Data commit

Task/Averages-Simple-moving-average/Ruby/averages-simple-moving-average-1.rb

@@ -0,0 +1,18 @@
+def simple_moving_average(size)
+  nums = []
+  sum = 0.0
+  lambda do |hello|
+    nums << hello
+    goodbye = nums.length > size ? nums.shift : 0
+    sum += hello - goodbye
+    sum / nums.length
+  end
+end
+
+ma3 = simple_moving_average(3)
+ma5 = simple_moving_average(5)
+
+(1.upto(5).to_a + 5.downto(1).to_a).each do |num|
+  printf "Next number = %d, SMA_3 = %.3f, SMA_5 = %.1f\n",
+    num, ma3.call(num), ma5.call(num)
+end

Task/Averages-Simple-moving-average/Ruby/averages-simple-moving-average-2.rb

@@ -0,0 +1,28 @@
+class MovingAverager
+  def initialize(size)
+    @size = size
+    @nums = []
+    @sum = 0.0
+  end
+  def <<(hello)
+    @nums << hello
+    goodbye = @nums.length > @size ? @nums.shift : 0
+    @sum += hello - goodbye
+    self
+  end
+  def average
+    @sum / @nums.length
+  end
+  alias to_f average
+  def to_s
+    average.to_s
+  end
+end
+
+ma3 = MovingAverager.new(3)
+ma5 = MovingAverager.new(5)
+
+(1.upto(5).to_a + 5.downto(1).to_a).each do |num|
+  printf "Next number = %d, SMA_3 = %.3f, SMA_5 = %.1f\n",
+    num, ma3 << num, ma5 <<num
+end