Golang : Convert slice to array

For new comer to Golang, slice and array can be confusing sometimes. In a nutshell, a slice length(size) is flexible and array length(size) is not. Since they are different, many assume that by using the = operator, a new array will be populated with the elements from a slice.

To convert a slice to array properly, use the builtin copy() function.

For example :

 package main

 import "fmt"

 func main() {

  slice := []byte("abcd1234")

  var arr [8]byte

  copy(arr[:], slice[:8])

  fmt.Println(string(arr[:])) // []byte to string


Sample output :

[97 98 99 100 49 50 51 52]


  See also : Golang : Convert string to array/slice

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.