8r14z / fckinequatable

The other way to deal with Equatable

FckinEquatable

A new way to deal with Equatable.

Provide a new protocol name FckinEquatable.

This is also an example for overloading operator in Swift. You can easily create your own operator.

protocol FckinEqualtable {
    func equalToAll(_ array: [Self]) -> Bool
    func equalToOne(_ array: [Self]) -> Bool
}

With default implementation (protocol extension), you will have this ability for free with just doing something like below:

extension String: FckinEqualtable { }

Provide 2 default operators:

infix operator =&=
infix operator =|=

You can custom your own

equalToAll is equivalent to =&=

equalToOne is equivalent to =|=

Example

if str != "string1" && str != "string2" && str != "string3" {
  // Do something
}

With FckinEquatable

let array = ["string1", "string2", "string3"]
if !str.equalToOne(array) {
  // Do something
}

OR

if !(str =|= array) {
  // Do something
}