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

tr_s 

        # String.tr_s

(from ruby core)
---
    str.tr_s(from_str, to_str)   -> new_str

---

Processes a copy of *str* as described under String#tr, then removes
duplicate characters in regions that were affected by the translation.

    "hello".tr_s('l', 'r')     #=> "hero"
    "hello".tr_s('el', '*')    #=> "h*o"
    "hello".tr_s('el', 'hx')   #=> "hhxo"

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.