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What does “connection reset by peer” mean?
...rs when a packet is sent from your end of the connection but the other end does not recognize the connection; it will send back a packet with the RST bit set in order to forcibly close the connection.
This can happen if the other side crashes and then comes back up or if it calls close() on the s...
IntelliJ does not show 'Class' when we right click and select 'New'
...is not acceptable. For example, creating a project with spaces in the name does not block the project creation but the proper sources are not marked and when those are marked manually, I still was unable to create classes. Recreating the project with hyphens (-) instead of spaces corrected the probl...
Why does integer overflow on x86 with GCC cause an infinite loop?
...compiler isn't actively looking for undefined behavior, it assumes that it doesn't occur. This allows the compiler to optimize the code. For example, instead of computing for (j = i; j < i + 10; ++j) ++k;, it will just set k = 10, since this will always be true if no signed overflow occurs.
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What is the difference between UNION and UNION ALL?
...plicate records (where all columns in the results are the same), UNION ALL does not.
There is a performance hit when using UNION instead of UNION ALL, since the database server must do additional work to remove the duplicate rows, but usually you do not want the duplicates (especially when developi...
Does a finally block always run?
... finally {
System.out.println("bye");
} // try-finally
"bye" does not print out in above code.
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What did MongoDB not being ACID compliant before v4 really mean?
...ess than ideal, but its the only part of a large application where mongodb does not fit the need perfectly. Plus, it works flawlessly thus far. This may not be possible for many scenarios, but because of the document structure I am using, it fits well.
2) Use a transactional database in conjuncti...
What does mvn install in maven exactly do
...ght be aware of, Maven is a build automation tool provided by Apache which does more than dependency management. We can make it as a peer of Ant and Makefile which downloads all of the dependencies required.
On a mvn install, it frames a dependency tree based on the project configuration pom.xml on...
Better way to cast object to int
...want to throw some attention to Darren Clark's response because I think it does a good job addressing the specifics here, but came in late and wasn't voted as well yet. He gets my vote for "accepted answer", anyway, for also recommending (int), for pointing out that if it fails (int)(short) might w...
Should commit messages be written in present or past tense? [closed]
...it messages in present tense. That way the message describes what the diff does (because you might pull that diff or even that whole commit into a different branch). Thus, the commit message does not describe what it "did" do... It describes what the commit itself "does" do. So it should be in prese...
What are the differences between concepts and template constraints?
...nstraints attempt to answer the following kinds of questions about type:
Does this type have such-and-such operator overloaded?
Can these types be used as operands to this operator?
Does this type have such-and-such trait?
Is this constant expression equal to that? (for non-type template arguments...