swiftToRuby.swift

extension Int {
    func times(block: () -> ()) {
        for _ in 0..self {
        block()
        }
    }
    
    func times(block: (Int) -> ()) -> Int {
        for i in 0..self {
            block(i)
        }
        return self
    }
}

3.times { print("Ho, ") }

var x = 5.times {(i: Int) in println("Iteration \(i)") }

extension Array {
    func each(block: (T -> ())) -> Array<T> {
        for item in self {
            block(item)
        }
        return self
    }
}

var y  = ["Hello", "World"].each { house in println("House \(house)")}

extension Dictionary {
    func eachPair(block: (KeyType, ValueType) -> ()) -> Dictionary<KeyType, ValueType> {
        for (key, val) in self {
            block(key, val)
        }
        return self
    }
}

let mealPlan = [ "breakfast": "pancakes", "lunch": "burrito", "dinner": "steak"]

mealPlan.eachPair {
    meal, item in println("Having \(meal) for \(item)")
}

http://benscheirman.com/2014/06/implementing-ruby-style-iteration-in-swift/