implement if, then, and else as methods

if.rb

class Object
  def _if(object)
    object.class != FalseClass && !object.nil?
  end
end

class TrueClass
  def then
    yield
    self
  end  

  def else
    self
  end  
end 

class FalseClass
  def then
    self
  end  

  def else
    yield
    self
  end  
end


_if(7 > 5).then do
  puts "Math is right"
end.else do
  puts "Math is wrong"
end


_if(5 > 7).then do
  puts "Math is wrong"
end.else do
  puts "Math is right"
end

_if("truthy").then do
  puts "Strings are truthy"
end.else do
  puts "Strings are falsey"
end

_if(nil).then do
  puts "nil is truthy"
end.else do
  puts "nil is falsey"
end