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What is a serialVersionUID and why should I use it?
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The docs for java.io.Serializable are probably about as good an explanation as you'll get:
The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserializa...
Why does Ruby have both private and protected methods?
...ed like this.
It is important to note that this is different from the way Java or C++ works. private in Ruby is similar to protected in Java/C++ in that subclasses have access to the method. In Ruby, there is no way to restrict access to a method from its subclasses like you can with private in Ja...
Android Endless List
....com/CyberEagle/OpenProjects/blob/master/android-projects/widgets/src/main/java/br/com/cybereagle/androidwidgets/helper/ListViewWithLoadingIndicatorHelper.java
- Helper to make it possible to use the features without extending from SimpleListViewWithLoadingIndicator.
https://github.com/CyberEagle/O...
Which version of the git file will be finally used: LOCAL, BASE or REMOTE?
...iles will exist, assuming that the name of the file in the repository is X.java: X.java, X.java.orig, X.java.BACKUP.#, X.java.BASE.#, X.java.LOCAL.#, X.java.REMOTE.#, where # is some number. Calling the merge result the BASE version is confusing; MERGED would be better.
– Teemu...
What is the difference between statically typed and dynamically typed languages?
... that you as the programmer must specify what type each variable is (e.g.: Java, C, C++); other languages offer some form of type inference, the capability of the type system to deduce the type of a variable (e.g.: OCaml, Haskell, Scala, Kotlin)
The main advantage here is that all kinds of checking...
Multiple queries executed in java in single statement
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Create a procedure with one or more select, and DML queries.
Call it from java using CallableStatement.
You can capture multiple ResultSets executed in procedure.
DML results can't be captured but can issue another select
to find how the rows are affected in the table.
Sample table and procedu...
How does the static modifier affect this code?
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In Java two phases take place: 1. Identification, 2. Execution
In identification phase all static variables are detected and initialized with default values.
So now the values are:
A obj=null
num1=0
num2=0
The second phase, ex...
Does the JVM prevent tail call optimizations?
...bproject's status is listed as "proto 80%"; it is unlikely to make it into Java 7, but I think it has a very good chance at Java 8.
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Java, Classpath, Classloading => Multiple Versions of the same jar/project
... that specific classloader tries to resolve a class name.
According to the java language specification, there is not a uniqueness constraint for a class binary name, but as far as I can see, it should be unique for each classloader.
I can figure out a way to load two classes with the same binary n...
How to exclude certain directories/files from git grep search
...if you want to search for foobar in every file except for those matching *.java you can do:
git grep foobar -- './*' ':(exclude)*.java'
Or using the ! "short form" for exclude:
git grep foobar -- './*' ':!*.java'
Note that in git versions up to v2.12, when using an exclude pathspec, you must h...