package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`\d{4}(?! {2,})`)
var str = `1234 5678 9101 1234
2999 5178 9101 2234
9999 5628 9201 1232
8888 3678 9101 1232`
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/