[swift] index out of range error // beginner.

// The factor that this function receives is the value of ladderHeight with the player value, and the value of ladderHeight with the index out of range error.
func preparadeToMakeFootBoard(_ ladderHeight: Int, _ player: Int) -> [[Bool]] {
    var arrLadder = makeLadderFrame(player,ladderHeight)
    for row in 0 ..< ladderHeight {
        arrLadder[row] = randomChange(arrLadder[row])
    }
    return arrLadder
}

//
let readyFootBoard = preparadeToMakeFootBoard(player, ladderHeight)

// Corrected source 
//
//  //  main.swift
//  //  af
//
//  //  Created by maccli1 on 2018. 1. 22..
//  Copyright © 2018 my young. All rights reserved.
//

import Foundation

// Get Participant Input
func getPlayer() -> Int {
    print("How many people will participate?")
    let player = readLine()
    return Int(player ?? "") ?? 0
}

// Get ladder height input
func getLadderHeight() -> Int {
    print("What is the maximum ladder height?"")
    let ladderHeight = readLine()
    return Int(ladderHeight ?? "") ?? 0
}

// Ladder scaffolding preparation - serve
// An array with a false value is randomly changed from false to true according to a random value
func randomChange(_ arrLadder:[Bool]) -> [Bool]{
    var ladderArr:[Bool] = arrLadder

    for val in 0 ..< ladderArr.count {
        let random = arc4random_uniform(2)
        ladderArr[val] = (random == 0)
    }
    return ladderArr
}

// Ladder scaffolding preparation - main
func makeLadderFrame(_ player:Int, _ ladderHeight:Int) -> [[Bool]] {
    let arrLadder: [[Bool]] = Array(repeating: Array(repeating: false, count: player), count: ladderHeight)
    return arrLadder
}

func preparadeToMakeFootBoard(_ player: Int, _ ladderHeight: Int) -> [[Bool]] {
    var arrLadder = makeLadderFrame(player,ladderHeight)
    for row in 0 ..< ladderHeight {
        arrLadder[row] = randomChange(arrLadder[row])
    }
    return arrLadder
}

// Making a ladder scaffold
// scaffolding element
enum LadderFootBoardElements: String {
    case hasFootBoard = "-"
    case noFootBoard = " "
}

// Replace the non-value two-dimensional array created by readyToMakeFootBoard with scaffolding elements
func transferBoolToHorizon(booleanElement: Bool) -> String {
    return booleanElement ? LadderFootBoardElements.hasFootBoard.rawValue : LadderFootBoardElements.noFootBoard.rawValue
}

// Completing the Ladder Shape - Serve
func makeWall(_ readyFootBoard:[Bool],_ player: Int) {
    for val in 0 ..< player {
        let footboard = transferBoolToHorizon(booleanElement: readyFootBoard[val])
        print ("\(footboard)", terminator : "|")
    }
}

// Completing the Ladder Shape - Main
func makeLadder(_ player: Int, _ ladderHeight:Int) {
    let readyFootBoard = preparadeToMakeFootBoard(player, ladderHeight)
    for row in 0 ..< ladderHeight {
        print ("|", terminator: "")
        makeWall(readyFootBoard[row], player)
        print()
    }
}

// main (executive)
while true {
    let player = getPlayer()
    let ladderHeight = getLadderHeight()
    makeLadder(player, ladderHeight)

    break
}

// result value
How many people will participate?
3
What is the maximum ladder height?
4
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