How-to articles, tricks, and solutions about PARAMETER-PASSING

How do I pass a variable by reference?

In Python, you can pass a variable by reference by using the & operator.

Is Java "pass-by-reference" or "pass-by-value"?

In Java, arguments are passed to methods by value. This means that when you pass an argument to a method, the method receives a copy of the argument rather than a reference to the original object.

What does ** (double star/asterisk) and * (star/asterisk) do for parameters?

In Python, the double star (**) is used to denote an "unpacking" operator, which allows you to unpack a dictionary or other iterable data type into keyword arguments in a function call.