Swift - Putting Some Order in Your Data: Arrays(add a new item to a array(append method), map(anonymous function), join)

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.153)をSwiftで考えてみる。

SHARPEN YOUR PENCIL(p.153)

コード(Xcode)

main.swift

//
//  main.swift
//  sample153
//
//  Created by kamimura on 8/8/14.
//  Copyright (c) 2014 kamimura. All rights reserved.
//

import Foundation

var scores:[Int] = [
    60, 50, 60, 58, 54, 54, 58, 50, 52, 54,
    48, 69, 34, 55, 51, 52, 44, 51, 69, 64,
    66, 55, 52, 61, 46, 31, 57, 52, 44, 18,
    41, 53, 55, 61, 51, 44
]
var high_score :Int = 0
var bestsolutions:[Int] = []
var i = 0

for score:Int in scores {
    println("Bubble solution #\(i) score: \(score)")
    if score > high_score {
        high_score = score
    }
    i += 1
}

println("Bubbles tests: \(i)")
println("Highest bubble score: \(high_score)")

for i in 0..<scores.endIndex {
    if high_score == scores[i] {
        bestsolutions.append(i)
    }
}
let s = ", ".join(bestsolutions.map {
    (n:Int) -> String in
    return String(n)
    })

println("Best solutions: \(s)")

入出力結果(Console Output)

Bubble solution #0 score: 60
Bubble solution #1 score: 50
Bubble solution #2 score: 60
Bubble solution #3 score: 58
Bubble solution #4 score: 54
Bubble solution #5 score: 54
Bubble solution #6 score: 58
Bubble solution #7 score: 50
Bubble solution #8 score: 52
Bubble solution #9 score: 54
Bubble solution #10 score: 48
Bubble solution #11 score: 69
Bubble solution #12 score: 34
Bubble solution #13 score: 55
Bubble solution #14 score: 51
Bubble solution #15 score: 52
Bubble solution #16 score: 44
Bubble solution #17 score: 51
Bubble solution #18 score: 69
Bubble solution #19 score: 64
Bubble solution #20 score: 66
Bubble solution #21 score: 55
Bubble solution #22 score: 52
Bubble solution #23 score: 61
Bubble solution #24 score: 46
Bubble solution #25 score: 31
Bubble solution #26 score: 57
Bubble solution #27 score: 52
Bubble solution #28 score: 44
Bubble solution #29 score: 18
Bubble solution #30 score: 41
Bubble solution #31 score: 53
Bubble solution #32 score: 55
Bubble solution #33 score: 61
Bubble solution #34 score: 51
Bubble solution #35 score: 44
Bubbles tests: 36
Highest bubble score: 69
Best solutions: 11, 18
Program ended with exit code: 0