Data commit

Task/Averages-Simple-moving-average/Crystal/averages-simple-moving-average.crystal

@@ -0,0 +1,15 @@
+def sma(n) Proc(Float64, Float64)
+	a = Array(Float64).new
+	->(x : Float64) {
+		a.shift if a.size == n
+		a.push x
+		a.sum / a.size.to_f
+	}
+end
+
+sma3, sma5 = sma(3), sma(5)
+
+# Copied from the Ruby solution.
+(1.upto(5).to_a + 5.downto(1).to_a).each do |n|
+	printf "%d: sma3 = %.3f - sma5 = %.3f\n", n, sma3.call(n.to_f), sma5.call(n.to_f)
+end