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Commit 3ada203

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Day 11: Corporate Policy
1 parent 38a0f73 commit 3ada203

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‎day11/day11.xcodeproj/project.pbxproj

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‎day11/day11.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
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<plist version="1.0">
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<dict>
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<key>IDEDidComputeMac32BitWarning</key>
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<true/>
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</dict>
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</plist>

‎day11/day11/main.swift

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//
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// main.swift
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// day11
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//
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// Created by Tyler Kieft on 1/3/19.
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// Copyright © 2019 Tyler Kieft. All rights reserved.
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//
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import Foundation
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var password = "cqjxjnds"
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func incrementAscii(_ c: Character) -> String {
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let scalars = c.unicodeScalars
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return String(UnicodeScalar(scalars[scalars.startIndex].value + 1)!)
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}
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func increment(_ string: String) -> String {
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var newString = String()
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var increment = true
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var index = string.endIndex
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repeat {
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index = string.index(before: index)
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let c = string[index]
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if (increment) {
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if (c == "z") {
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newString.append("a")
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} else {
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newString.append(incrementAscii(c))
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increment = false
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}
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} else {
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newString.append(c)
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}
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} while index > string.startIndex
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return String(newString.reversed())
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}
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func isValid(_ password: String) -> Bool {
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if password.contains("i") { return false }
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if password.contains("l") { return false }
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if password.contains("o") { return false }
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var foundIncrease = false
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var increaseLength = 0
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var pairs = 0
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var lastPairC: Character? = nil
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var lastC: Character? = nil
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for c in password {
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if c == lastPairC {
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pairs += 1
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lastPairC = nil // so we don't overlap pairs
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} else {
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lastPairC = c
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}
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if lastC != nil && c.unicodeScalars[c.unicodeScalars.startIndex].value == lastC!.unicodeScalars[lastC!.unicodeScalars.startIndex].value + 1 {
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increaseLength = increaseLength + 1
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if increaseLength == 3 {
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foundIncrease = true
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}
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} else {
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increaseLength = 1
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}
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lastC = c
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}
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return foundIncrease && (pairs >= 2)
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}
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func nextPassword(_ password: String) -> String {
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var pass = password
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repeat {
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pass = increment(pass)
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} while !isValid(pass)
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return pass
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}
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password = nextPassword(password)
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print (password)
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password = nextPassword(password)
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print(password)

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