大约有 47,000 项符合查询结果（耗时：0.0754秒） [XML]
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
I can't seem to be able to find a summary that distinguishes the difference between these three annotations.
3 Answers
...
Scala equivalent of Java java.lang.Class Object
The question is best explained by an example:
2 Answers
2
...
What does git rev-parse do?
What does git rev-parse do?
3 Answers
3
...
How big is too big for a PostgreSQL table?
I'm working on the design for a RoR project for my company, and our development team has already run into a bit of a debate about the design, specifically the database.
...
Is having an 'OR' in an INNER JOIN condition a bad idea?
In trying to improve the speed of an immensely slow query (several minutes on two tables with only ~50,000 rows each, on SQL Server 2008 if it matters), I narrowed down the problem to an OR in my inner join, as in:
...
Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
My numpy arrays use np.nan to designate missing values. As I iterate over the data set, I need to detect such missing values and handle them in special ways.
...
datetime.parse and making it work with a specific format
I have a datetime coming back from an XML file in the format:
2 Answers
2
...
JavaScript click event listener on class
I'm currently trying to write some JavaScript to get the attribute of the class that has been clicked. I know that to do this the correct way, I should use an event listener.
My code is as follows:
...
Async/Await vs Threads
In .Net 4.5 Microsoft has added the new Async/Await feature to simplify asynchronous coding. However, I wonder
3 Answers...