added docs

modules-examples/hockey.js

@@ -0,0 +1,38 @@
+export class HockeyGame{
+    constructor(){
+        this.home = 0
+        this.away = 0
+    }
+
+    /**
+     * Call this method when home team scores.  It will
+     * increase home team score by 1 point.
+     */
+    homeTeamScores(){
+        this.home += 1;
+    }
+
+    /**
+     * Call this method when away team scores.  It will
+     * increase home team score by 1 point.
+     */
+    awayTeamScores(){
+        this.away += 1;
+    }
+
+    /**
+     * Returns winner of the game.
+     * 
+     * @returns {string} the name of the winner team.  Either "home", "away" or "tie"
+     */
+    winner(){
+        if(this.home > this.away){
+            return "home"
+        }
+        if(this.away > this.home){
+            return "away"
+        }
+        return "tie"
+    }
+
+}

modules-examples/stats.js

@@ -1,5 +1,15 @@
 
+/**
+ * In statistics, infinity is set to 30.
+ */
 export const INFINITY = 30;
+
+/**
+ * Computes the average of the list.  If the list is empty, the
+ * function returns NaN
+ * @param {number[]} lst 
+ * @returns the average of the list.
+ */
 export function average(lst){
     if(lst.length < 1){
         return NaN;
@@ -14,6 +24,12 @@ export function average(lst){
 }
 
 
+/**
+ * Computes the standard deviation of the list.  If the list is empty, the
+ * function returns NaN
+ * @param {number[]} lst 
+ * @returns the standard deviation of the list.
+ */
 export function std(lst){
     if(lst.length < 1){
         return NaN;