Swift Advanced Operators
No iPad Pro today, so I decided to cheer you all up with a third bytes for beginners post instead. Hopefully it will keep you occupied while you wait for Yosemite to appear in your updates on the App Store.XOR (^)
In this example, the blue and green rows are independent of one another while the grey row is the resulting XOR. A XOR is an 'exclusive' OR, or to put it simply an OR that returns a 0 bit where both numbers have either a 0 or a 1 in the same position as one another. But returns a 1 if only one of the numbers contains a 1 in that bit position. This is demonstrated in the interactive example below.| 0b | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Val | ||||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||
| 0b | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Val | ||||||||
| 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | 255 | |||||||||
Result | |||||||||||||||||
| 0b | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | Val | ||||||||
| 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | 255 | |||||||||
You can change the numbers by clicking on the blue or green squares. The blue and green rows display 8-bit binary numbers. The grey row is the resulting XOR.
What's next?
Bit shifting coming soon.
