Initial data commit

Task/Averages-Simple-moving-average/JavaScript/averages-simple-moving-average-1.js

@@ -0,0 +1,24 @@
+function simple_moving_averager(period) {
+    var nums = [];
+    return function(num) {
+        nums.push(num);
+        if (nums.length > period)
+            nums.splice(0,1);  // remove the first element of the array
+        var sum = 0;
+        for (var i in nums)
+            sum += nums[i];
+        var n = period;
+        if (nums.length < period)
+            n = nums.length;
+        return(sum/n);
+    }
+}
+
+var sma3 = simple_moving_averager(3);
+var sma5 = simple_moving_averager(5);
+var data = [1,2,3,4,5,5,4,3,2,1];
+for (var i in data) {
+    var n = data[i];
+    // using WSH
+    WScript.Echo("Next number = " + n + ", SMA_3 = " + sma3(n) + ", SMA_5 = " + sma5(n));
+}

Task/Averages-Simple-moving-average/JavaScript/averages-simple-moving-average-2.js

@@ -0,0 +1,19 @@
+// single-sided
+Array.prototype.simpleSMA=function(N) {
+return this.map(
+  function(el,index, _arr) {
+      return _arr.filter(
+      function(x2,i2) {
+        return i2 <= index && i2 > index - N;
+        })
+      .reduce(
+      function(current, last, index, arr){
+        return (current + last);
+        })/index || 1;
+      });
+};
+
+g=[0,1,2,3,4,5,6,7,8,9,10];
+console.log(g.simpleSMA(3));
+console.log(g.simpleSMA(5));
+console.log(g.simpleSMA(g.length));