Golang | Splitting a slice of bytes after the specified separator

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 slice after the specified separator using a SplitN() function. This function splits a slice into all subslices after each instance of the given separator and returns a slice of the subslices between those separators. If the given separator is empty, then it splits after each UTF-8 sequence and the count indicates the number of subslices to return. It is defined under the bytes package so, you have to import bytes package in your program for accessing SplitN function.

Syntax:

func SplitN(o_slice, sep []byte, m int) [][]byte

Here, o_slice is the original string, sep is the separator, and m is used to find the number of substrings to return. Here, if m>0, then it returns at most m subslices and the last string subslice will not split. If m == 0, then it will return nil. If m<0, then it will return all subslices.



Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Go program to illustrate the concept
// of splitting a slice of bytes
package 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', 'G', 'e',
                                 'e', 'k', 's', '#', '#'}
  
    slice_2 := []byte{'A', 'p', 'p', '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 SplitN function
    res1 := bytes.SplitN(slice_1, []byte("eek"), 2)
    res2 := bytes.SplitN(slice_2, []byte(""), 3)
    res3 := bytes.SplitN(slice_3, []byte("%"), 0)
  
    // Display the results
    fmt.Printf("\n\nAfter splitting:\n")
    fmt.Printf("\nSlice 1: %s", res1)
    fmt.Printf("\nSlice 2: %s", res2)
    fmt.Printf("\nSlice 3: %s", res3)
  
}

chevron_right


Output:

Original Slice:
Slice 1: !!GeeksforGeeksGeeks##
Slice 2: Apppple
Slice 3: %g%e%e%k%s%

After splitting:

Slice 1: [!!G sforGeeksGeeks##]
Slice 2: [A p ppple]
Slice 3: []

Example 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Go program to illustrate the concept
// of splitting a slice of bytes
package main
  
import (
    "bytes"
    "fmt"
)
  
func main() {
  
    // Creating and Splitting
    // the slice of bytes
    // Using SplitN function
    res1 := bytes.SplitN([]byte("****Welcome, to, GeeksforGeeks****"),
        []byte(","), -1)
  
    res2 := bytes.SplitN([]byte("Learning x how x to x"+
           " trim x a x slice of bytes"),[]byte("x"), 3)
  
    res3 := bytes.SplitN([]byte("Geeks,for,Geeks, Geek"), []byte(","), 0)
  
    res4 := bytes.SplitN([]byte(""), []byte(","), 2)
  
    // Display the results
    fmt.Printf("\nFinal Result after splitting:\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)
}

chevron_right


Output:

Final Result after splitting:

Slice 1: [****Welcome  to  GeeksforGeeks****]
Slice 2: [Learning   how   to x trim x a x slice of bytes]
Slice 3: []
Slice 4: []


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.