diff --git a/.istanbul.yml b/.istanbul.yml
new file mode 100644
index 0000000..7fd8cec
--- /dev/null
+++ b/.istanbul.yml
@@ -0,0 +1,2 @@
+instrumentation:
+    excludes: ['**/spec/**']
\ No newline at end of file
diff --git a/build/js/enumerable.js b/build/js/enumerable.js
index 894d5ac..b302ede 100644
--- a/build/js/enumerable.js
+++ b/build/js/enumerable.js
@@ -77,13 +77,6 @@ return /******/ (function(modules) { // webpackBootstrap
 /* 0 */
 /***/ (function(module, exports, __webpack_require__) {
 
-Array.prototype.asEnumerable = function()
-{
-    var e = new Enumerable(this);
-
-    return e;
-};
-
 function Enumerable(_array)
 {
     if(_array)
@@ -98,6 +91,18 @@ function Enumerable(_array)
 
 Enumerable.fn = Enumerable.prototype;
 
+Enumerable.Range = function(start, count)
+{
+    var result = [];
+
+    for(var i = 0; i < count; i++)
+    {
+        result[i]  = start + i;
+    }
+
+    return result.asEnumerable();
+};
+
 module.exports = Enumerable;
 
 __webpack_require__(1);
@@ -128,6 +133,10 @@ __webpack_require__(19);
 __webpack_require__(20);
 __webpack_require__(21);
 __webpack_require__(22);
+__webpack_require__(23);
+__webpack_require__(24);
+__webpack_require__(25);
+__webpack_require__(26);
 
 /***/ }),
 /* 2 */
@@ -173,7 +182,11 @@ Object.prototype.getType = function()
     else 	if(typeString === '[object Object]')
     {
       return 'object';
-    }    
+    } 
+    else if (typeof this === "function")
+    {
+      return 'function';
+    }   
     
     return typeString;
 };
@@ -197,7 +210,16 @@ var Enumerable = __webpack_require__(0);
 
 Enumerable.fn.any = function(fn)
 {
-    var hasFn = (fn !== null && fn !== undefined && typeof fn === 'function');
+    var hasFn = (fn !== null && fn !== undefined);
+    var FnIsFunction = (hasFn && typeof fn === "function");
+
+    if(!hasFn)
+    {
+        if(this !== null && this !== undefined && this.collection.length > 0)
+        {
+            return true;
+        }
+    }
 
     for(var i = 0; i < this.collection.length; i++)
     {
@@ -208,17 +230,11 @@ Enumerable.fn.any = function(fn)
             continue;
         }
 
-        if(hasFn && fn(i, item, this.collection))
+        if(hasFn && FnIsFunction && fn(i, item, this.collection))
         {
             return true;
         }
-        else if(hasFn)
-        {
-            if(this !== null && this !== undefined && this.collection.length > 0)
-            {
-                return true;
-            }
-        }
+        
     }
 
     return false;
@@ -309,6 +325,52 @@ Enumerable.fn.firstOrDefault = function(fn)
 
 var Enumerable = __webpack_require__(0);
 
+Enumerable.fn.dropFirst = function(count)
+{
+    if(count <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    if(this.collection.length > count)
+    {
+        return new Enumerable(this.collection.splice(this.collection.length - count, count));
+    }
+    else
+    {
+        return new Enumerable();
+    }
+};
+
+/***/ }),
+/* 10 */
+/***/ (function(module, exports, __webpack_require__) {
+
+var Enumerable = __webpack_require__(0);
+
+Enumerable.fn.dropLast = function(count)
+{
+    if(count <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    if(this.collection.length > count)
+    {
+        return new Enumerable(this.collection.splice(0, this.collection.length - count));
+    }
+    else
+    {
+        return new Enumerable();
+    }
+};
+
+/***/ }),
+/* 11 */
+/***/ (function(module, exports, __webpack_require__) {
+
+var Enumerable = __webpack_require__(0);
+
 Enumerable.fn.last = function()
 {
     if(this.collection.length > 0)
@@ -322,7 +384,7 @@ Enumerable.fn.last = function()
 };
 
 /***/ }),
-/* 10 */
+/* 12 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -353,7 +415,85 @@ Enumerable.fn.lastOrDefault = function(fn)
 };
 
 /***/ }),
-/* 11 */
+/* 13 */
+/***/ (function(module, exports, __webpack_require__) {
+
+var Enumerable = __webpack_require__(0);
+
+Enumerable.fn.shuffle = function()
+{
+    var currentIndex = this.collection.length;
+    var temporaryValue;
+    var randomIndex;
+
+    while (0 !== currentIndex) 
+    {
+      randomIndex = Math.floor(Math.random() * currentIndex);
+      currentIndex -= 1;
+    
+      temporaryValue = this.collection[currentIndex];
+      this.collection[currentIndex] = this.collection[randomIndex];
+      this.collection[randomIndex] = temporaryValue;
+    }
+    
+    return new Enumerable(this.collection);
+};
+
+/***/ }),
+/* 14 */
+/***/ (function(module, exports, __webpack_require__) {
+
+var Enumerable = __webpack_require__(0);
+
+Enumerable.fn.except = function(arr, fn)
+{
+    if(this.collection.length <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    var result = [];
+
+    for(var i = 0; i < this.collection.length; i++)
+    {
+        var item = this.collection[i];
+        
+        var contains = false;
+
+        for(var x = 0; x < arr.length; x++)
+        {
+            var item2 = arr[x];
+
+            if(fn && fn.getType() === "function")
+            {
+                if(fn(item, item2) === true)
+                {
+                    contains = true;
+                    break;
+                }
+            }
+            else
+            {
+                if(item2 === item)
+                {
+                    contains = true;
+                    break;
+                }
+            }
+        }
+
+        if(contains === false)
+        {
+            result.push(item);
+        }
+    }
+
+    return result.asEnumerable();
+};
+
+
+/***/ }),
+/* 15 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -364,7 +504,7 @@ Enumerable.fn.maximum = function()
 
     function isNumeric(x)
     {
-        return (x.getType() === 'number') && (x % 1 === 0);
+        return (x !== null && x.getType() === 'number') && (x % 1 === 0);
     }
 
     var temp = [];
@@ -386,7 +526,7 @@ Enumerable.fn.maximum = function()
 };
 
 /***/ }),
-/* 12 */
+/* 16 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -397,7 +537,7 @@ Enumerable.fn.minimum = function()
 
     function isNumeric(x)
     {
-        return (x.getType() === 'number') && (x % 1 === 0);
+        return (x !== null && x.getType() === 'number') && (x % 1 === 0);
     }
 
     var temp = [];
@@ -414,12 +554,12 @@ Enumerable.fn.minimum = function()
     {
         result = Math.min.apply(null, temp);
     }
-    
+
     return result;
 };
 
 /***/ }),
-/* 13 */
+/* 17 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -546,7 +686,7 @@ Enumerable.fn.orderBy = function(property, fn)
 };
 
 /***/ }),
-/* 14 */
+/* 18 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -673,7 +813,7 @@ Enumerable.fn.orderByDescending = function(property, fn)
 };
 
 /***/ }),
-/* 15 */
+/* 19 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -682,14 +822,23 @@ Enumerable.fn.select = function(obj)
 {
     var results = [];
 
-    for(var i = 0; i < this.collection.length; i++)
+    function explicit(item, obj)
     {
-        var item = this.collection[i];
-
-        if(obj !== null && obj !== undefined && obj.length > 0)
+        var _temp = {};
+        
+        if(obj.length == 1)
+        {
+            for(var p in item)
+            {
+                if(p === obj[0])
+                {
+                    _temp = item[p];
+                    break;
+                }
+            }
+        }
+        else
         {
-            var _temp = {};
-            
             for(var x = 0; x < obj.length; x++)
             {
                 var prop = obj[x];
@@ -702,8 +851,30 @@ Enumerable.fn.select = function(obj)
                     }
                 }
             }
-            
-            results.push(_temp);
+        }
+        
+        results.push(_temp);
+    }
+
+    function funcEval(obj, i, item, col)
+    {
+        results.push(obj(i, item, col));
+    }
+
+    for(var i = 0; i < this.collection.length; i++)
+    {
+        var item = this.collection[i];
+
+        if(obj !== null && obj !== undefined && obj.length > 0)
+        {
+            if(obj.getType() == 'function')
+            {
+                funcEval(obj, i, item, this.collection);
+            }
+            else
+            {
+                explicit(item, obj);
+            }
         }
         else
         {
@@ -715,7 +886,7 @@ Enumerable.fn.select = function(obj)
 };
 
 /***/ }),
-/* 16 */
+/* 20 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -738,7 +909,7 @@ Enumerable.fn.single = function()
 };
 
 /***/ }),
-/* 17 */
+/* 21 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -774,7 +945,7 @@ Enumerable.fn.singleOrDefault = function(fn)
 
 
 /***/ }),
-/* 18 */
+/* 22 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -783,21 +954,33 @@ Enumerable.fn.skip = function(count)
 {
     var results = [];
 
-    var canSkip = ((count > 0) && (count < this.collection.length));
+    var hasItems = (count > 0);
+    var validSkipCount = (count < this.collection.length);
+
+    var canSkip = (hasItems && validSkipCount);
 
     if(canSkip)
     {
-        for(var i = (count - 1); i < count; i++)
+        for(var i = 0; i < this.collection.length; i++)
         {
+            if(i < count)
+            {
+                continue;
+            }
+            
             results.push(this.collection[i]);
         }
     }
+    else
+    {
+        return this;
+    }
 
     return results.asEnumerable();
 };
 
 /***/ }),
-/* 19 */
+/* 23 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -808,17 +991,29 @@ Enumerable.fn.skipWhile = function(fn)
     var hasFn = (fn !== null && fn !== undefined);
     var FnIsFunction = (hasFn && typeof fn === "function");
     var canSkip = (hasFn && FnIsFunction);
+    var hasItems = this.collection.length > 0;
 
-    if(canSkip)
+    if(!hasFn || !FnIsFunction)
     {
+        return this;
+    }
+
+    if(canSkip && hasItems)
+    {
+        var end = this.collection.length;
+        
         for(var i = 0; i < this.collection.length; i++)
         {
             var item = this.collection[i];
             var _callbackResult = fn(i, item, this.collection);
 
-            if(_callbackResult !== true)
+            if(_callbackResult === true)
+            {
+                continue;
+            }
+            else
             {
-                results.push(this.collection[i]);
+                return this.collection.slice(i, end).asEnumerable();
             }
         }
     }
@@ -827,7 +1022,7 @@ Enumerable.fn.skipWhile = function(fn)
 };
 
 /***/ }),
-/* 20 */
+/* 24 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -857,7 +1052,7 @@ Enumerable.fn.take = function(count)
 };
 
 /***/ }),
-/* 21 */
+/* 25 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
@@ -866,19 +1061,26 @@ Enumerable.fn.takeWhile = function(fn)
 {
     var results = [];
 
+    var hasFn = (fn !== null && fn !== undefined && typeof fn === 'function');
+
+    if(!hasFn)
+    {
+        return this;
+    }
+
     for(var i = 0; i < this.collection.length; i++)
     {
         var item = this.collection[i];
 
         var _callbackResult = fn(i, item, this.collection);
 
-        if(_callbackResult !== true)
+        if(_callbackResult === true)
         {
-            return results.asEnumerable();
+            results.push(item);
         }
         else
         {
-            results.push(this.collection[i]);
+            break;
         }
     }
 
@@ -886,7 +1088,7 @@ Enumerable.fn.takeWhile = function(fn)
 };
 
 /***/ }),
-/* 22 */
+/* 26 */
 /***/ (function(module, exports, __webpack_require__) {
 
 var Enumerable = __webpack_require__(0);
diff --git a/build/js/enumerable.min.js b/build/js/enumerable.min.js
index 950e57c..22ef4a3 100644
--- a/build/js/enumerable.min.js
+++ b/build/js/enumerable.min.js
@@ -1 +1 @@
-!function(t,n){"object"==typeof exports&&"object"==typeof module?module.exports=n():"function"==typeof define&&define.amd?define([],n):"object"==typeof exports?exports.Enumerable=n():t.Enumerable=n()}("undefined"!=typeof self?self:this,function(){return function(t){function n(o){if(e[o])return e[o].exports;var i=e[o]={i:o,l:!1,exports:{}};return t[o].call(i.exports,i,i.exports,n),i.l=!0,i.exports}var e={};return n.m=t,n.c=e,n.d=function(t,e,o){n.o(t,e)||Object.defineProperty(t,e,{configurable:!1,enumerable:!0,get:o})},n.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(e,"a",e),e},n.o=function(t,n){return Object.prototype.hasOwnProperty.call(t,n)},n.p="",n(n.s=0)}([function(t,n,e){function o(t){this.collection=t||[]}Array.prototype.asEnumerable=function(){return new o(this)},o.fn=o.prototype,t.exports=o,e(1)},function(t,n,e){e(2),e(3),e(4),e(5),e(6),e(7),e(8),e(9),e(10),e(11),e(12),e(13),e(14),e(15),e(16),e(17),e(18),e(19),e(20),e(21),e(22)},function(t,n,e){var o=e(0);Array.prototype.asEnumerable=function(){return new o(this)}},function(t,n){Object.prototype.getType=function(){var t=Object.prototype.toString.call(this);return"[object Date]"===t?"date":"[object String]"===t?"string":"[object Number]"===t?"number":"[object Boolean]"===t?"boolean":"[object Array]"===t?"array":"[object Object]"===t?"object":t}},function(t,n,e){e(0).fn.toArray=function(){return this.collection}},function(t,n,e){e(0).fn.any=function(t){for(var n=null!==t&&void 0!==t&&"function"==typeof t,e=0;e<this.collection.length;e++){var o=this.collection[e];if(null!==o&&void 0!==o){if(n&&t(e,o,this.collection))return!0;if(n&&null!==this&&void 0!==this&&this.collection.length>0)return!0}}return!1}},function(t,n,e){e(0).fn.count=function(t){if(null!==t&&void 0!==t&&"function"==typeof t){for(var n=[],e=0;e<this.collection.length;e++){var o=this.collection[e];t(e,o,this.collection)&&n.push(o)}return n.length}return this.collection.length}},function(t,n,e){e(0).fn.first=function(){if(this.collection.length>0)return this.collection[0];throw"sequence contains no elements"}},function(t,n,e){e(0).fn.firstOrDefault=function(t){return this.collection.length>0?this.collection[0]:null!==t&&void 0!==t?"function"==typeof t?t():t:null}},function(t,n,e){e(0).fn.last=function(){if(this.collection.length>0)return this.collection[this.collection.length-1];throw"sequence contains no elements"}},function(t,n,e){e(0).fn.lastOrDefault=function(t){var n=null!==t&&void 0!==t,e=n&&"function"==typeof t;return this.collection.length>0?this.collection[this.collection.length-1]:n?e?t():t:null}},function(t,n,e){e(0).fn.maximum=function(){function t(t){return"number"===t.getType()&&t%1==0}for(var n=null,e=[],o=0;o<this.collection.length;o++)t(this.collection[o])&&e.push(this.collection[o]);return e.length>0&&(n=Math.max.apply(null,e)),n}},function(t,n,e){e(0).fn.minimum=function(){function t(t){return"number"===t.getType()&&t%1==0}for(var n=null,e=[],o=0;o<this.collection.length;o++)t(this.collection[o])&&e.push(this.collection[o]);return e.length>0&&(n=Math.min.apply(null,e)),n}},function(t,n,e){var o=e(0);o.fn.orderBy=function(t,n){if(!this.collection)return null;if("[object Array]"!=Object.prototype.toString.call(this.collection))return null;if(0===this.collection.length)return new o([]);var e=n&&"function"==typeof n,i=!!t,l=[],r=this.collection,c=i?r[0][t].getType():r[0].getType();if(e){r=[];for(var u=0;u<this.collection.length;u++){var f=n(this.collection[u]);f&&r.push(f)}}return"string"==c?l=r.sort(function(n,e){var o=i?n[t].toUpperCase():n.toUpperCase(),l=i?e[t].toUpperCase():e.toUpperCase();return o<l?-1:o>l?1:0}):"number"==c?l=r.sort(function(n,e){return i?n[t]-e[t]:n-e}):"date"==c?l=r.sort(function(n,e){return i?new Date(n[t])-new Date(e[t]):new Date(n)-new Date(e)}):"boolean"==c?l=r.sort(function(t,n){return t===n?0:t?1:-1}):"array"==c?l=this.collection:"object"==c&&(l=this.collection),l.asEnumerable()}},function(t,n,e){var o=e(0);o.fn.orderByDescending=function(t,n){if(!this.collection)return null;if("[object Array]"!=Object.prototype.toString.call(this.collection))return null;if(0===this.collection.length)return new o([]);var e=n&&"function"==typeof n,i=!!t,l=[],r=this.collection,c=i?r[0][t].getType():r[0].getType();if(e){r=[];for(var u=0;u<this.collection.length;u++){var f=n(this.collection[u]);f&&r.push(f)}}return"string"==c?l=r.sort(function(n,e){var o=i?n[t].toUpperCase():n.toUpperCase(),l=i?e[t].toUpperCase():e.toUpperCase();return o<l?1:o>l?-1:0}):"number"==c?l=r.sort(function(n,e){return i?e[t]-n[t]:e-n}):"date"==c?l=r.sort(function(n,e){return i?new Date(e[t])-new Date(n[t]):new Date(e)-new Date(n)}):"boolean"==c?l=r.sort(function(t,n){return t===n?0:t?-1:1}):"array"==c?l=this.collection:"object"==c&&(l=this.collection),l.asEnumerable()}},function(t,n,e){e(0).fn.select=function(t){for(var n=[],e=0;e<this.collection.length;e++){var o=this.collection[e];if(null!==t&&void 0!==t&&t.length>0){for(var i={},l=0;l<t.length;l++){var r=t[l];for(var c in o)c===r&&(i[r]=o[c])}n.push(i)}else n.push(o)}return n.asEnumerable()}},function(t,n,e){e(0).fn.single=function(){if(1==this.collection.length)return this.collection[0];throw this.collection.length<1?"sequence contains no elements":"collection contains more than one item"}},function(t,n,e){e(0).fn.singleOrDefault=function(t){var n=null!==t&&void 0!==t,e=n&&"function"==typeof t;if(1==this.collection.length)return this.collection[0];if(this.length>1)throw"collection contains more than one item";return n?e?t():t:null}},function(t,n,e){e(0).fn.skip=function(t){var n=[];if(t>0&&t<this.collection.length)for(var e=t-1;e<t;e++)n.push(this.collection[e]);return n.asEnumerable()}},function(t,n,e){e(0).fn.skipWhile=function(t){var n=[],e=null!==t&&void 0!==t;if(e&&(e&&"function"==typeof t))for(var o=0;o<this.collection.length;o++){!0!==t(o,this.collection[o],this.collection)&&n.push(this.collection[o])}return n.asEnumerable()}},function(t,n,e){e(0).fn.take=function(t){if(0==this.collection.length)return this;if(this.collection.length>t){for(var n=[],e=0;e<t;e++)n.push(this.collection[e]);return n.asEnumerable()}return this}},function(t,n,e){e(0).fn.takeWhile=function(t){for(var n=[],e=0;e<this.collection.length;e++){if(!0!==t(e,this.collection[e],this.collection))return n.asEnumerable();n.push(this.collection[e])}return n.asEnumerable()}},function(t,n,e){e(0).fn.where=function(t){for(var n=[],e=null!==t&&void 0!==t,o=e&&"function"==typeof t,i=0;i<this.collection.length;i++){var l=this.collection[i];e&&o&&t(i,l,this.collection)&&n.push(l)}return n.asEnumerable()}}])});
\ No newline at end of file
+!function(t,n){"object"==typeof exports&&"object"==typeof module?module.exports=n():"function"==typeof define&&define.amd?define([],n):"object"==typeof exports?exports.Enumerable=n():t.Enumerable=n()}("undefined"!=typeof self?self:this,function(){return function(e){var o={};function i(t){if(o[t])return o[t].exports;var n=o[t]={i:t,l:!1,exports:{}};return e[t].call(n.exports,n,n.exports,i),n.l=!0,n.exports}return i.m=e,i.c=o,i.d=function(t,n,e){i.o(t,n)||Object.defineProperty(t,n,{configurable:!1,enumerable:!0,get:e})},i.n=function(t){var n=t&&t.__esModule?function(){return t.default}:function(){return t};return i.d(n,"a",n),n},i.o=function(t,n){return Object.prototype.hasOwnProperty.call(t,n)},i.p="",i(i.s=0)}([function(t,n,e){function o(t){this.collection=t||[]}o.fn=o.prototype,o.Range=function(t,n){for(var e=[],o=0;o<n;o++)e[o]=t+o;return e.asEnumerable()},t.exports=o,e(1)},function(t,n,e){e(2),e(3),e(4),e(5),e(6),e(7),e(8),e(9),e(10),e(11),e(12),e(13),e(14),e(15),e(16),e(17),e(18),e(19),e(20),e(21),e(22),e(23),e(24),e(25),e(26)},function(t,n,e){var o=e(0);Array.prototype.asEnumerable=function(){return new o(this)}},function(t,n){Object.prototype.getType=function(){var t=Object.prototype.toString.call(this);return"[object Date]"===t?"date":"[object String]"===t?"string":"[object Number]"===t?"number":"[object Boolean]"===t?"boolean":"[object Array]"===t?"array":"[object Object]"===t?"object":"function"==typeof this?"function":t}},function(t,n,e){e(0).fn.toArray=function(){return this.collection}},function(t,n,e){e(0).fn.any=function(t){var n=null!=t,e=n&&"function"==typeof t;if(!n&&null!=this&&0<this.collection.length)return!0;for(var o=0;o<this.collection.length;o++){var i=this.collection[o];if(null!=i&&(n&&e&&t(o,i,this.collection)))return!0}return!1}},function(t,n,e){e(0).fn.count=function(t){if(null!=t&&"function"==typeof t){for(var n=[],e=0;e<this.collection.length;e++){var o=this.collection[e];t(e,o,this.collection)&&n.push(o)}return n.length}return this.collection.length}},function(t,n,e){e(0).fn.first=function(){if(0<this.collection.length)return this.collection[0];throw"sequence contains no elements"}},function(t,n,e){e(0).fn.firstOrDefault=function(t){return 0<this.collection.length?this.collection[0]:null!=t?"function"==typeof t?t():t:null}},function(t,n,e){var o=e(0);o.fn.dropFirst=function(t){return t<=0?new o(this.collection):this.collection.length>t?new o(this.collection.splice(this.collection.length-t,t)):new o}},function(t,n,e){var o=e(0);o.fn.dropLast=function(t){return t<=0?new o(this.collection):this.collection.length>t?new o(this.collection.splice(0,this.collection.length-t)):new o}},function(t,n,e){e(0).fn.last=function(){if(0<this.collection.length)return this.collection[this.collection.length-1];throw"sequence contains no elements"}},function(t,n,e){e(0).fn.lastOrDefault=function(t){var n=null!=t,e=n&&"function"==typeof t;return 0<this.collection.length?this.collection[this.collection.length-1]:n?e?t():t:null}},function(t,n,e){var o=e(0);o.fn.shuffle=function(){for(var t,n,e=this.collection.length;0!==e;)n=Math.floor(Math.random()*e),e-=1,t=this.collection[e],this.collection[e]=this.collection[n],this.collection[n]=t;return new o(this.collection)}},function(t,n,e){var u=e(0);u.fn.except=function(t,n){if(this.collection.length<=0)return new u(this.collection);for(var e=[],o=0;o<this.collection.length;o++){for(var i=this.collection[o],l=!1,c=0;c<t.length;c++){var r=t[c];if(n&&"function"===n.getType()){if(!0===n(i,r)){l=!0;break}}else if(r===i){l=!0;break}}!1===l&&e.push(i)}return e.asEnumerable()}},function(t,n,e){e(0).fn.maximum=function(){var t=null;for(var n,e=[],o=0;o<this.collection.length;o++)null!==(n=this.collection[o])&&"number"===n.getType()&&n%1==0&&e.push(this.collection[o]);return 0<e.length&&(t=Math.max.apply(null,e)),t}},function(t,n,e){e(0).fn.minimum=function(){var t=null;for(var n,e=[],o=0;o<this.collection.length;o++)null!==(n=this.collection[o])&&"number"===n.getType()&&n%1==0&&e.push(this.collection[o]);return 0<e.length&&(t=Math.min.apply(null,e)),t}},function(t,n,e){var f=e(0);f.fn.orderBy=function(i,t){if(!this.collection)return null;if("[object Array]"!=Object.prototype.toString.call(this.collection))return null;if(0===this.collection.length)return new f([]);var n=t&&"function"==typeof t,l=!!i,e=[],o=this.collection,c=l?o[0][i].getType():o[0].getType();if(n){o=[];for(var r=0;r<this.collection.length;r++){var u=t(this.collection[r]);u&&o.push(u)}}return"string"==c?e=o.sort(function(t,n){var e=l?t[i].toUpperCase():t.toUpperCase(),o=l?n[i].toUpperCase():n.toUpperCase();return e<o?-1:o<e?1:0}):"number"==c?e=o.sort(function(t,n){return l?t[i]-n[i]:t-n}):"date"==c?e=o.sort(function(t,n){return l?new Date(t[i])-new Date(n[i]):new Date(t)-new Date(n)}):"boolean"==c?e=o.sort(function(t,n){return t===n?0:t?1:-1}):"array"==c?e=this.collection:"object"==c&&(e=this.collection),e.asEnumerable()}},function(t,n,e){var f=e(0);f.fn.orderByDescending=function(i,t){if(!this.collection)return null;if("[object Array]"!=Object.prototype.toString.call(this.collection))return null;if(0===this.collection.length)return new f([]);var n=t&&"function"==typeof t,l=!!i,e=[],o=this.collection,c=l?o[0][i].getType():o[0].getType();if(n){o=[];for(var r=0;r<this.collection.length;r++){var u=t(this.collection[r]);u&&o.push(u)}}return"string"==c?e=o.sort(function(t,n){var e=l?t[i].toUpperCase():t.toUpperCase(),o=l?n[i].toUpperCase():n.toUpperCase();return e<o?1:o<e?-1:0}):"number"==c?e=o.sort(function(t,n){return l?n[i]-t[i]:n-t}):"date"==c?e=o.sort(function(t,n){return l?new Date(n[i])-new Date(t[i]):new Date(n)-new Date(t)}):"boolean"==c?e=o.sort(function(t,n){return t===n?0:t?-1:1}):"array"==c?e=this.collection:"object"==c&&(e=this.collection),e.asEnumerable()}},function(t,n,e){e(0).fn.select=function(t){var n,e,o,i,c=[];function l(t,n){var e={};if(1==n.length){for(var o in t)if(o===n[0]){e=t[o];break}}else for(var i=0;i<n.length;i++){var l=n[i];for(var o in t)o===l&&(e[l]=t[o])}c.push(e)}for(var r=0;r<this.collection.length;r++){var u=this.collection[r];null!=t&&0<t.length?"function"==t.getType()?(n=t,e=r,o=u,i=this.collection,c.push(n(e,o,i))):l(u,t):c.push(u)}return c.asEnumerable()}},function(t,n,e){e(0).fn.single=function(){if(1==this.collection.length)return this.collection[0];throw this.collection.length<1?"sequence contains no elements":"collection contains more than one item"}},function(t,n,e){e(0).fn.singleOrDefault=function(t){var n=null!=t,e=n&&"function"==typeof t;if(1==this.collection.length)return this.collection[0];if(1<this.length)throw"collection contains more than one item";return n?e?t():t:null}},function(t,n,e){e(0).fn.skip=function(t){var n=[],e=0<t,o=t<this.collection.length;if(!(e&&o))return this;for(var i=0;i<this.collection.length;i++)i<t||n.push(this.collection[i]);return n.asEnumerable()}},function(t,n,e){e(0).fn.skipWhile=function(t){var n=null!=t,e=n&&"function"==typeof t,o=n&&e,i=0<this.collection.length;if(!n||!e)return this;if(o&&i)for(var l=this.collection.length,c=0;c<this.collection.length;c++){if(!0!==t(c,this.collection[c],this.collection))return this.collection.slice(c,l).asEnumerable()}return[].asEnumerable()}},function(t,n,e){e(0).fn.take=function(t){if(0==this.collection.length)return this;if(this.collection.length>t){for(var n=[],e=0;e<t;e++)n.push(this.collection[e]);return n.asEnumerable()}return this}},function(t,n,e){e(0).fn.takeWhile=function(t){var n=[];if(!(null!=t&&"function"==typeof t))return this;for(var e=0;e<this.collection.length;e++){var o=this.collection[e];if(!0!==t(e,o,this.collection))break;n.push(o)}return n.asEnumerable()}},function(t,n,e){e(0).fn.where=function(t){for(var n=[],e=null!=t,o=e&&"function"==typeof t,i=0;i<this.collection.length;i++){var l=this.collection[i];e&&o&&t(i,l,this.collection)&&n.push(l)}return n.asEnumerable()}}])});
\ No newline at end of file
diff --git a/docs/index.md b/docs/index.md
index 09db777..084f77b 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -357,4 +357,42 @@ Returns the maximum value in a sequence.
 ``` javascript
 var arr = [];
 var result = arr.asEnumerable().maximum();
+```
+
+### dropFirst
+
+Drops the first n number of items in a collection
+
+``` javascript
+var arr = [0,1,2,3];
+var result = arr.asEnumerable().dropFirst(2);
+```
+
+### dropLast
+
+Drops the last n number of items in a collection
+
+``` javascript
+var arr = [0,1,2,3];
+var result = arr.asEnumerable().dropLast(2);
+```
+
+### shuffle
+
+Randomly shuffles the collection
+
+``` javascript
+var arr = [0,1,2,3];
+var result = arr.asEnumerable().shuffle();
+```
+
+### except
+
+returns all items except the ones specified in the input collection
+
+``` javascript
+var arr = [0,1,2,3];
+var result = arr.asEnumerable().except([1,3]);
+
+//returns an enumerable containing [0, 2]
 ```
\ No newline at end of file
diff --git a/package.json b/package.json
index 330bf2e..a7e833c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "asenumerable",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "a JavaScript library that provides linq functions on native JavaScript arrays",
   "dependencies": {},
   "main": "src/enumerable.js",
diff --git a/spec/dropFirst.js b/spec/dropFirst.js
new file mode 100644
index 0000000..4de6994
--- /dev/null
+++ b/spec/dropFirst.js
@@ -0,0 +1,52 @@
+var Enumerable = require('../src/enumerable');
+
+describe("dropFirst", function ()
+{
+    describe("when an enumerable object contains only 10 items", function ()
+    {
+        it("it should drop the first 5 items", function ()
+        {
+            var testArray = new Enumerable([0,1,2,3,4,5,6,7,8,9]);
+
+            var result = testArray.dropFirst(5);
+
+            expect(result).toEqual(new Enumerable([5,6,7,8,9]));
+        });
+    });
+
+    describe("when an enumerable object contains only 10 items", function ()
+    {
+        it("it should return an empty enumerable when asked to drop the first 11", function ()
+        {
+            var testArray = new Enumerable([0,1,2,3,4,5,6,7,8,9]);
+
+            var result = testArray.dropLast(11);
+
+            expect(result).toEqual(new Enumerable());
+        });
+    });
+
+    describe("when an enumerable object contains zero items", function ()
+    {
+        it("it should return an empty enumerable when asked to drop any amount", function ()
+        {
+            var testArray = new Enumerable([]);
+
+            var result = testArray.dropFirst(11);
+
+            expect(result).toEqual(new Enumerable());
+        });
+    });
+
+    describe("when asked to drop a negative number of items", function ()
+    {
+        it("it should return the input enumerable", function ()
+        {
+            var testArray = new Enumerable([1,2,3]);
+
+            var result = testArray.dropFirst(-11);
+
+            expect(result).toEqual(new Enumerable([1,2,3]));
+        });
+    });
+});
\ No newline at end of file
diff --git a/spec/dropLast.js b/spec/dropLast.js
new file mode 100644
index 0000000..e52035a
--- /dev/null
+++ b/spec/dropLast.js
@@ -0,0 +1,52 @@
+var Enumerable = require('../src/enumerable');
+
+describe("dropLast", function ()
+{
+    describe("when an enumerable object contains only 10 items", function ()
+    {
+        it("it should drop the last 5 items", function ()
+        {
+            var testArray = new Enumerable([0,1,2,3,4,5,6,7,8,9]);
+
+            var result = testArray.dropLast(5);
+
+            expect(result).toEqual(new Enumerable([0,1,2,3,4]));
+        });
+    });
+
+    describe("when an enumerable object contains only 10 items", function ()
+    {
+        it("it should return an empty enumerable when asked to drop the last 11", function ()
+        {
+            var testArray = new Enumerable([0,1,2,3,4,5,6,7,8,9]);
+
+            var result = testArray.dropLast(11);
+
+            expect(result).toEqual(new Enumerable());
+        });
+    });
+
+    describe("when an enumerable object contains zero items", function ()
+    {
+        it("it should return an empty enumerable when asked to drop any amount", function ()
+        {
+            var testArray = new Enumerable([]);
+
+            var result = testArray.dropLast(11);
+
+            expect(result).toEqual(new Enumerable());
+        });
+    });
+
+    describe("when asked to drop a negative number of items", function ()
+    {
+        it("it should return the input enumerable", function ()
+        {
+            var testArray = new Enumerable([1,2,3]);
+
+            var result = testArray.dropLast(-11);
+
+            expect(result).toEqual(new Enumerable([1,2,3]));
+        });
+    });
+});
\ No newline at end of file
diff --git a/spec/except.js b/spec/except.js
new file mode 100644
index 0000000..404a794
--- /dev/null
+++ b/spec/except.js
@@ -0,0 +1,36 @@
+var Enumerable = require('../src/enumerable');
+
+describe("except", function ()
+{
+    describe("when an enumerable object has items", function ()
+    {
+        it("should return all items except the ones specified", function ()
+        {
+            var testArray = new Enumerable([0, 1, 2, 3, 4, 5]);
+
+            var result = testArray.except([0, 2, 4]);
+
+            expect(result).toEqual(new Enumerable([1, 3, 5]));
+        });
+    });
+
+    describe("when an enumerable object has items and a custom compare function is specified", function ()
+    {
+        it("should return all items except the ones specified using that equality function", function ()
+        {
+            var testArray = new Enumerable([{name:"a", id:0}, {name:"b", id:1}]);
+
+            var result = testArray.except([{name:"a", id:0}], function(a, b) 
+            { 
+                if(a.name === b.name)
+                {
+                    return true;
+                }
+
+                return false;
+            });
+
+            expect(result).toEqual(new Enumerable([{name:"b", id:1}]));
+        });
+    });
+});
\ No newline at end of file
diff --git a/spec/shuffle.js b/spec/shuffle.js
new file mode 100644
index 0000000..a97f061
--- /dev/null
+++ b/spec/shuffle.js
@@ -0,0 +1,16 @@
+var Enumerable = require('../src/enumerable');
+
+describe("shuffle", function ()
+{
+    describe("when an enumerable object has items", function ()
+    {
+        it("it should shuffle the items", function ()
+        {
+            var testArray = new Enumerable([0, 1, 2, 3]);
+
+            var result = testArray.shuffle();
+
+            expect(result).not.toEqual(new Enumerable([0, 1, 2, 3]));
+        });
+    });
+});
\ No newline at end of file
diff --git a/src/core/dropFirst.js b/src/core/dropFirst.js
new file mode 100644
index 0000000..5b1557f
--- /dev/null
+++ b/src/core/dropFirst.js
@@ -0,0 +1,18 @@
+var Enumerable = require('../enumerable');
+
+Enumerable.fn.dropFirst = function(count)
+{
+    if(count <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    if(this.collection.length > count)
+    {
+        return new Enumerable(this.collection.splice(this.collection.length - count, count));
+    }
+    else
+    {
+        return new Enumerable();
+    }
+};
\ No newline at end of file
diff --git a/src/core/dropLast.js b/src/core/dropLast.js
new file mode 100644
index 0000000..ec7738c
--- /dev/null
+++ b/src/core/dropLast.js
@@ -0,0 +1,18 @@
+var Enumerable = require('../enumerable');
+
+Enumerable.fn.dropLast = function(count)
+{
+    if(count <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    if(this.collection.length > count)
+    {
+        return new Enumerable(this.collection.splice(0, this.collection.length - count));
+    }
+    else
+    {
+        return new Enumerable();
+    }
+};
\ No newline at end of file
diff --git a/src/core/except.js b/src/core/except.js
new file mode 100644
index 0000000..2841a83
--- /dev/null
+++ b/src/core/except.js
@@ -0,0 +1,47 @@
+var Enumerable = require('../enumerable');
+
+Enumerable.fn.except = function(arr, fn)
+{
+    if(this.collection.length <= 0)
+    {
+        return new Enumerable(this.collection);
+    }
+
+    var result = [];
+
+    for(var i = 0; i < this.collection.length; i++)
+    {
+        var item = this.collection[i];
+        
+        var contains = false;
+
+        for(var x = 0; x < arr.length; x++)
+        {
+            var item2 = arr[x];
+
+            if(fn && fn.getType() === "function")
+            {
+                if(fn(item, item2) === true)
+                {
+                    contains = true;
+                    break;
+                }
+            }
+            else
+            {
+                if(item2 === item)
+                {
+                    contains = true;
+                    break;
+                }
+            }
+        }
+
+        if(contains === false)
+        {
+            result.push(item);
+        }
+    }
+
+    return result.asEnumerable();
+};
diff --git a/src/core/shuffle.js b/src/core/shuffle.js
new file mode 100644
index 0000000..69c574a
--- /dev/null
+++ b/src/core/shuffle.js
@@ -0,0 +1,20 @@
+var Enumerable = require('../enumerable');
+
+Enumerable.fn.shuffle = function()
+{
+    var currentIndex = this.collection.length;
+    var temporaryValue;
+    var randomIndex;
+
+    while (0 !== currentIndex) 
+    {
+      randomIndex = Math.floor(Math.random() * currentIndex);
+      currentIndex -= 1;
+    
+      temporaryValue = this.collection[currentIndex];
+      this.collection[currentIndex] = this.collection[randomIndex];
+      this.collection[randomIndex] = temporaryValue;
+    }
+    
+    return new Enumerable(this.collection);
+};
\ No newline at end of file
diff --git a/src/dependencies.js b/src/dependencies.js
index 2141219..5c6db57 100644
--- a/src/dependencies.js
+++ b/src/dependencies.js
@@ -5,8 +5,12 @@ require("./core/any");
 require("./core/count");
 require("./core/first");
 require("./core/firstOrDefault");
+require("./core/dropFirst");
+require("./core/dropLast");
 require("./core/last");
 require("./core/lastOrDefault");
+require("./core/shuffle");
+require("./core/except");
 require("./core/maximum");
 require("./core/minimum");
 require("./core/orderBy");