How to Convert a Fixed-Size Array to a Slice in Go?

Converting a Fixed-Size Array to a Variable-Sized Array in Go

When working with arrays in Go, it's often necessary to convert fixed-size arrays to variable-sized arrays (slices). However, attempting to directly assign a fixed-size array to a slice may result in an error, as seen in the example below:

package main

import (
    "fmt"
)

func main() {
    var a [32]byte
    b := []byte(a)
    fmt.Println(" %x", b)
}

The compiler would throw an error:

./test.go:9: cannot convert a (type [32]byte) to type []byte

To successfully convert a fixed-size array to a slice, you can use the expression b := a[:]. This will create a slice that references the underlying array, without making a copy:

b := a[:]

Additional Resources:

Refer to the following blog post for a detailed discussion on the differences between arrays and slices in Go:

• [Arrays vs Slices in Go](https://blog.logrocket.com/understanding-arrays-versus-slices-in-go/)

The above is the detailed content of How to Convert a Fixed-Size Array to a Slice in Go?. For more information, please follow other related articles on the PHP Chinese website!