Please write the tutorial at https://w3clan.com - It's easy to communicate and ask there for any help too.

I'm writing test cases and trying to validate email:
[email protected]
using the regexp from the cookbook

regexp.Compile(`(\w[-._\w]*\w@\w[-._\w]*\w\.\w{2,3})`)

false is expected for there are 6 characters after . at the end.
but the result is true
I fix it using:

regexp.Compile(`\w[-._\w]*\w@\w[-._\w]*\w\.\w{2,3}$`)

Do I misuse or misunderstand anything?

If I have a massive regex, how do I split it over multiple lines without affecting the matching logic?

In the First part of the tutorial (the first example in Literal Special Characters subsection), "Working on drive C:\\" does not Match C:\\\\ but Match "C:\\\\", Why ?

I think that the regexp should be quoted by " instead of ``

ps: I'm using go 1.2

Seems Golang doesn't support positive lookbehind assertion, below code output "No matched!":

   package main
    import (
        "fmt"
        "regexp"
    )
    func main() {
        s := "abcdef"

        if matched, str := regexp.MatchString(`(?<=abc)def`, s); matched {
            fmt.Println("It's matched ", str)
        } else {
            fmt.Println("Nothing matched!")
        }
    }