point-free block passing in ruby

point_free_blocks.rb

"abcd".method(:length).to_proc.call
# => 4 

# ---

def a(x,y)
  [x, y]
end

def b
  yield(1, 2)
end

# explicit points:
b { |x, y| a(x, y) }
# => [1, 2]

b { |*args| a(*args) }
# => [1, 2]

# point-free:
b(&method(:a))
# => [1, 2]