This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

isatty 

        # IO.isatty

(from ruby core)
---
    ios.isatty   -> true or false
    ios.tty?     -> true or false

---

Returns `true` if *ios* is associated with a terminal device (tty),
`false` otherwise.

    File.new("testfile").isatty   #=> false
    File.new("/dev/tty").isatty   #=> true

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.