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

children 

        # Pathname.children

(from ruby core)
---
    children(with_directory=true)

---

Returns the children of the directory (files and subdirectories, not
recursive) as an array of Pathname objects.

By default, the returned pathnames will have enough information to
access the files. If you set `with_directory` to `false`, then the
returned pathnames will contain the filename only.

For example:
    pn = Pathname("/usr/lib/ruby/1.8")
    pn.children
        # -> [ Pathname:/usr/lib/ruby/1.8/English.rb,
               Pathname:/usr/lib/ruby/1.8/Env.rb,
               Pathname:/usr/lib/ruby/1.8/abbrev.rb, ... ]
    pn.children(false)
        # -> [ Pathname:English.rb, Pathname:Env.rb, Pathname:abbrev.rb, ... ]

Note that the results never contain the entries `.` and `..` in the
directory because they are not children.

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.