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nahurst/occurrence_count.rb

Created February 3, 2012 21:52
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Order by occurrence count and list count of an array
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occurrence_count.rb
days = ["Friday", "Saturday", "Sunday", "Monday", "Friday", "Saturday", "Friday"]
days.inject({}) {|h,day| h[day] = h.include?(day) ? h[day]+1 : 1; h }.sort_by{|k,v|v}.reverse.each{|k,v| puts [k,v].join(",")}
#Friday,3
#Saturday,2
#Sunday,1
#Monday,1
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