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When to use EntityManager.find() vs EntityManager.getReference() with JPA
...= persistenceContext.getEntity( keyToLoad );
2) If we don't effectively manipulate the entity, echoing to the lazily fetched of the javadoc.
Indeed, to ensure the effective loading of the entity, invoking a method on it is required.
So the gain would be related to a scenario where we want to load ...
What does an exclamation mark mean in the Swift language?
...est reputations from it in Stackoverflow :)
I misunderstood a little the meaning of unwrapping at that time. Now after 4 years I believe the meaning of unwrapping here is to expand the code from its original compact form. Also it means removing the vagueness around that object, as we are not sure by...
HTML 5 Favicon - Support?
...ndroid Chrome expects a 192x192 icon, but it favors the icons declared in manifest.json if it is present. Plus, Chrome uses the Apple Touch icon for bookmarks.
Coast by Opera expects a 228x228 icon.
Google TV expects a 96x96 icon.
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What is the JSF resource library for and how should it be used?
The JSF <h:outputStylesheet> , <h:outputScript> and <h:graphicImage> components have a library attribute. What is this and how should this be used? There are a lot of examples on the web which use it as follows with the common content/file type css , js and img (or ima...
What does `someObject.new` do in Java?
In Java, I have just found out that the following code is legal:
5 Answers
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How to read the output from git diff?
...lines) in that 'version' of the file". It is important to understand the meaning of the +, -, and <whitespace> at the beginning of those lines, as it applies to the interpretation of hunks. A more visual example: youtube.com/watch?v=1tqMjJeyKpw
– Damilola Olowookere
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How to REALLY show logs of renamed files with git?
...You put content in a git repository because the content as a whole has a meaningful history.
A file rename is a small special case of "content" moving between paths. You might have a function that moves between files which a git user might trackdown with "pickaxe" functionalitly (e.g. log -S).
Oth...
mongoose vs mongodb (nodejs modules/extensions), which better? and why?
I've just arrived to Node.js and see that there are many libs to use with the MongoDB, the most popular seem to be these two: (mongoose and mongodb). Can I get pros and cons of those extensions? Are there better alternatives to these two?
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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
I'm new to Go and I'm experiencing a bit of congitive dissonance between C-style stack-based programming where automatic variables live on the stack and allocated memory lives on the heap and and Python-style stack-based-programming where the only thing that lives on the stack are references/pointer...
Understanding the Event Loop
...here are actually several threads handling operation of the event loop mechanism, and this includes a pool of IO threads and a handful of others. The key is the number of these threads does not correspond to the number of concurrent connections being handled like they would in a thread-per-connectio...