From c60e0a2e1ca96645fc7e79bc582c64accb6ff4b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=96=9F=E9=85=8C=20=E9=B5=AC=E5=85=84?= <tgckpg@gmail.com>
Date: Thu, 20 Oct 2016 10:06:40 +0800
Subject: [PATCH] Added random string

---
 object.js | 10 ++++++++--
 random.js | 22 ++++++++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/object.js b/object.js
index ea202f8..ca68d5a 100644
--- a/object.js
+++ b/object.js
@@ -11,7 +11,7 @@ var cloneObj = function( o )
 		return clone;
 	}
 
-	if ( o instanceof Array )
+	else if ( o instanceof Array )
 	{
 		clone = [];
 
@@ -23,7 +23,13 @@ var cloneObj = function( o )
 		return clone;
 	}
 
-	if ( o instanceof Object )
+	else if ( o instanceof RegExp )
+	{
+		clone = new RegExp( o );
+		return clone;
+	}
+
+	else if ( o instanceof Object )
 	{
 		for ( var p in o )
 		{
diff --git a/random.js b/random.js
index 8fdcfc5..9b3b582 100644
--- a/random.js
+++ b/random.js
@@ -1,3 +1,8 @@
+"use strict";
+
+const charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+const charLen = charset.length;
+
 var lut = []; for ( var i=0; i<256; i++ ) { lut[i] = (i<16?'0':'')+(i).toString(16); }
 
 module.exports = {
@@ -12,4 +17,21 @@ module.exports = {
 			lut[d2&0x3f|0x80]+lut[d2>>8&0xff]+'-'+lut[d2>>16&0xff]+lut[d2>>24&0xff]+
 			lut[d3&0xff]+lut[d3>>8&0xff]+lut[d3>>16&0xff]+lut[d3>>24&0xff];
 	}
+	, randstr: function( len )
+	{
+		if( !len ) len = 16;
+
+		var str = "";
+		for( var i = 0; i < len; i ++ )
+		{
+			var d0 = Math.random()*0xffffffff|0;
+
+			str += charset[ ( d0 & 0xff ) % charLen ];
+			if( ++ i < len ) str += charset[ ( d0 >> 8 & 0xff ) % charLen ];
+			if( ++ i < len ) str += charset[ ( d0 >> 16 & 0xff ) % charLen ];
+			if( ++ i < len ) str += charset[ ( d0 >> 24 & 0xff ) % charLen ];
+		}
+
+		return str;
+	}
 };