`yield_self` in Ruby 2.5

This is its definition. Slightly simplified

# object.yield_self {|x| block } → an_object
# Yields self to the block and returns the result of the block.

class Object
  def yield_self
    yield(self)
  end
end


# [...]

"data.csv"
  .yield_self { |name| File.expand_path(name, __dir__) }
  .yield_self { |path| File.read(path) }
  .yield_self { |body| CSV.parse(body) }
  .map        { |row|  row[1].to_i }
  .sum

Source: yield_self in Ruby 2.5 // Michał Łomnicki

The resulting code reminds me a tiny bit of |> in Elixir:

Enum.take_while(1..limit, fn (n) -> fib(n) < limit end)
  |> Enum.map(&fib/1)
  |> Enum.filter(&even/1)
  |> Enum.sum