How to Extract Bit Representations from Bytes in Go?

How to Retrieve Bit Representations from Bytes in Go

Problem:

Determine the bit representation of a byte, such as getting "00000001" from byte(1).

Solution:

There are two approaches to extracting bit representations:

1. Visual Representation Using Formatting:

   • Use fmt.Sprintf("b", ...). This generates a string representation of the byte's bits with leading zeros to ensure an 8-bit format.

2. Bitwise Operations for Mathematical Operations:

   • Calculate specific bits using bitwise AND operators.
   • Create a mask by setting the desired bit to 1 and the others to 0 (2^n-1).
   • Perform bitwise AND of the byte and the mask.
   • If the result equals the mask, the bit is 1; otherwise, it is 0.

Example:

To find the bits of byte(13):

<code class="go">fmt.Print(13 & 1) // Output: 1
fmt.Print(13 & 2) // Output: 0
fmt.Print(13 & 4) // Output: 4
fmt.Print(13 & 8) // Output: 8</code>

This demonstrates that the bit representation of 13 is "00001101".

Additional Note:

For calculating Hamming distance between bytes, the provided code uses bitwise operations to compare each bit individually. The function counts the number of mismatched bits and returns the distance.

The above is the detailed content of How to Extract Bit Representations from Bytes in Go?. For more information, please follow other related articles on the PHP Chinese website!