How to split a slice of bytes in Golang?

26 Aug, 2019
In Go language slice is more powerful, flexible, convenient than an array, and is a lightweight data structure. The slice is a variable-length sequence which stores elements of a similar type, you are not allowed to store different type of elements in the same slice.In the Go slice of bytes, you are allowed to split the given slice using a Split() function. This function splits a slice of bytes into all subslices separated by the given separator and returns a slice which contains all these subslices. It is defined under the bytes package so, you have to import bytes package in your program for accessing Split function.
Syntax:
func Split(o_slice, sep []byte) [][]byte
Here, o_slice is the slice of bytes and sep is the separator. If the sep is empty, then it will split after each UTF-8 sequence. Let us discuss this concept with the help of the given examples:
Example 1:
// Go program to illustrate the concept// of splitting a slice of bytespackage main  import (    "bytes"    "fmt")  func main() {      // Creating and initializing    // the slice of bytes    // Using shorthand declaration    slice_1 := []byte{'!', '!', 'G', 'e', 'e', 'k', 's',        'f', 'o', 'r', 'G', 'e', 'e', 'k', 's', '#', '#'}          slice_2 := []byte{'A', 'p', 'p', 'l', 'e'}          slice_3 := []byte{'%', 'g', '%', 'e', '%', 'e',                            '%', 'k', '%', 's', '%'}      // Displaying slices    fmt.Println("Original Slice:")    fmt.Printf("Slice 1: %s", slice_1)    fmt.Printf("\nSlice 2: %s", slice_2)    fmt.Printf("\nSlice 3: %s", slice_3)      // Splitting the slice of bytes    // Using Split function    res1 := bytes.Split(slice_1, []byte("eek"))    res2 := bytes.Split(slice_2, []byte(""))    res3 := bytes.Split(slice_3, []byte("%"))      // Display the results    fmt.Printf("\n\nAfter splitting:")    fmt.Printf("\nSlice 1: %s", res1)    fmt.Printf("\nSlice 2: %s", res2)    fmt.Printf("\nSlice 3: %s", res3)  }
Output:
Original Slice:
Slice 1: !!GeeksforGeeks##
Slice 2: Apple
Slice 3: %g%e%e%k%s%

After splitting:
Slice 1: [!!G sforG s##]
Slice 2: [A p p l e]
Slice 3: [ g e e k s ]

Example 2:
// Go program to illustrate the concept// of splitting a slice of bytespackage main  import (    "bytes"    "fmt")  func main() {      // Creating and Splitting    // the slice of bytes    // Using Split function    res1 := bytes.Split([]byte("****Welcome, to, GeeksforGeeks****"),                                                          []byte(","))          res2 := bytes.Split([]byte("Learning x how x to x trim x a x slice of bytes"),                                                                     []byte("x"))          res3 := bytes.Split([]byte("GeeksforGeeks, Geek"), []byte(""))          res4 := bytes.Split([]byte(""), []byte(","))      // Display the results    fmt.Printf("Final Value:\n")    fmt.Printf("\nSlice 1: %s", res1)    fmt.Printf("\nSlice 2: %s", res2)    fmt.Printf("\nSlice 3: %s", res3)    fmt.Printf("\nSlice 4: %s", res4)}
Output:
Final Value:

Slice 1: [****Welcome  to  GeeksforGeeks****]
Slice 2: [Learning   how   to   trim   a   slice of bytes]
Slice 3: [G e e k s f o r G e e k s ,   G e e k]
Slice 4: []

Golang
Golang-Slices
Go Language
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