Examples of using blocks to achieve Inversion of Control in Ruby

IoC.rb

puts "hello"

# refactor to a method call
def hello
  puts "hello"
end

hello

#refactor to invert control
def hello
  yield
end

hello do
  puts "hello"
end

#refactor to invert control
def hello
  yield "hello"
end

hello do |phrase|
  puts phrase
end

#refactor to invert control
def hello
  puts yield
end

hello do
  "hello"
end