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| import Foundation | |
| enum Pixel: Int { | |
| case black = 0 | |
| case white = 1 | |
| case transparent = 2 | |
| } | |
| let width = 25 | |
| let height = 6 | |
| let size = width * height | |
| let input = try | |
| String(contentsOfFile: "data.txt") | |
| .trimmingCharacters(in: .whitespacesAndNewlines) | |
| input | |
| .enumerated() | |
| .reduce(into: Array(repeating: [Pixel](), count: input.count / size)) { partial, current in | |
| let pixel = Pixel(rawValue: Int(String(current.1))!)! | |
| partial[current.0 / size].append(pixel) | |
| } | |
| .reduce(into: Array(repeating: Pixel.transparent, count: size)) { partial, layer in | |
| for (idx, pixel) in layer.enumerated() { | |
| if pixel != .transparent && (partial[idx] == .transparent) { | |
| partial[idx] = pixel | |
| } | |
| } | |
| } | |
| .enumerated() | |
| .forEach { | |
| if $0.0 != 0 && $0.0 % width == 0 { print("") } | |
| print($0.1 == .white ? "█" : " ", terminator: "") | |
| } |
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