package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(^|\s)#[a-zA-Z0-9][\w-]*\b`)
var str = `#Beginning of string matches,
#Word matches.
#word_1 and #word-1 matches.
They match even if they are followed by a non-word like #word" or #word" or #word.
#_words beggining width underscore or with #-hypen don't match.
Brok#en words don't match either.
Should we match these cases? -#word "#word ,#word
Hash from urls do not match: http://site/#hash
Neither ?#hash nor -#hash
`
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/