From: Dan Doel <djd15@...>
Date: 2003-11-15T11:32:38+09:00
Subject: Re: substring: to the end of the string

Some ways:

class String
    def substring1(n)
        reg = Regexp.compile("(^" + "."*n + ")(.*)\\z")
        reg.match(self)[2]
    end
   
    def substring2(s, e=-1)
        self[s..e]
    end
end

p "12345".substring1 1
p "12345".substring1 2
p "12345".substring2 1
p "12345".substring2 2
p "12345".substring2 1, 3