Ruby require

ruby_require.rb

## http://ruby-doc.org/core-2.1.2/Kernel.html

# /Users/tmp/a.rb

p 'Hello'

class A
  def hello
    p 'Hello'
  end
end

####

load '/Users/tmp/a' # oadError: cannot load such file -- /Users/tmp/a
load '/Users/tmp/a.rb' 
# "Hello" 
# true

load '/Users/tmp/a.rb' 
# "Hello" 
# true

require '/Users/tmp/a'
# "Hello" 
# true

require '/Users/tmp/a' # false
require '/Users/tmp/a.rb' # false

require_relative 'a.rb' # true

require_relative 'a.rb' # LoadError: cannot infer basepath from irb