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What's the difference between a catalog and a schema in a relational database?
I used to think schema were the "upper wrapper" object before the database itself.
I mean DB.schema.<what_ever_object_name_under_schema> .
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What is the difference between pip and conda?
I know pip is a package manager for python packages. However, I saw the installation on IPython's website use conda to install IPython.
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Best way to define error codes/strings in Java?
... service in Java, and I am trying to figure out the best way to define error codes and their associated error strings . I need to have a numerical error code and an error string grouped together. Both the error code and error string will be sent to the client accessing the web service. For example,...
Abstract class in Java
...g subclass that can be instantiated. An abstract class does a few things for the inheriting subclass:
Define methods which can be used by the inheriting subclass.
Define abstract methods which the inheriting subclass must implement.
Provide a common interface which allows the subclass to be inter...
JUnit confusion: use 'extends TestCase' or '@Test'?
I've found the proper use (or at least the documentation) of JUnit very confusing.
This question serves both as a future reference and as a real question.
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Understanding Fragment's setRetainInstance(boolean)
...o answer your questions:
Does the fragment also retain its view state, or will this be recreated on configuration change - what exactly is "retained"?
Yes, the Fragment's state will be retained across the configuration change. Specifically, "retained" means that the fragment will not be destro...
How to see top processes sorted by actual memory usage?
I have a server with 12G of memory. A fragment of top is shown below:
12 Answers
12
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WCF vs ASP.NET Web API [closed]
...WCF Web API project (although some of the concepts have changed).
WCF was originally created to enable SOAP-based services. For simpler RESTful or RPCish services (think clients like jQuery) ASP.NET Web API should be good choice.
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In what cases could `git pull` be harmful?
... pull creates merge commits which add noise and complexity to the code history. In addition, pull makes it easy to not think about how your changes might be affected by incoming changes.
The git pull command is safe so long as it only performs fast-forward merges. If git pull is configured to onl...
How to send a “multipart/form-data” with requests in python?
How to send a multipart/form-data with requests in python? How to send a file, I understand, but how to send the form data by this method can not understand.
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