Sha256: 91c4b26315d4b4052b800a7b7c022998670ea4eac8f561ce50c0037245d02e46
Contents?: true
Size: 1.45 KB
Versions: 396
Compression:
Stored size: 1.45 KB
Contents
struct Queens {
enum InitError: Error {
case sameSpace
case incorrectNumberOfCoordinates
case invalidCoordinates
}
let white: [Int]
let black: [Int]
var canAttack: Bool {
return onHorizontal || onVertical || onDiagonal
}
private var onHorizontal: Bool {
return white[0] == black[0]
}
private var onVertical: Bool {
return white[1] == black[1]
}
private var onDiagonal: Bool {
return abs(black[1] - black[0]) == abs(white[1] - white[0])
}
init(white: [Int] = [0, 3], black: [Int] = [7, 3]) throws {
guard white.count == 2 && black.count == 2 else {
throw InitError.incorrectNumberOfCoordinates
}
for number in white + black {
guard number >= 0 && number <= 7 else {
throw InitError.invalidCoordinates
}
}
guard white != black else {
throw InitError.sameSpace
}
self.white = white
self.black = black
}
}
extension Queens: CustomStringConvertible {
var description: String {
let row = [String](repeating: "_", count: 8)
var board = [[String]](repeating: row, count: 8)
board[white[0]][white[1]] = "W"
board[black[0]][black[1]] = "B"
var rows = [String]()
for row in board {
rows.append(row.joined(separator: " "))
}
return rows.joined(separator: "\n")
}
}
Version data entries
396 entries across 396 versions & 1 rubygems