Add more examples

Author: Flare

README.md

@@ -34,7 +34,60 @@ setTimeout(function(){
 }, 1000)
 ```
 
-## Example(More Complex)
+## Example: Multi Worker
+
+```js
+'use strict'
+const WaitQueue = require('wait-queue')
+const wq = new WaitQueue
+
+// worker loop
+function run_worker(id, time){
+    var loop = function(){
+        // get item at the front of the queue
+        wq.shift()
+        .then((item)=>{
+            console.log('worker-' + id)
+            console.log('  queue-len', wq.queue.length, 'item', item)
+            setTimeout(loop, time)
+        })
+    }
+    loop()
+}
+
+// worker-a use 1s every task
+run_worker('a', 1000)
+// worker-b use 2s every task
+run_worker('b', 2000)
+// worker-c use 5s every task
+run_worker('c', 5000)
+
+// add a task every 500ms
+for(var n=0; n<20; n++){
+    wq.push(n)
+}
+```
+
+## Example: Push a function
+
+```js
+'use strict'
+const WaitQueue = require('wait-queue')
+const wq = new WaitQueue
+
+// there's no task here 
+wq.shift()
+.then((item)=>{
+    item.call()
+})
+
+// add a function as item
+wq.push(function(){
+    console.log('a function')
+})
+```
+
+## Example: Loop Tasks
 
 ```js
 'use strict'

index.js

@@ -28,8 +28,8 @@ class WaitQueue extends EventEmitter{
 		}else{
 			if(this.queue.length > 0 && this.listeners.length > 0){
 				let listener = this.listeners.shift()
-				// delay listener
 				listener.call(this)
+				// delay next loop
 				setImmediate(this._flush.bind(this))
 			}
 		}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "wait-queue",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "A javascript wait queue object handle infinity loop tasks more efficiently (using ES6 class and promise)",
   "main": "index.js",
   "directories": {

tests/test_callback.js

@@ -0,0 +1,14 @@
+'use strict'
+const WaitQueue = require('../index')
+const wq = new WaitQueue
+
+// there's no task here 
+wq.shift()
+.then((item)=>{
+    item.call()
+})
+
+// add a function as item
+wq.push(function(){
+    console.log('a function')
+})

tests/test_multiworker.js

@@ -0,0 +1,29 @@
+'use strict'
+const WaitQueue = require('../index')
+const wq = new WaitQueue
+
+// worker loop
+function run_worker(id, time){
+    var loop = function(){
+        // get item at the front of the queue
+        wq.shift()
+        .then((item)=>{
+            console.log('worker-' + id)
+            console.log('  queue-len', wq.queue.length, 'item', item)
+            setTimeout(loop, time)
+        })
+    }
+    loop()
+}
+
+// worker-a use 1s every task
+run_worker('a', 1000)
+// worker-b use 2s every task
+run_worker('b', 2000)
+// worker-c use 5s every task
+run_worker('c', 5000)
+
+// add a task every 500ms
+for(var n=0; n<20; n++){
+    wq.push(n)
+}