Add class and object with methods

tshemsedinov · tshemsedinov · commit d26239e4fcb0 · 2018-09-15T23:11:25.000+03:00
diff --git a/JavaScript/2-middle.js b/JavaScript/2-middle.js
@@ -0,0 +1,31 @@
+'use strict';
+
+const adder = initial => ({
+  value: initial,
+  add(value) {
+    this.value += value;
+    return this;
+  }
+});
+
+const Adder = class {
+  constructor(initial) {
+    this.value = initial;
+  }
+  add(value) {
+    this.value += value;
+    return this;
+  }
+};
+
+// Usage
+
+{
+  const v = new Adder(3).add(-9).add(12);
+  console.log(v);
+}
+
+{
+  const v = adder(3).add(-9).add(12);
+  console.log(v);
+}
