Add fibonacci example

examples/fibonacci/index.js

@@ -0,0 +1,32 @@
+'use strict'
+
+const {whilst} = require('async')
+const minDelay = require('min-delay')(500)
+
+function fibonacci (num) {
+  if (num <= 1) return 1
+  return fibonacci(num - 1) + fibonacci(num - 2)
+}
+
+module.exports = function (opts, done) {
+  const {worker} = opts
+  const condition = () => true
+
+  function log () {
+    const args = [`#${worker}`].concat(...arguments)
+    console.log(...args)
+  }
+
+  whilst(
+    condition,
+    function (next) {
+      const fn = () => {
+        const result = fibonacci(worker)
+        log(`fibonacci result is ${result}`)
+        next()
+      }
+      minDelay(fn)
+    },
+    process.exit
+  )
+}

package.json

@@ -37,8 +37,10 @@
     "worker-farm": "~1.3.1"
   },
   "devDependencies": {
+    "async": "~2.1.5",
     "coveralls": "latest",
     "git-dirty": "latest",
+    "min-delay": "~1.0.1",
     "mocha": "latest",
     "nyc": "latest",
     "should": "latest",