SwiftFoxx

# Terminal Cheat Sheet

pwd         # print working directory
ls          # list files in directory
cd          # change directory
~           # home directory
..          # up one directory
-           # previous working directory
help        # get help
-h          # get help

SwiftFoxx

extension CGImage {
    var isDark: Bool {
        get {
            guard let imageData = self.dataProvider?.data else { return false }
            guard let ptr = CFDataGetBytePtr(imageData) else { return false }
            let length = CFDataGetLength(imageData)
            let threshold = Int(Double(self.width * self.height) * 0.45)
            var darkPixels = 0
            for i in stride(from: 0, to: length, by: 4) {
                let r = ptr[i]