Class: Pong::Series

Inherits:
Array
  • Object
show all
Defined in:
lib/pong.rb

Constant Summary collapse

MAX = 
32767

Instance Method Summary collapse

Instance Method Details

#last(n = MAX) ⇒ Object 



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# File 'lib/pong.rb', line 15

def last(n = MAX)
  num = num(n)
  self.slice(-num, num)
end

#mean(n = MAX) ⇒ Object 



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# File 'lib/pong.rb', line 26

def mean(n = MAX)
  size == 0 ? 0 : sum(n) / num(n)
end

#nil_percent(n = MAX) ⇒ Object 



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# File 'lib/pong.rb', line 34

def nil_percent(n = MAX)
  (nils(n).to_f / num(n).to_f) * 100.0
end

#nils(n = MAX) ⇒ Object 



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# File 'lib/pong.rb', line 30

def nils(n = MAX)
  last(n).select{|value| value.nil? }.size
end

#num(n) ⇒ Object 



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# File 'lib/pong.rb', line 10

def num(n)
  n = MAX if n.nil?
  [n, size].min
end

#sum(n = MAX) ⇒ Object 



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# File 'lib/pong.rb', line 20

def sum(n = MAX)
  last(n).inject(0){|memo, value|
    value.nil? ? memo : (memo + value)
  }
end