How to get capturing group functionality in Go regular expressions

Question

I\'m porting a library from Ruby to Go, and have just discovered that regular expressions in Ruby are not compatible with Go (google RE2). It\'s come to my attention that Ru

Answer 1

Simple way to determine group names based on @VasileM answer.

Disclaimer: it's not about memory/cpu/time optimization

package main

import (
    "fmt"
    "regexp"
)

func main() {
    r := regexp.MustCompile(`^(?P\d{4})-(?P\d{2})-(?P\d{2})$`)

    res := r.FindStringSubmatch(`2015-05-27`)
    names := r.SubexpNames()
    for i, _ := range res {
        if i != 0 {
            fmt.Println(names[i], res[i])
        }
    }
}

https://play.golang.org/p/Y9cIVhMa2pU