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How to trim white spaces from the slice of bytes in Golang?
  • Last Updated : 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 trim all the leading and trailing white space from the given slice using TrimSpace() function. This function returns a subslice of the original slice by removing off all leading and trailing white space. It is defined under the bytes package so, you have to import bytes package in your program for accessing TrimSpace function.

Syntax:

func TrimSpace(ori_slice []byte) []byte

Here, ori_slice is the original slice of bytes. Let us discuss this concept with the help of the given examples:

Example 1:




// Go program to illustrate the concept of
// trimming white space in the 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', '#', '#'}
      
    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)
  
    // Trimming whitespace from
    // the given slice of bytes
    // Using TrimSpace function
    res1 := bytes.TrimSpace(slice_1)
    res2 := bytes.TrimSpace(slice_2)
    res3 := bytes.TrimSpace(slice_3)
  
    // Display the results
    fmt.Printf("\n\nNew Slice:\n")
    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: %geeks%

New Slice:

Slice 1: !!GeeksforGeeks##
Slice 2: **Apple^^
Slice 3: %geeks%

Example 2:




// Go program to illustrate the concept of
// trimming white space in the slice of bytes
package main
  
import (
    "bytes"
    "fmt"
)
  
func main() {
  
    // Creating and trimming whitespace
    // from the given slice of bytes
    // Using TrimSpace function
    res1 := bytes.TrimSpace([]byte(" ****Welcome to GeeksforGeeks**** "))
    res2 := bytes.TrimSpace([]byte(" !!!!Learning how to trim a slice of bytes@@@@ "))
    res3 := bytes.TrimSpace([]byte(" Geek, GeeksforGeeks "))
  
    // Display the results
    fmt.Printf("\n\nFinal Slice:\n")
    fmt.Printf("\nSlice 1: %s", res1)
    fmt.Printf("\nSlice 2: %s", res2)
    fmt.Printf("\nSlice 3: %s", res3)
}

Output:

Final Slice:

Slice 1: ****Welcome to GeeksforGeeks****
Slice 2: !!!!Learning how to trim a slice of bytes@@@@
Slice 3: Geek, GeeksforGeeks

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