package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?mi)^[a-z][a-z\d]*(?:_[a-z\d]+)*$`)
var str = `_
A
abcd
a_2_c_3
aB_C
1abc
ab__c
a_b_
Humpty Dumpty
`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/