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

tr!

        # String.tr!

(from ruby core)
---
    str.tr!(from_str, to_str)   -> str or nil

---

Translates *str* in place, using the same rules as String#tr. Returns
*str*, or `nil` if no changes were made.



      

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.