Golang : Validate email address with regular expression
This short tutorial is add on to my previous tutorial on how to validate email address with Golang. This time, the validation is done with regular expression instead of invoking external function.
There are couple of regular expressions that can be used to validate an email address. For this tutorial, we will use this
^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,4}$
regular expression to validate the email address.
package main
import (
"fmt"
"regexp"
)
func validateEmail(email string) bool {
Re := regexp.MustCompile(`^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,4}$`)
return Re.MatchString(email)
}
func main() {
email := "abc@abc12"
if !validateEmail(email) {
fmt.Println("Email address is invalid")
} else {
fmt.Println("Email address is VALID")
}
email = "abc@abc123.com"
if !validateEmail(email) {
fmt.Println("Email address is invalid")
} else {
fmt.Println("Email address is VALID")
}
}
Sample output :
Email address is invalid
Email address is VALID
Note :
Some people, when confronted with a problem, think, “I know, I’ll use regular expressions.” Now they have two problems. — Jamie Zawinksi
Reference :
https://groups.google.com/forum/#!topic/golang-nuts/UAq5fio6xBQ
See also : Golang : Validate email address
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+15.6k Golang : Get own process identifier
+4.1k Golang : Display packages names during compilation
+18.9k Golang : Count number of digits from given integer value
+16.8k Golang : Display list of time zones with GMT
+35k Golang : Display float in 2 decimal points and rounding up or down
+16.3k Golang : [json: cannot unmarshal object into Go value of type]
+19.7k Curl usage examples with Golang
+5.2k Golang : Build new URL for named or registered route with Gorilla webtoolkit example
+6.3k Golang : Process json data with Jason package
+13.5k Golang : Find commonalities in two slices or arrays example
+9.4k Golang : Flip coin example
+9.7k Golang : Sieve of Eratosthenes algorithm