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Describe the architecture you use for Java web applications? [closed]
...transactions upon entering the service layer, propagating down to the DAO call's. The Service layer has the most bussines model knowledge, and the DAO's do relatively simple CRUD work.
Some more complicated query stuff is handled by more complicated queries in the backend for performance reasons.
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Move the most recent commit(s) to a new branch with Git
... checking out the branch you made. So how do the commits you removed magically show up in the new branch?
– Jonathan Dumaine
Aug 3 '10 at 18:28
143
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Why is Linux called a monolithic kernel?
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A monolithic kernel is a kernel where all services (file system, VFS, device drivers, etc) as well as core functionality (scheduling, memory allocation, etc.) are a tight knit group sharing the same space. This directly opposes a microkernel.
A microkernel prefe...
implements Closeable or implements AutoCloseable
...ources which needs to be closed.
In your implementation, it is enough to call pw.close(). You should do this in a finally block:
PrintWriter pw = null;
try {
File file = new File("C:\\test.txt");
pw = new PrintWriter(file);
} catch (IOException e) {
System.out.println("bad things happen")...
How can I check MySQL engine type for a specific table?
... database contains several tables using different storage engines
(specifically myisam and innodb). How can I find out which tables are
using which engine?
...
Can I use non existing CSS classes?
... of rules for handling parsing errors, none of which concern the markup at all. Essentially, this means HTML and CSS are completely independent of each other in the validity aspect.1
Once you understand that, it becomes clear that there is no side effect of not defining a .target rule in your style...
What are -moz- and -webkit-? [duplicate]
..., Safari; -moz for Firefox, -o for Opera, -ms for Internet Explorer). Typically they're used to implement new, or proprietary CSS features, prior to final clarification/definition by the W3.
This allows properties to be set specific to each individual browser/rendering engine in order for inconsist...
Java 8 Distinct by property
...ey(Person::getName))
Note that if the stream is ordered and is run in parallel, this will preserve an arbitrary element from among the duplicates, instead of the first one, as distinct() does.
(This is essentially the same as my answer to this question: Java Lambda Stream Distinct() on arbitrary ...
Difference between SPI and API?
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The API is the description of classes/interfaces/methods/... that you call and use to achieve a goal, and
the SPI is the description of classes/interfaces/methods/... that you extend and implement to achieve a goal.
Put differently, the API tells you what a specific class/method does for you, ...
Python: Check if one dictionary is a subset of another larger dictionary
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Convert to item pairs and check for containment.
all(item in superset.items() for item in subset.items())
Optimization is left as an exercise for the reader.
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