golang removes leading and trailing spaces

In golang, removing spaces before and after a string is a very common operation, such as getting a string entered by the user from a form, or reading data from a file. Here, we will introduce how to use the functions provided in the golang language to remove leading and trailing spaces from a string.

Method 1: Use the strings.TrimSpace() function

The golang standard library provides a function called strings.TrimSpace(), which can be used to remove leading and trailing spaces from a string. . The method of using this function is as follows:

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "  hello world  "
    trimmed := strings.TrimSpace(str)
    fmt.Println(trimmed)
}

The output result is:

hello world

Method 2: Using regular expressions

In addition to using functions in the standard library, we can also use Regular expression in golang to remove leading and trailing spaces from a string.

package main

import (
    "fmt"
    "regexp"
)

func main() {
    str := "  hello world  "
    trimmed := regexp.MustCompile(`^s+|s+$`).ReplaceAllString(str, "")
    fmt.Println(trimmed)
}

In the above example, we used the regular expression ^s |s $, which matches one or more space characters and replaces them with null characters string.

Summary:

No matter which method, you can easily remove the spaces before and after the string. But in actual use, we can choose which method to use according to the actual situation. If we only need to remove spaces, we can use the TrimSpace function, and if we need more flexible operations, we can use regular expressions.

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