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What are the -Xms and -Xmx parameters when starting JVM?
Please explain the use of Xms and Xmx parameters in JVMs. What are the default values for them?
5 Answers
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Why is Hibernate Open Session in View considered a bad practice?
And what kind of alternative strategies do you use for avoiding LazyLoadExceptions?
9 Answers
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Copy and paste content from one file to another file in vi
I am working with two files, and I need to copy a few lines from one file and paste into another file. I know how to copy (yy) and paste (p) in the same file. But that doesn't work for different files. How is this done?
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How do I style a dropdown with only CSS?
...s very good browser support (caniuse) - except for Internet Explorer 11 (and later) and Firefox 34 (and later).
We can improve this technique and add support for Internet Explorer 10 and Internet Explorer 11 by adding
select::-ms-expand {
display: none; /* Hide the default arrow in Interne...
Why is the Java main method static?
...ntire class - sometimes you have an instance that hasn't been initialized, and you have to check for it in every method that could be called.
There are just too many edge cases and ambiguities for it to make sense for the JVM to have to instantiate a class before the entry point is called. That's ...
.c vs .cc vs. .cpp vs .hpp vs .h vs .cxx [duplicate]
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Historically, the first extensions used for C++ were .c and .h, exactly like for C. This caused practical problems, especially the .c which didn't allow build systems to easily differentiate C++ and C files.
Unix, on which C++ has been developed, has case sensitive file systems....
When is SQLiteOpenHelper onCreate() / onUpgrade() run?
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SQLiteOpenHelper onCreate() and onUpgrade() callbacks are invoked when the database is actually opened, for example by a call to getWritableDatabase(). The database is not opened when the database helper object itself is created.
SQLiteOpenHelper versi...
Practical uses of git reset --soft?
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git reset is all about moving HEAD, and generally the branch ref.
Question: what about the working tree and index?
When employed with --soft, moves HEAD, most often updating the branch ref, and only the HEAD.
This differ from commit --amend as:
it doesn't cre...
Reducing memory usage of .NET applications?
...memory footprint is all about demystifying the working set, process memory and how to perform accurate calculations on your total in-RAM consumption.
I will not say that you should ignore the memory footprint of your application -- obviously, smaller and more efficient does tend to be desirable. Ho...
Extracting bits with a single multiplication
I saw an interesting technique used in an answer to another question , and would like to understand it a little better.
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