do_not_reverse_lookup=

        # BasicSocket.do_not_reverse_lookup=

(from ruby core)
---
    BasicSocket.do_not_reverse_lookup = bool

---

Sets the global do_not_reverse_lookup flag.

The flag is used for initial value of do_not_reverse_lookup for each
socket.

    s1 = TCPSocket.new("localhost", 80)
    p s1.do_not_reverse_lookup                 #=> true
    BasicSocket.do_not_reverse_lookup = false
    s2 = TCPSocket.new("localhost", 80)
    p s2.do_not_reverse_lookup                 #=> false
    p s1.do_not_reverse_lookup                 #=> true


(from ruby core)
---
    basicsocket.do_not_reverse_lookup = bool

---

Sets the do_not_reverse_lookup flag of *basicsocket*.

    TCPSocket.open("www.ruby-lang.org", 80) {|sock|
      p sock.do_not_reverse_lookup       #=> true
      p sock.peeraddr                    #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"]
      sock.do_not_reverse_lookup = false
      p sock.peeraddr                    #=> ["AF_INET", 80, "carbon.ruby-lang.org", "54.163.249.195"]
    }