Swift - Putting Some Order in Your Data: Arrays( Control Flow(for loop(for/in)), startIndex, endIndex, Range(including, excluding))

The Swift Programming Language
Apple Inc.

開発環境

• OS X Mavericks - Apple(OS)
• Xcode 6.0 Beta
• Swift (プログラミング言語)

Head First JavaScript Programming (Eric T. Freeman (著)、 Elisabeth Robson (著)、 O'Reilly Media )のChapter 4(Putting Some Order in Your Data: Arrays)、SHARPEN YOUR PENCIL(p.141)をSwiftで考えてみる。

SHARPEN YOUR PENCIL(p.141)

コード(Xcode)

main.swift

//
//  main.swift
//  sample141
//
//  Created by kamimura on 8/6/14.
//  Copyright (c) 2014 kamimura. All rights reserved.
//

import Foundation

var products = ["Choo Choo Chocolate", "Icy Mint", "Cake Batter", "Bubblegum"]
var hasBubbleGum = [false, false, false, true];
var i = 0;
let start = hasBubbleGum.startIndex
let end = hasBubbleGum.endIndex

for i in start..<end {
    if hasBubbleGum[i] {
        println("\(products[i]) contains bubble gum")
    }
}

for i in start...(end - 1) {
    if hasBubbleGum[i] {
        println("\(products[i]) contains bubble gum")
    }
}

入出力結果(Console Output)

Bubblegum contains bubble gum
Bubblegum contains bubble gum
Program ended with exit code: 0