【初心者向け？】map メソッドで既存配列から違う型の配列を作る方法 ref: http://qiita.com/lovee/items/0ee298443e4225f3cb3e

file0.c

    int arrayA[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
    int arrayB[10];

    for (int i = 0; i < 10; i++) {
        arrayB[i] = arrayA[i] * arrayA[i];
    }

file1.swift

let arrayA = [Int](0 ..< 10)
var arrayB = [Int]()

for element in arrayA {
    arrayB.append(element * element)
}

file2.swift

let arrayA = [Int](0 ..< 10)
let arrayB = arrayA.map{$0 * $0}

file3.swift

let arrayA = [Int](0 ..< 10)
let arrayB = arrayA.map{ (element: Int) -> Double in
    let value = sqrt(Double(element))
    return value
}

file4.swift

let baseView = UIView(frame: CGRectMake(0, 0, 1920, 1080))

let viewTags = [Int](0 ..< 10)

for tag in viewTags {
    let view = UIView(frame: baseView.frame)
    view.tag = tag
    baseView.addSubview(view)
}

//いろいろ操作

let animationViews = viewTags.filter{$0 % 3 == 0}.map{ (tag: Int) -> UIView in
    let view = baseView.viewWithTag(tag)!
    return view
}

UIView.animateWithDuration(1.5, animations: { () -> Void in
    for view in animationViews {
        view.alpha = 0
    }
})