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

- 

        # Float.-

(from ruby core)
---
    self - other -> numeric

---

Returns a new Float which is the difference of `self` and `other`:

    f = 3.14
    f - 1                 # => 2.14
    f - 1.0               # => 2.14
    f - Rational(1, 1)    # => 2.14
    f - Complex(1, 0)     # => (2.14+0i)

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.