package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)(?:(?<=\().+?(?=\))|(?<=\[).+?(?=\]))`)
var str = `this is a [sample] string
with [so.me] special ((words)). and he(r)e's [[another! one]] within double brack[ets.
let's finish] this.
#ver 1 - \[(.*?)\] - catch brackets, stop if nl between brackets
#ver 2 - \[(.*?]*)\] - same
#ver 3 - \[([^]]+)\] - same, but catch even if nl between brackets
#ver 4 - \[([^\[\]]*)\] - same
#ver 5 - (?<=\[).+?(?=\]) - catch inside the brackets, stops at nl
#ver 6 - (\[(?:\[??[^\[]*?\])) - same as #3
#ver 7 - (?<=\[).*?(?=\]) - same as # 5
#ver 8 - ([[][a-z \s]+[]]) - catch only the first, w/ brackets
#ver 9 - (?:(?<=\().+?(?=\))|(?<=\[).+?(?=\])) - same as #5 but catch () as well`
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/