How Do I Efficiently Convert a Byte Array to a Comma-Separated String in Go?

Converting Bytes to Strings in Go

In Go, you may encounter the need to convert an array of bytes to a single string. While the intuitive approach of casting the byte array directly to a string (e.g., str = string(bytes[:])) may seem straightforward, it yields an incorrect result.

Solution:

To achieve this conversion, you can harness the power of the strconv and strings packages. Here's an efficient solution:

func convert(b []byte) string {
    s := make([]string, len(b))
    for i := range b {
        s[i] = strconv.Itoa(int(b[i]))
    }
    return strings.Join(s, ",")
}

Usage:

Once you have defined the convert function, you can utilize it like so:

bytes := [4]byte{1, 2, 3, 4}
str := convert(bytes[:])

This will return a string containing the individual byte values separated by commas, resulting in the desired output: "1,2,3,4".

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