Self or self in Swift Code?

That capital letter makes a real difference

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What is self?

self (with a lowercase s) is a property of an instance that holds the instance itself. This means `self` can refer to any current object.

self is a common sight in much Swift code. Yes, since Swift 5.3 we do not have to explicitly declare self on a value type.

What? What is Self?

self (with a lowercase s) is an object. It can represent a struct, class or property.

Self (with an uppercase S) is a type. This means that Self can mean any current type.