In computing, particularly in object-oriented programming, an instance is a specific occurrence of a class. It is also known as an object. When you create an instance of a class, you are creating a new object that has all the properties and methods of the class.Essentially, an instance is a concrete representation of a class. It is a unique entity that has its own set of data and behavior. Instances can be created and destroyed at runtime.
Checking if a value is saved to an instance is important because it allows you to determine whether or not the value has been persisted to the database. This is important for ensuring that data integrity is maintained, allowing you to prevent errors when working with live data. Being able to understand how to check if a value is saved to the instance allows you to create more robust and reliable applications.
