You often have to make quick judgments about the number of objects you encounter in the world. You might see a group of people walking toward you. It is useful to know whether there are roughly five, ...

This is an example of overriding the application.yml file with the OS environment variables. Single or Array environment variables can be overridden. 4 and 5 are the most common use cases for ...

Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...

How to convert an object of objects (initial form of object) into object of arrays of objects (target form of object) I am interested in every way to do this, but I am particularly interested in ...