
Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects.
eval and exec have these tw...
Meaning of “[: too many arguments” error from if [] (square brackets)
I couldn't find any one simple straightforward resource spelling out the meaning of and fix for the following BASH shell error, so I'm posting what I found after researching it.
...
Are static class instances unique to a request or a server in ASP.NET?
On an ASP.NET website, are static classes unique to each web request, or are they instantiated whenever needed and GCed whenever the GC decides to disposed of them?
...
What's the difference between JPA and Spring Data JPA?
...ween Spring Data-JPA and JPA. I know about JPA that it is a specification for persisting the Java Objects to a relational database using popular ORM technology.
...
What does Maven do, in theory and in practice? When is it worth to use it? [closed]
I am about to start a Java project just for practice. I've read about Maven, but I don't actually understand when it is meant to be used.
...