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

~ 

        # Regexp.~

(from ruby core)
---
    ~ rxp   -> integer or nil

---

Match---Matches *rxp* against the contents of `$_`. Equivalent to *`rxp*
=~ $_`.

    $_ = "input data"
    ~ /at/   #=> 7

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.