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What is the proper REST response code for a valid request but an empty data?
...ting me, but the rationale is still wrong. When receiving a 404 it doesn't mean the route doesn't make sense, it means there is no resource at that location. Full stop. This is true if you're requesting /badurl or /user/9 when such a user doesn't exist. A developer can help by adding a better reaso...
Fragment Inside Fragment
... native fragments on API Level 17 and higher -- you can nest fragments, by means of getChildFragmentManager(). Note that this means that you need to use the Android Support package version of fragments on API Levels 11-16, because even though there is a native version of fragments on those devices, ...
What's the difference between identifying and non-identifying relationships?
...erson.
A non-identifying relationship can be optional or mandatory, which means the foreign key column allows NULL or disallows NULL, respectively.
See also my answer to Still Confused About Identifying vs. Non-Identifying Relationships
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Difference between FetchType LAZY and EAGER in Java Persistence API?
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EAGER loading of collections means that they are fetched fully at the time their parent is fetched. So if you have Course and it has List<Student>, all the students are fetched from the database at the time the Course is fetched.
LAZY on the othe...
Binary Data in MySQL [closed]
...tter at all. Other factors such as centralisation, simplicity and backups mean that in this case storing in the database makes sense. Another common reason is replication.
– LaVache
Feb 15 '13 at 12:28
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Foreign key constraint may cause cycles or multiple cascade paths?
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@dumbledad: I mean, only use triggers when constraints (maybe on combination) can't get the job done. Constraints are declarative and their implementations are the responsibility of the system. Triggers are procedural code and you must cod...
Is there a builtin identity function in python?
...e used in most contexts as if it were multiple values. But doing that here means you get
>>> def mv_identity(*args):
... return args
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>>> mv_identity(1,2,3)
(1, 2, 3)
>>> # So far, so good. But what happens now with single arguments?
>>> mv_identity(1)
(1,...
How do I use Linq to obtain a unique list of properties from a list of objects?
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@masfenix Lazy eval means the operation is not done until it is actually used. In this case, the selecting the IDs and choosing only the distinct ones is not necessarily done when the statement in this answer is executed. It will be done when ...
JavaScript open in a new window, not tab
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And to be clear, I don't mean it's a javascript hack. Adding window height and width are clearly features of the js window.open method (w3schools.com/HTMLDOM/met_win_open.asp) I mean hack in the sense of manipulating the intended behavior of firefox....
Compare two DataFrames and output their differences side-by-side
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I believe "share the same index" means "make sure that index is sorted"...this will compare whatever is first in df1 to whatever is first in df2, regardless of the value of the index. JFYI in case I'm not the only person for which this wasn't obvious. ;D T...