SwiftArraySample.swift

let numbers = [0,1,2,3,4,5]

var sum = { (a:Int, b:Int) -> Int in
    a + b
}


var odd = { (number:Int) -> Bool in
    number % 2 != 0
}

var multiply = { (number:Int) -> Int in
    number * 2
}

numbers.reduce(0, combine: sum)
numbers.filter(odd)
numbers.map(multiply)