docs: add some quick examples to the README

README.md

@@ -8,8 +8,43 @@
 [![jsDelivr Hits](https://data.jsdelivr.com/v1/package/npm/async/badge?style=rounded)](https://www.jsdelivr.com/package/npm/async)
 
 
-Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. Although originally designed for use with [Node.js](https://nodejs.org/) and installable via `npm install --save async`, it can also be used directly in the browser.
+Async is a utility module which provides straight-forward, powerful functions for working with [asynchronous JavaScript](http://caolan.github.io/async/global.html). Although originally designed for use with [Node.js](https://nodejs.org/) and installable via `npm install --save async`, it can also be used directly in the browser.
 
 For Documentation, visit <https://caolan.github.io/async/>
 
 *For Async v1.5.x documentation, go [HERE](https://github.com/caolan/async/blob/v1.5.2/README.md)*
+
+
+```javascript
+// for use with Node-style callbacks...
+var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
+var configs = {};
+
+async.forEachOf(obj, (value, key, callback) => {
+    fs.readFile(__dirname + value, "utf8", (err, data) => {
+        if (err) return callback(err);
+        try {
+            configs[key] = JSON.parse(data);
+        } catch (e) {
+            return callback(e);
+        }
+        callback();
+    });
+}, err => {
+    if (err) console.error(err.message);
+    // configs is now a map of JSON data
+    doSomethingWith(configs);
+});
+```
+
+```javascript
+// ...or ES2017 async functions
+async.mapLimit(urls, 5, async function(url) {
+    const response = await fetch(url)
+    return response.body
+}, (err, results) => {
+    if (err) throw err
+    // results is now an array of the response bodies
+    console.log(results)
+})
+```