Knowledge
Enumerations
Subject: .../Programming languages
Materials
Tutorial
PHP: Enumerations - Manual
Enumerations, or "Enums" allow a developer to define a custom type that is limited to one of a discrete number of possible values. That can be especially helpful when defining a domain model, as it enables "making invalid states unrepresentable."
Skillsets
Question
Questions are very useful when trying to understand if you know the subject
Do you know that ...?
Any useful or interesting facts about the skill. Any peace of information would be useful