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Replace() vs ReplaceAll() in Golang
ReplaceAll() function in Golang replaces all the occurrences of a given substring with a new value. In contrast, Replace() function is used to replace only some characters in a string with a new value. It replaces only a specified "n" occurrences of the substring.
Syntax
The syntax of ReplaceAll() is as follows −
func ReplaceAll(s, old, new string) string
Where,
- s is the given string
- old is the string which we want to replace, and
- new is string which will replace the old string.
Example 1
Let us consider the following example −
package main
import (
"fmt"
"strings"
)
func main() {
// Initializing the Strings
r := "You've Got to Learn Golang String Functions."
// Display the Strings
fmt.Println("Given String: \n", r)
// Using the ReplaceAll Function
testresults := strings.Replace(r, "Go", "ReplaceAll" ,2)
// Display the ReplaceAll Output
fmt.Println("\n After Replacing: \n", testresults)
}Output
It will generate the following output −
Given String: You've Got to Learn Golang String Functions. After Replacing: You've ReplaceAllt to Learn ReplaceAlllang String Functions.
Observe that all occurrences of "Go" have been replaced with "ReplaceAll".
Example 2
Now, let's take an example to show the use of Replace() function, which will also highlight the difference between Replace() and ReplaceAll().
package main
import (
"fmt"
"strings"
)
func main() {
// Initializing the Strings
r := "You've Got to Learn Golang String Functions."
// Display the Strings
fmt.Println("Given String: \n", r)
// Using the Replace Function
testresults := strings.Replace(r, "Go", "ReplaceAll", 1)
// Display the ReplaceAll Output
fmt.Println("\n After Replacing: \n", testresults)
}Output
On execution, it will produce the following output −
Given String: You've Got to Learn Golang String Functions. After Replacing: You've ReplaceAllt to Learn Golang String Functions.
Here, you can notice that only one instance of "Go" has been replaced by the new value "ReplaceAll".
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