Add nodemon

chapter03/package.json

@@ -5,6 +5,11 @@
     "main": "index.js",
     "scripts": {
         "build": "flow-remove-types src/ -d out/",
+        "buildWithMaps":
+            "flow-remove-types src/ -d out/ --pretty --sourcemaps",
+        "start": "npm run build && node out/doroundmath.js",
+        "nodemon":
+            "./node_modules/nodemon/bin/nodemon.js --watch src --delay 1 --exec npm start",
         "addTypes": "flow-typed install",
         "update": "npm install && flow-typed install",
         "flow": "flow",
@@ -62,6 +67,7 @@
         "flow-coverage-report": "^0.5.0",
         "flow-remove-types": "^1.2.3",
         "flow-typed": "^2.4.0",
+        "nodemon": "^1.17.3",
         "prettier": "^1.11.1"
     }
 }

chapter03/src/doroundmath.js

@@ -8,4 +8,4 @@ console.log(RM.addR(12.348, 4.221)); // 16.57
 console.log(multR(22.9, 12.4)); // 283.96
 console.log(divR(22, 7)); // 3.14
 
-console.log(RM.changeSign(0.07)); // error; RM.changeSign is not a function
+//   console.log(RM.changeSign(0.07)); // error; RM.changeSign is not a function

chapter03/src/flowcomments.js

@@ -0,0 +1,51 @@
+/* @flow */
+/* eslint-disable no-unused-vars */
+
+"use strict";
+
+let someFlag /*: boolean */;   
+let greatTotal /*: number */;  
+let firstName /*: string */;
+
+function toString(x /*: number */) /*: string */ {
+    return String(x);
+}
+
+let traffic /*: "red" | "amber" | "green" */;
+
+/*::
+type pair<T> = [T, T];
+
+type pairOfNumbers = pair<number>;
+type pairOfStrings = pair<string>;
+
+type simpleFlag = number | boolean;
+type complexObject = {
+    id: string,
+    name: string,
+    indicator: simpleFlag,
+    listOfValues: Array<number>
+};
+*/
+
+class Person {
+    /*::
+    first: string;
+    last: string;
+    */
+
+    constructor(first /*: string */, last /*: string */) {
+        this.first = first;
+        this.last = last;
+    }
+
+    // ...several methods, snipped out
+}
+
+/*::
+import type { dniType, nameType } from "./opaque_types";
+*/
+
+/*::
+export type { pairOfNumbers, pairOfStrings };
+*/