Reduce implicit parameter passing

This rule suggests methods should always use explicit parameters. In some situations, instance variables are treated like global variables and are used as implicit parameters among methods within the same class. Implicit parameters tie methods to the class, and it also hides the necessary information from outsiders who wish to use the method.

The undesired results of using implicit parameters are

• making it difficult to split a class into parts
• leading other programmers to misuse methods as they may not be aware of all implicit parameters

Changing the implicit parameters to explicit parameters will overcome these problems, although beware of too many parameters.

Example

To do.