Fix wrong readme example and add runkit example file

README.md

@@ -55,9 +55,9 @@ var saveCycles = debounce(expensiveOperation, 100, {leading: true});
 })
 
 //=> call no #1
-//=> call no #1
-//=> call no #1
-//=> call no #1
+//=> call no #4
+//=> call no #4
+//=> call no #4
 ```
 
 ### With accumulate=true

example.js

@@ -0,0 +1,42 @@
+const debounce = require('debounce-promise')
+
+function expensiveOperation (value, delay) {
+  return Promise.resolve(value)
+}
+
+// Simple example
+{
+  const saveCycles = debounce(expensiveOperation, 100);
+
+  [1, 2, 3, 4].forEach(num => {
+    return saveCycles('call no #' + num).then(value => {
+      console.log(value)
+    })
+  })
+}
+
+// With leading=true
+{
+  const saveCycles = debounce(expensiveOperation, 100, {leading: true});
+
+  [1, 2, 3, 4].forEach(num => {
+    return saveCycles('call no #' + num).then(value => {
+      console.log(value)
+    })
+  })
+}
+
+// With accumulate=true
+{
+  function squareValues (values) {
+    return Promise.all(values.map(val => val * val))
+  }
+
+  const square = debounce(squareValues, 100, {accumulate: true});
+
+  [1, 2, 3, 4].forEach(num => {
+    return square(num).then(value => {
+      console.log(value)
+    })
+  })
+}

package.json

@@ -3,6 +3,7 @@
   "version": "3.0.0",
   "description": "Create a debounced version of a promise returning function",
   "main": "dist/index",
+  "runkitExampleFilename": "./example.js",
   "scripts": {
     "test": "tap --node-arg -r --node-arg babel-register --node-arg -r --node-arg babel-polyfill test && npm run lint",
     "lint": "standard | snazzy",