How to replace string in go language

In the Go language, you can use the Replace() function of the strings package to replace a string. The syntax is "strings.Replace(original string, value to be searched, replacement value, number of replacements)"; if you replace If the number of times is negative, it means that all specified substrings in the string will be replaced with new values.

The operating environment of this tutorial: Windows 7 system, GO version 1.18, Dell G3 computer.

During the development process, sometimes we need to replace a specific string in a string with a new string. In the Go language, it is necessary to replace a certain string with a new string. Requirements, we can achieve it through the strings.Replace() function.

strings.Replace() function

Syntax

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

Parameters	Description
s	The entire string to be replaced.
old	The string to be replaced. What string should
new	be replaced with.
n	The number of times to be replaced, -1, then all old in the string s will be replaced with new.

Return value

• Returns the replaced string.

Explanation

• Replace the old string in string s with the new string, replace n times, Returns the replaced string. If n is -1, then all old in string s will be replaced with new.

Usage example:

##Replace the string once

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 strings.Replace() 函数，替换字符串
	strHaiCoder := "hello你好hello"
	fmt.Println("StrReplace =", strings.Replace(strHaiCoder, "hello", "hi", 1))
}

Replace string multiple times

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 strings.Replace() 函数，替换字符串
	strHaiCoder := "hello你好hello"
	fmt.Println("StrReplace =", strings.Replace(strHaiCoder, "hello", "hi", 2))
}

Replace all strings

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 strings.Replace() 函数，替换字符串
	strHaiCoder := "hello你好hello你好hello你好hello你好hello"
	fmt.Println("StrReplace =", strings.Replace(strHaiCoder, "hello", "hi", -1))
}

【Related recommendations:

Go video tutorial, Programming teaching】

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