Symbol#to_proc's hot cousin. Simple and elegant alternative to using &:method with enumerables.

compare:

  enum = [1.4, 2.4 ,3.4]
  enum.map {|i| i.floor } #=> [1, 2, 3]
  enum.map(&:floor)       #=> [1, 2, 3]
  enum.every.floor        #=> [1, 2, 3]

arguments? sure:

  %w( axb dxf ).every.gsub(/x/,'y')     #=> ['ayb', 'dyf']
  %w( axb dxf ).every.gsub(/x/) { 'y' } #=> ['ayb', 'dyf']