Question

How to bitwise inverse the bits of a number in Swift

Answer 1

import Foundation

let number = 153

print(String(number & 0xFFFFFFFF, radix: 2).padLeft(toLength: 32, withPad: "0"))
print(number)

let invertedNumber = ~number

print(String(invertedNumber & 0xFFFFFFFF, radix: 2).padLeft(toLength: 32, withPad: "0"))
print(invertedNumber)

extension String {
    func padLeft(toLength length: Int, withPad pad: String) -> String {
        return self.count < length ? String(repeating: pad, count: length - self.count) + self : self
    }
}




/*
run:

00000000000000000000000010011001
153
11111111111111111111111101100110
-154

*/

 

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