Ruby for entertainment #1

rfe-1.1.rb.txt

[1] pry(main)> HELLO!!!
             | def answer
             |   :HI!
             | end  
NoMethodError: undefined method `HELLO!' for main:Object
from (pry):4:in `__pry__'
[2] pry(main)> answer
=> :"HI!"

rfe-1.2.rb.txt

[2] pry(main)> HELLO!!!
             | [1, 2, 3].map { |n|
             |   HI!!!  
             |   n + 100  
             | }  
NoMethodError: undefined method `+' for true:TrueClass
from (pry):9:in `block in __pry__'

rfe-1.3.rb.txt

[3] pry(main)> HELLO!!!
             | [1, 2, 3].map { |n|
             |   HI!!!
             |   n += 100
             | }  
NoMethodError: undefined method `HI!' for main:Object
from (pry):14:in `block in __pry__'

rfe1.4.rb.txt

[1] pry(main)> CLASSY!!!
             | class A
             |   AWESOME!!!
             |   class B
             |     MARVELOUS!!!
             |     def great
             |       'awful :-('
             |     end  
             |   end  
             | end  
NoMethodError: undefined method `MARVELOUS!' for A::B:Class
from (pry):7:in `<class:B>'
[2] pry(main)> A
=> A
[3] pry(main)> A::B
=> A::B
[4] pry(main)> A::B.new.great
=> "awful :-("