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']