Data commit

Task/Cumulative-standard-deviation/Haxe/cumulative-standard-deviation.haxe

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+using Lambda;
+
+class Main {
+	static function main():Void {
+		var nums = [2, 4, 4, 4, 5, 5, 7, 9];
+		for (i in 1...nums.length+1)			
+			Sys.println(sdev(nums.slice(0, i)));
+	}
+	
+	static function average<T:Float>(nums:Array<T>):Float {
+		return nums.fold(function(n, t) return n + t, 0) / nums.length;
+	}
+
+	static function sdev<T:Float>(nums:Array<T>):Float {
+		var store = [];
+		var avg = average(nums);
+		for (n in nums) {
+			store.push((n - avg) * (n - avg));
+		}
+		
+		return Math.sqrt(average(store));
+	}
+}