package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:^(?=(?:.+\R){4,}.+(?:\R^$|\Z)).{4}\K.{2} | \G(?=(?:.+\R){4,}.+(?:\R^$|\Z)).+\K.{2}(?=.{4}$))
| ^(?=(?:.+\R){3}.+(?:\R^$|\Z)).{2} | \G(?=(?:.+\R){3}.+(?:\R^$|\Z)).+\K.{2}(?=$)
| ^(?=(?:.+\R){2}.+(?:\R^$|\Z)).\K.{2} | \G(?=(?:.+\R){2}.+(?:\R^$|\Z)).+\K.{2}(?=.$)
| ^(?=(?:.+\R).+(?:\R^$|\Z)).{2}\K.{2} | \G(?=(?:.+\R).+(?:\R^$|\Z)).+\K.{2}(?=.{2}$)
| ^(?=(?:.+(?:\R^$|\Z))).{3}\K.+(?=.{3}(?:\R^$|\Z))`)
var str = `aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
sdaffdsdfsdsfaadd
afdsafdsfssdsfdfs
afdsfdssdfdssfdsf
asfddsfafsdfdsdsf
asfdsdfafdsafasdf
hellohellohellohellohello
hellohellohellohellohello
hellohellohellohellohello
hellohellohellohellohello
hellohellohellohellohello
hellohellohellohellohello
`
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/