How do you conform protocol to Equatable?

You just have to wrap the protocol type in a type eraser instance. Note that since the type eraser conforms to the protocol, you can use instances of the type eraser anywhere an instance of the protocol type is expected.

What is equitable protocol?

The Equatable protocol is what allows two objects to be compared using == , and it’s surprisingly easy to implement because Swift does most of the work for you by default. Put that inside the Person struct. Because that’s your own function you can make it do any comparisons you like.

What is Equatable and comparable?

“Equatable” relates to being equal, and “comparable” relates to the comparison between objects.

What is comparable protocol in Swift?

The Comparable protocol allows use to use the < , > , <= , and >= operators with conforming data types, which in turn means that Swift knows how to sort arrays of those types.

How do you compare two protocols?

Comparing Protocols

1. Open your source protocol so it is active in the workspace. (If you have more than one protocol open, click the one you want to compare in the Protocol task bar, so it is active in the workspace.)
2. In the toolbar, click Compare Protocols .
3. Select your comparison protocol.

What does Equatable mean in Swift?

In the Swift standard library, Equatable is a type without an equal; Comparable a protocol without compare. Take care to adopt them in your own types as appropriate and you’ll benefit greatly.

Can a protocol be Equatable Swift?

The short answer is that we can’t. Each conforming type can be Equatable (in fact both our concrete types are) but we don’t have a way of checking equality at the level of the protocol since the protocol does not declare any properties.

How do I compare two objects in Swift?

When you need to compare two custom objects, you have to provide the custom implementation of the comparison operator through the Equatable protocol. In Java, you would override the equals method instead. Making your class compliant with the Equatable protocol is the only way two objects should be compared by value.

What is comparable Equatable in Swift?

Comparable Benefits In the Swift standard library, Equatable is a type without an equal; Comparable a protocol without compare. Take care to adopt them in your own types as appropriate and you’ll benefit greatly.

What does === mean in Swift?

The identical-to operator ( === ) returns false when comparing two references to different object instances, even if the two instances have the same value.

How do I compare references in Swift?

!== and === are identity operators and are used to determine if two objects have the same reference. Swift also provides two identity operators (=== and ! ==), which you use to test whether two object references both refer to the same object instance.

What is Equatable in Swift?