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

echo= 

        # IO.echo=

(from ruby core)
---
    io.echo = flag

---

Enables/disables echo back. On some platforms, all combinations of this
flags and raw/cooked mode may not be valid.

You must require 'io/console' to use this method.

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.