Class: MetricFu::Ranking

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/base/ranking.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Ranking

Returns a new instance of Ranking.



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# File 'lib/base/ranking.rb', line 6

def initialize
  @items_to_score = {}
end

Instance Method Details

#percentile(item) ⇒ Object 



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# File 'lib/base/ranking.rb', line 18

def percentile(item)
  index = sorted_items.index(item)
  worse_item_count = (length - (index+1))
  worse_item_count.to_f/length
end

#top(num = nil) ⇒ Object 



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# File 'lib/base/ranking.rb', line 10

def top(num=nil)
  if(num.is_a?(Numeric))
    sorted_items[0,num]
  else
    sorted_items
  end
end