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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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@Arthur Ronald what happens if there is a Version annotation in the entity called by getReference?
– David Hofmann
Mar 25 '16 at 13:28
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What is the proper REST response code for a valid request but an empty data?
...browser in response to a GET.
The other response codes that are even less appropriate than 204 and 404:
200 should be returned with the body of whatever you successfully fetched. Not appropriate when the entity you're fetching doesn't exist.
202 is used when the server has begun work on an objec...
Stack vs heap allocation of structs in Go, and how they relate to garbage collection
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It's worth noting that the words "stack" and "heap" do not appear anywhere in the language spec. Your question is worded with "...is declared on the stack," and "...declared on the heap," but note that Go declaration syntax says nothing about stack or heap.
That technically makes t...
Is XSLT worth it? [closed]
...f your team working with just XML.
A real world use case: I just wrote an app which handles in-memory XML docs throughout the system, and transforms to JSON, HTML, or XML as requested by the end user. I had a fairly random request to provide as Excel data. A former colleague had done something simi...
What are the differences between Perl, Python, AWK and sed? [closed]
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In order of appearance, the languages are sed, awk, perl, python.
The sed program is a stream editor and is designed to apply the actions from a script to each line (or, more generally, to specified ranges of lines) of the input file or...
Call Go functions from C
...f your package to supply a custom callback function, we use the exact same approach as above, but we supply the user's custom handler (which is just a regular Go function) as a parameter that is passed onto the C side as void*. It is then received by the callbackhandler in our package and called.
L...
Logging levels - Logback - rule-of-thumb to assign log levels
...soon be) and the fix probably requires human intervention. The "2AM rule" applies here- if you're on call, do you want to be woken up at 2AM if this condition happens? If yes, then log it as "error".
warn: an unexpected technical or business event happened, customers may be affected, but probably ...
Fragment onCreateView and onActivityCreated called twice
I'm developing an app using Android 4.0 ICS and fragments.
5 Answers
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What are the use cases of Graph-based Databases (http://neo4j.org/)? [closed]
...s into the relational model, use a relational database if you can. If your application doesn't fit the relational model but it does fit the graph model, use a graph database. If it only fits something else, use that.
If your application doesn't need to fit into the current blub architecture, use a ...
When should I use OWIN Katana?
...ut OWIN, the asp.net bits are coupled to the way IIS communicates with the application. OWIN abstracts web servers and framework components. That means that your application code will now be aware of the OWIN interface, but not of the webserver that is serving the request.
In return, applications c...