Where, when and for what we can use Bitwise operators in while code.

Question

https://www.sololearn.com/post/23827/?ref=app

FYI, I know what is Bitwise operators.

I need real time examples!!

Thanks

Answer 1

One of the usages is to encode several error codes into one return code.
For example:
00000001 -> parameter1 is missing
00000010 -> parameter2 is missing
00000100 -> connection pool is empty
00001000 -> file not found
...

If you want to combine several error codes (binary numbers in the examples above) into one return code, you can OR all of the needed error codes.

If you want to check whether the return code include a particular error, you just AND the return code with that error code. If the result is not 0, it means that your result include that error...

Answer 2

I happened to use bit-bitwise ops to check if i hadn't used some items in a list of given items. You can take a look at the method findAuxiliaryPeg() in the following code snippet.

https://code.sololearn.com/cDhJwN4VHk0B/?ref=app