ruby - Create Ranges from Array of Dates -

how can following code takes array of dates , returns array of ranges dates:

def get_ranges(dates)   sets = []   current_set = []   dates.each |date|     if current_set.empty?       current_set << date     else       if current_set.last == date - 1.day         current_set << date       else         sets << current_set         current_set = [date]       end     end      sets << current_set if date == dates.last   end    sets.collect { |set| set.first..set.last } end 

running following:

dates = [date.new(2014, 6, 27), date.new(2014, 6, 28), date.new(2014, 6, 29), date.new(2014, 7, 1), date.new(2014, 7, 3), date.new(2014, 7, 4), date.new(2014, 7, 17)]   puts get_ranges(dates) 

produces following result:

=> [fri, 27 jun 2014..sun, 29 jun 2014, tue, 01 jul 2014..tue, 01 jul 2014, thu, 03 jul 2014..fri, 04 jul 2014, thu, 17 jul 2014..thu, 17 jul 2014] 

would appreciate help.

update

basically, result should array of consecutive date ranges.

your result looks little odd; there ranges start , end itself. if trying produce array of ranges in each range starts element @ index , ends element @ index + 1, that:

 dates.each_cons(2).map { |dates| (dates[0]..dates[1]) }