Data commit

Task/Averages-Simple-moving-average/Go/averages-simple-moving-average.go

@@ -0,0 +1,31 @@
+package main
+
+import "fmt"
+
+func sma(period int) func(float64) float64 {
+    var i int
+    var sum float64
+    var storage = make([]float64, 0, period)
+
+    return func(input float64) (avrg float64) {
+        if len(storage) < period {
+            sum += input
+            storage = append(storage, input)
+        }
+
+	sum += input - storage[i]
+        storage[i], i = input, (i+1)%period
+	avrg = sum / float64(len(storage))
+
+	return
+    }
+}
+
+func main() {
+    sma3 := sma(3)
+    sma5 := sma(5)
+    fmt.Println("x       sma3   sma5")
+    for _, x := range []float64{1, 2, 3, 4, 5, 5, 4, 3, 2, 1} {
+        fmt.Printf("%5.3f  %5.3f  %5.3f\n", x, sma3(x), sma5(x))
+    }
+}