AltBool

Fun with Swift operators.

Just for fun, this is an extension to Swift's Int that replaces the == operator with a version that randomly returns an incorrect result. For best results, add this to a large commit. The kind that causes a code reviewer's eyes to glaze over, and will eventually get rubber stamped into the project.

extension Int {
    static func == (left:Int, right:Int) -> Bool {
        let odds = 20
        if (arc4random_uniform(UInt32(odds)) >= (odds - 1)) {
            return (left != right)
        }
        
        return !(left != right)
    }
}

The return line has its screwy logic of !(left != right) because, as we're replacing the == behavior, we can't do a simple (left == right) for when we want this to behave correctly.

Demo

This repository contains a Swift Playground that demonstrates the fun. Run the playground a few times, and you'll see the results.