Projectionist

Implicit writer invocation in block assignment

class Foo
  attr_writer :bar
end

f = Foo.new

%w(one two three).each do |f.bar| 
  p f
end
#<Foo:0x4369c @bar="one">
#<Foo:0x4369c @bar="two">
#<Foo:0x4369c @bar="three">