Add optional suffix parameter

Readme.md

@@ -1,15 +1,17 @@
 ![uniqid logo](http://i.imgur.com/OrZC1lc.png)
 
-![unqiid npm badge](http://img.shields.io/npm/v/uniqid.svg) ![uniqid npm downloads badge](https://img.shields.io/npm/dm/uniqid.svg) 
+![unqiid npm badge](http://img.shields.io/npm/v/uniqid.svg) ![uniqid npm downloads badge](https://img.shields.io/npm/dm/uniqid.svg)
+
+### A Unique Hexatridecimal ID generator.
 
-### A Unique Hexatridecimal ID generator. 
 It will always create unique id's based on the current time, process and machine name.
 
 ```
 npm install uniqid
 ```
 
 ## Usage
+
 ```js
 var uniqid = require('uniqid');
 
@@ -18,50 +20,63 @@ console.log(uniqid(), uniqid()); // -> 4n5pxq24kriob12ogd, 4n5pxq24ksiob12ogl
 ```
 
 ## Features
+
 - Very fast
 - Generates unique id's on multiple processes and machines even if called at the same time.
 - Shorter 8 and 12 byte versions with less uniqueness.
 
-
 # How it works
+
 - With the current time the ID's are always unique in a single process.
 - With the Process ID the ID's are unique even if called at the same time from multiple processes.
 - With the MAC Address the ID's are unique even if called at the same time from multiple machines and processes.
 
 ## API:
-#### **uniqid(** prefix *optional string* **)** 
-Generate 18 byte unique id's based on the time, process id and mac address. Works on multiple processes and machines. 
 
-```js
+#### **uniqid(** prefix _optional string_ , suffix _optional string_ **)**
+
+Generate 18 byte unique id's based on the time, process id and mac address. Works on multiple processes and machines.
+
+```js "zu4850jkyfoxok"
 uniqid() -> "4n5pxq24kpiob12og9"
 uniqid('hello-') -> "hello-4n5pxq24kpiob12og9"
+uniqid('hello-', '-goodbye') -> "hello-4n5pxq24kpiob12og9-goodbye"
+
+// usage with suffix only
+uniqid('', '-goodbye') -> "4n5pxq24kpiob12og9-goodbye"
+uniqid(undefined, '-goodbye') -> "4n5pxq24kpiob12og9-goodbye"
 ```
 
-#### **uniqid.process(** prefix *optional string* **)** 
+#### **uniqid.process(** prefix _optional string_ , suffix _optional string_ **)**
+
 Generate 12 byte unique id's based on the time and the process id. Works on multiple processes within a single machine but not on multiple machines.
+
 ```js
 uniqid.process() -> "24ieiob0te82"
 ```
 
-#### **uniqid.time(** prefix *optional string* **)** 
+#### **uniqid.time(** prefix _optional string_ , suffix _optional string_ **)**
+
 Generate 8 byte unique id's based on the current time only. Recommended only on a single process on a single machine.
 
 ```js
 uniqid.time() -> "iob0ucoj"
 ```
 
 ## Webpack and Browserify
+
 Since browsers don't provide a Process ID and in most cases neither give a Mac Address using uniqid from Webpack and Browserify falls back to `uniqid.time()` for all the other methods too. The browser is the single process, single machine case anyway.
 
 ## Debug
+
 Debug messages are turned of by default as of `v4.1.0`. To turn on debug messages you'll need to set `uniqid_debug` to `true` before you require the module.
 
 ```js
 // enable debug messages
-module.uniqid_debug = true
+module.uniqid_debug = true;
 
 // require the module
-var uniqid = require('uniqid')
+var uniqid = require('uniqid');
 ```
 
 ## **License**

examples/browserify/bundle.js

@@ -278,9 +278,9 @@ if(typeof __webpack_require__ !== 'function'){
 
 // Exports
 // ================================================
-module.exports = module.exports.default = function(prefix){ return (prefix || '') + address + pid + now().toString(36); }
-module.exports.process = function(prefix){ return (prefix || '') + pid + now().toString(36); }
-module.exports.time = function(prefix){ return (prefix || '') + now().toString(36); }
+module.exports = module.exports.default = function(prefix = '', suffix = ''){ return prefix + address + pid + now().toString(36) + suffix; }
+module.exports.process = function(prefix = '', suffix = ''){ return prefix + pid + now().toString(36) + suffix; }
+module.exports.time = function(prefix = '', suffix = ''){ return prefix + now().toString(36) + suffix; }
 
 // Helpers
 // ================================================

examples/simple/index.js

@@ -1,2 +1,6 @@
 var uniqid = require('../../');
-console.log(uniqid(), uniqid());
+console.log(uniqid(), uniqid());
+console.log(uniqid('prefix-'));
+console.log(uniqid('prefix-', '-suffix'));
+console.log(uniqid('', '-suffix'));
+console.log(uniqid(undefined, '-suffix'));

index.js

@@ -29,9 +29,9 @@ if(typeof __webpack_require__ !== 'function'){
 
 // Exports
 // ================================================
-module.exports = module.exports.default = function(prefix){ return (prefix || '') + address + pid + now().toString(36); }
-module.exports.process = function(prefix){ return (prefix || '') + pid + now().toString(36); }
-module.exports.time = function(prefix){ return (prefix || '') + now().toString(36); }
+module.exports = module.exports.default = function(prefix = '', suffix = ''){ return prefix + address + pid + now().toString(36) + suffix; }
+module.exports.process = function(prefix = '', suffix = ''){ return prefix + pid + now().toString(36) + suffix; }
+module.exports.time = function(prefix = '', suffix = ''){ return prefix + now().toString(36) + suffix; }
 
 // Helpers
 // ================================================