Upgrade usage examples

tshemsedinov · tshemsedinov · commit 963534075e4f · 2017-11-18T20:14:20.000+02:00
diff --git a/JavaScript/1-simple.js b/JavaScript/1-simple.js
@@ -6,4 +6,15 @@ function Singleton() {
   Singleton.instance = this;
 }
 
+// Usage
+
 console.assert(new Singleton() === new Singleton());
+console.log('instances are equal');
+
+// But instance is accessible
+
+const a1 = new Singleton();
+Singleton.instance = null;
+console.log('Remove instance');
+const a2 = new Singleton();
+if (a1 !== a2) console.log('a1 !== a2');
diff --git a/JavaScript/2-safe.js b/JavaScript/2-safe.js
@@ -5,4 +5,7 @@ const Singleton = new (function() {
   return function() { return single; };
 })();
 
+// Usage
+
 console.assert(new Singleton() === new Singleton());
+console.log('instances are equal');
diff --git a/JavaScript/3-complex.js b/JavaScript/3-complex.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const Singleton = (function() {
+const Singleton = (() => {
   let instance;
 
   function Singleton() {
@@ -13,4 +13,7 @@ const Singleton = (function() {
   return Singleton;
 })();
 
+// Usage
+
 console.assert(new Singleton() === new Singleton());
+console.log('instances are equal');
