Improve examples

tshemsedinov · tshemsedinov · commit 80392bd54c22 · 2018-09-16T23:04:35.000+03:00
diff --git a/JavaScript/2-middle.js b/JavaScript/2-middle.js
@@ -1,18 +1,22 @@
 'use strict';
 
-const adder = initial => ({
+const adder = (initial = 0) => ({
   value: initial,
+  steps: [initial],
   add(value) {
+    this.steps.push(value);
     this.value += value;
     return this;
   }
 });
 
 const Adder = class {
-  constructor(initial) {
+  constructor(initial = 0) {
+    this.steps = [initial];
     this.value = initial;
   }
   add(value) {
+    this.steps.push(value);
     this.value += value;
     return this;
   }
@@ -21,11 +25,15 @@ const Adder = class {
 // Usage
 
 {
-  const v = new Adder(3).add(-9).add(12);
-  console.log(v);
+  const { value, steps } = new Adder(5).add(-8).add(11);
+  console.log(value);
+  const [a, b, c] = steps;
+  console.log(a, b, c);
 }
 
 {
-  const v = adder(3).add(-9).add(12);
-  console.log(v);
+  const { value, steps } = adder(5).add(-8).add(11);
+  console.log(value);
+  const [a, b, c] = steps;
+  console.log(a, b, c);
 }
diff --git a/JavaScript/3-extended.js b/JavaScript/3-extended.js
@@ -26,3 +26,5 @@ const PointEx = serializable(movable(Point));
 const point1 = new PointEx(10, 20);
 point1.move(5, -2);
 console.log(point1.toString());
+const { x, y } = point1;
+console.log(x, y);
