A way to easily compare a given value against an array of candidates

AnyOf.swift

import Foundation

struct EquatableValueSequence<T: Equatable> {
    static func ==(lhs: EquatableValueSequence<T>, rhs: T) -> Bool {
        return lhs.values.contains(rhs)
    }

    static func ==(lhs: T, rhs: EquatableValueSequence<T>) -> Bool {
        return rhs == lhs
    }

    fileprivate let values: [T]
}

func any<T: Equatable>(of values: T...) -> EquatableValueSequence<T> {
    return EquatableValueSequence(values: values)
}

let string = "Three"

// Instead of multiple conditions like this:

if string == "One" || string == "Two" || string == "Three" {

}

// You can now do:

if string == any(of: "One", "Two", "Three") {

}

Can I play, please please please, can I, please please? 😆

infix operator ∈
func ∈ <T: Equatable>(lhs: T, rhs: [T]) -> Bool {
  return rhs.contains(lhs)
}

2 ∈ [1,2,3] // true
string ∈ ["One", "Two", "Three"]

lol, dope! love the ∈

But... but... why not just ['One', 'Two', 'Three'].contains('One')?

@matt-curtis hahahahahaha.

The ∈ is really nice. But I guess I can only use it with the clipboard

真是脱裤子放屁——多此一举