How to Convert a Fixed-Sized Byte Array to a String in Go?

Converting Sized Byte Array to String in Go

In Go, it is common to encounter situations where you need to convert a sized byte array to a string. This can arise, for instance, when working with hashed data such as MD5 digests.

Consider the following code snippet:

data := []byte("testing")
var pass string
var b [16]byte
b = md5.Sum(data)
pass = string(b)

Upon executing this code, you will encounter the following error:

cannot convert b (type [16]byte) to type string

The error stems from the fact that the string conversion expects a byte slice ([]byte), but the variable b is declared as a fixed-size array ([16]byte). To resolve this issue and convert the byte array to a string, you can utilize a byte slice derived from the byte array.

The following code demonstrates how to convert a sized byte array to a string correctly:

pass = string(b[:])

By using b[:], you are creating a byte slice that encompasses the entire byte array b. This byte slice can then be converted to a string as expected.

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