package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:^.*\r?\n){4}.*\K(,)$`)
var str = `('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),
('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),
('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),
('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),
('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),
('1234', '1234', 1234, '1234'),
('1234', '1234', 12, 'hello'),
('stuff', '1234', 1234, '1234'),`
var substitution = ""
fmt.Println(re.ReplaceAllString(str, substitution))
}
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/