updated readme, fixed groupby

Author: morrisjdev

README.md

@@ -332,6 +332,26 @@ var array2 = [3, 4, 5];
 array2.Average();
 ```
 
+### Sum
+
+Computes the sum of the elements
+
+```javascript
+var array = [{val: 5}, {val: 3}, {val: 1}];
+
+//9
+array.Sum("x => x.val");
+
+//8
+array.Sum("x => x.val", "x => x.val > 1");
+
+
+var array2 = [3, 4, 5];
+
+//12
+array2.Sum();
+```
+
 ### First
 
 Returns the First item of the array and if a filter was set the first item that matches the filter - Throws an Exception if no item was found
@@ -436,6 +456,25 @@ var array = ["item1", "item2", "item3", "item4"];
 array.Skip(2);
 ```
 
+### GroupBy
+
+Group Array by Property
+
+```javascript
+var array = [
+	{name: "Max", age: 17},
+	{name: "Emily", age: 54},
+	{name: "max", age: 32},
+	{name: "emily", age: 12}
+];
+
+//[
+//	[{name: "Emily", age: 54},{name: "emily", age: 12}],
+//	[{name: "Max", age: 17},{name: "max", age: 32}]
+//]
+array.GroupBy("i => i.name.toLowerCase()");
+```
+
 ### OrderBy & OrderByDescending
 
 Order Array by Property or Value

dev/IArray.ts

@@ -1,5 +1,6 @@
 interface Array<T> {
     Order: Array<Linq4JS.OrderEntry>;
+    GroupValue: any;
 
     Clone(): Array<T>;
     FindIndex(filter: any): number;

dev/Modules/GroupBy.ts

@@ -15,15 +15,15 @@
             if(selectorFunction(prev) != selectorFunction(x)){
                 newArray.Add(newSub);
                 newSub = new Array();
-            }
-            else{
-                newSub.Add(x);
+                newSub.GroupValue = selectorFunction(x);
             }
         }
         else{
-            newSub.Add(x);
-            prev = x;
+            newSub.GroupValue = selectorFunction(x);
         }
+
+        newSub.Add(x);
+        prev = x;
     });
 
     if(newSub.Count() > 0){

dist/Linq4JS.d.ts

@@ -13,6 +13,7 @@ declare namespace Linq4JS {
 }
 interface Array<T> {
     Order: Array<Linq4JS.OrderEntry>;
+    GroupValue: any;
     Clone(): Array<T>;
     FindIndex(filter: any): number;
     Get(index: number): T;

dist/Linq4JS.js

@@ -308,15 +308,14 @@ Array.prototype.GroupBy = function (selector) {
             if (selectorFunction(prev) != selectorFunction(x)) {
                 newArray.Add(newSub);
                 newSub = new Array();
-            }
-            else {
-                newSub.Add(x);
+                newSub.GroupValue = selectorFunction(x);
             }
         }
         else {
-            newSub.Add(x);
-            prev = x;
+            newSub.GroupValue = selectorFunction(x);
         }
+        newSub.Add(x);
+        prev = x;
     });
     if (newSub.Count() > 0) {
         newArray.Add(newSub);

dist/Linq4JS.min.js

@@ -1,6 +1,6 @@
 {
   "name": "linq4js",
-  "version": "1.0.9",
+  "version": "1.1.0",
   "description": "Linq methods for JavaScript/TypeScript for working with Arrays",
   "main": "dist/Linq4JS.js",
   "typings": "dist/Linq4JS.d.ts",