How to trim/strip white spaces from a String in Golang Examples

In this blog post, You will learn three programs using the Strings package’s built-in functions.

• Delete all whitespaces from a string
• Delete leading and trailing spaces of a string
• Remove duplicate spaces/tabs/newlines from a given string

How to trim whitespaces from a string in Golang

This program is to remove all white or empty spaces from a given string and returns the new string.

The standard inbuilt Strings package provides various utility string functions. Replace is one of the functions, to replace empty spaces from a given string and return a new string.

Following is a syntax for Replace function in Golang

func Replace(s, old, new string, n int) string  

return a copy of the given string by replacing an empty string.

Here is an example of removing empty spaces from a string using the Strings replace function.

package main

import (
    "fmt"
    "strings"
)

func main() {
    str: = "  This is a test example "
    fmt.Println("Original String: ", str)
    fmt.Println("Output String: ", strings.Replace(str, " ", "", -1))
}

When the above example code is compiled and executed, Output is as follows

Original String:    This is a test example  
Output String:  Thisistestexample  

How to strip leading and trailing spaces from a string in Golang?

This program is to remove the Start and end spaces from a given string and returns the new string.

Standard inbuilt Strings package provides various utility string functions. TrimSpace is one of the functions that replace leading and trailing empty spaces from a given string and returns the new string.

Following is a syntax for Replace function

func TrimSpace(s string) string  

return a slice of a given string with all start and ending spaces removed.

Here is an Example of removing leading and trailing empty spaces from a string using the Strings TrimSpace function

package main

import (
    "fmt"
    "strings"
)

func main() {
    str: = "  This is a test example  "
    fmt.Println("Original String: ", str)
    fmt.Println("Output String: ", strings.TrimSpace(str))
}

When the above example code is compiled and executed, the Output is as follows

Original String:    This is a test example  
Output String:  This is a test example  

How to remove duplicate empty spaces from a string in Golang?

This program removes duplicate spaces( more than one space) from a given string and returns a string with a single space.

This checks spaces for Tab, and newline characters.

In the below program,

• Created a regular expression pattern using the regex package with the MustCompile function.

• The pattern is \\s+, \\s represents single character matches with a tab or newline, and `+ checks for one or more characters.

• Finally call ReplaceAllString, which returns a new string with removed duplicate space characters.

  Following is an example of removing duplicate space substrings from a given string ReplaceAllString

package main

import (
    "fmt"
    "regexp"
)

func main() {
    str: = "  This is a test             example  "
    singleSpacePattern: = regexp.MustCompile(`\s+`)

        fmt.Println("Original String: ", str)
    fmt.Println("Output String: ", singleSpacePattern.ReplaceAllString(str, " "))
}

Output is

Original String:    This is a test             example  
Output String:   This is a test example  

Conclusion

In this post, You learned to remove spaces for a given string in multiple ways.