toshi0383

{-|
 - Cryptography Week 1 Problem Set #7 | Corsera
 -
 - 1. Extract One-Time-Pad key from PT and CT pair.
 - 2. Encrypt a new message using the key.
 - 3. Print the result as a Hex String.
 -}

import Text.Printf (printf)
import Data.Bits (xor)

toshi0383

import Foundation
func combine<E1, E2>(_ arr1: [E1], _ arr2: [E2]) -> [(E1, E2)] {
    guard !arr1.isEmpty && !arr2.isEmpty else {
        return []
    }
    func _c(_ e1: E1, _ arr2: [E2]) -> [(E1, E2)] {
        return arr2.map{(e1, $0)}
    }
    return _c(arr1[0], arr2) + combine(arr1.dropFirst().map{$0}, arr2)
}

toshi0383

extension Array where Element: Equatable {
    typealias Enumerated = (Int, Element)
    func diff(fromNewArray newArray: [Element]) -> (added: [Enumerated], deleted: [Enumerated]) {
        // 削除分: newArrayにはないもの
        var added: [Enumerated] = []
        var deleted: [Enumerated] = []
        for (i, e) in newArray.enumerated() {
            guard i < self.count else {
                added.append((i, e))
                continue

toshi0383

Int(UINT64_MAX) // error: integer overflows when converted from 'UInt64' to 'Int'

let a = UINT64_MAX
Int(a) // Compiles. Why?

toshi0383

import Foundation

let a = (0..<UINT32_MAX).lazy.map{$0}
print(a.count)  // 4294967295
let b = (0..<INT64_MAX).lazy.map{$0}
print(b.count)  // 9223372036854775807
let bb = (0...INT64_MAX).lazy.map{$0}
print(bb.count) // <= EXC_BAD_INSTRUCTION
let c = (0..<UINT64_MAX).lazy.map{$0}
print(c.count)  // <= EXC_BAD_INSTRUCTION

toshi0383

let a = "89078"
for i in (0..<a.characters.count) {
//  let index: Int = i  // <= wrong!
    let index: String.CharacterView.Index =
        a.characters.index(a.startIndex, offsetBy: i)
    print(a[index])
}
// 8
// 9
// 0

toshi0383

let a = "89078"
for i in (0..<a.characters.count) {
//  let index: Int = i  // <= wrong!
    let index: String.CharacterView.Index =
        a.characters.index(a.startIndex, offsetBy: i)
    print(a[index])
}
// 8
// 9
// 0

toshi0383

import UIKit

UIControlState().rawValue      // 0
UIControlState.normal.rawValue // 0

enum A: OptionSet {
    typealias RawValue = Int
    case a, b
    var rawValue: Int {
        return 0

toshi0383

import Foundation
var done = false
DispatchQueue.main.async {
    print("hello")
    done = true
}
while !done {
    print("waiting... done:\(done)")
    sleep(1)
}

toshi0383

import PokemonKit

let a = PokeDeck(pokemons: [
    Pikachu(level: 1),
    Bulbasaur(level: 5),
    Pikachu(level: 11),
    Pikachu(level: 4),
    Pikachu(level: 20)
])