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

lines 

        # String.lines

(from ruby core)
---
    str.lines(separator=$/, chomp: false)  -> an_array

---

Returns an array of lines in *str* split using the supplied record
separator (`$/` by default).  This is a shorthand for
`str.each_line(separator, getline_args).to_a`.

If `chomp` is `true`, `separator` will be removed from the end of each
line.

    "hello\nworld\n".lines              #=> ["hello\n", "world\n"]
    "hello  world".lines(' ')           #=> ["hello ", " ", "world"]
    "hello\nworld\n".lines(chomp: true) #=> ["hello", "world"]

If a block is given, which is a deprecated form, works the same as
`each_line`.

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.