How to Extract Bit Representations from Bytes in Go?

Patricia Arquette
Release: 2024-11-04 02:49:02
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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 (2n-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>
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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.

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