added groupBy

Author: morrisjdev

dev/Entity.ts

@@ -1,5 +1,5 @@
 namespace Linq4JS {
-    export class Entity implements Entity {
+    export class Entity {
         constructor(_id: number) {
             this.Id = _id;
         }

dev/IArray.ts

@@ -28,6 +28,7 @@
     ThenBy(valueSelector: any): Array<T>;
     OrderByDescending(valueSelector: any): Array<T>;
     ThenByDescending(valueSelector: any): Array<T>;
+    GroupBy(selector: any): Array<Array<T>>;
     Move(oldIndex: number, newIndex: number): Array<T>;
     Distinct(valueSelector: any, takelast?: boolean): Array<T>;
     Contains(object: T): boolean;
@@ -36,4 +37,5 @@
     Aggregate(method: any): string;
     Reverse(): Array<T>;
     Average(selector?: any, filter?: any): number;
+    Sum(selector?: any, filter?: any): number;
 }

dev/Modules/GroupBy.ts

@@ -0,0 +1,34 @@
+Array.prototype.GroupBy = function<T> (selector: any): Array<Array<T>> {
+    let that: Array<T> = this;
+
+    let selectorFunction: Function = Linq4JS.Helper.ConvertFunction(selector);
+
+    let newArray: Array<Array<T>> = new Array();
+
+    let ordered = that.OrderBy(selectorFunction);
+
+    let prev;
+    let newSub = new Array();
+
+    ordered.ForEach(x => {
+        if(prev != null){
+            if(selectorFunction(prev) != selectorFunction(x)){
+                newArray.Add(newSub);
+                newSub = new Array();
+            }
+            else{
+                newSub.Add(x);
+            }
+        }
+        else{
+            newSub.Add(x);
+            prev = x;
+        }
+    });
+
+    if(newSub.Count() > 0){
+        newArray.Add(newSub);
+    }
+
+    return newArray;
+};

dev/Modules/Sum.ts

@@ -0,0 +1,20 @@
+Array.prototype.Sum = function <T>(selector?: any, filter?: any): number {
+    let that: Array<T> = this;
+
+    let result: number = 0;
+    let array: Array<any> = that;
+
+    if (filter != null) {
+        array = array.Where(filter);
+    }
+
+    if(selector != null){
+        array = array.Select(selector);
+    }
+
+    array.ForEach(function(x){
+        result += x;
+    });
+
+    return result;
+};

dist/Linq4JS.d.ts

@@ -1,5 +1,5 @@
 declare namespace Linq4JS {
-    class Entity implements Entity {
+    class Entity {
         constructor(_id: number);
         Id: number;
     }
@@ -40,6 +40,7 @@ interface Array<T> {
     ThenBy(valueSelector: any): Array<T>;
     OrderByDescending(valueSelector: any): Array<T>;
     ThenByDescending(valueSelector: any): Array<T>;
+    GroupBy(selector: any): Array<Array<T>>;
     Move(oldIndex: number, newIndex: number): Array<T>;
     Distinct(valueSelector: any, takelast?: boolean): Array<T>;
     Contains(object: T): boolean;
@@ -48,6 +49,7 @@ interface Array<T> {
     Aggregate(method: any): string;
     Reverse(): Array<T>;
     Average(selector?: any, filter?: any): number;
+    Sum(selector?: any, filter?: any): number;
 }
 declare namespace Linq4JS {
     class OrderEntry {

dist/Linq4JS.js

@@ -296,6 +296,33 @@ Array.prototype.Get = function (index) {
     var that = this;
     return that[index];
 };
+Array.prototype.GroupBy = function (selector) {
+    var that = this;
+    var selectorFunction = Linq4JS.Helper.ConvertFunction(selector);
+    var newArray = new Array();
+    var ordered = that.OrderBy(selectorFunction);
+    var prev;
+    var newSub = new Array();
+    ordered.ForEach(function (x) {
+        if (prev != null) {
+            if (selectorFunction(prev) != selectorFunction(x)) {
+                newArray.Add(newSub);
+                newSub = new Array();
+            }
+            else {
+                newSub.Add(x);
+            }
+        }
+        else {
+            newSub.Add(x);
+            prev = x;
+        }
+    });
+    if (newSub.Count() > 0) {
+        newArray.Add(newSub);
+    }
+    return newArray;
+};
 Array.prototype.Insert = function (object, index) {
     var that = this;
     that.splice(index, 0, object);
@@ -443,6 +470,21 @@ Array.prototype.Skip = function (count) {
     var that = this;
     return that.slice(count, that.Count());
 };
+Array.prototype.Sum = function (selector, filter) {
+    var that = this;
+    var result = 0;
+    var array = that;
+    if (filter != null) {
+        array = array.Where(filter);
+    }
+    if (selector != null) {
+        array = array.Select(selector);
+    }
+    array.ForEach(function (x) {
+        result += x;
+    });
+    return result;
+};
 Array.prototype.Take = function (count) {
     var that = this;
     return that.slice(0, count);

dist/Linq4JS.min.js

@@ -1,12 +1,7 @@
-var gulp = require('gulp');
+var gulp = require("gulp");
 
 var minify = require("gulp-minify");
-var concat = require("gulp-concat");
-var rename = require("gulp-rename");
-var less = require("gulp-less");
-var cleancss = require("gulp-clean-css");
 var typescript = require("gulp-typescript");
-var autoprefixer = require("gulp-autoprefixer");
 var merge = require("merge2");
 
 var browsersync = require("browser-sync").create();
@@ -80,7 +75,7 @@ gulp.task("server", ["browsersync"], function () {
     gulp.watch("test/**/*.ts", ["testts"]);
     gulp.watch("dev/**/*.ts", ["typescript"]);
 
-    gulp.watch("**/*.html").on("change", browsersync.reload);
+    gulp.watch("demo/**/*.html").on("change", browsersync.reload);
     gulp.watch("dist/**/*.js").on("change", browsersync.reload);
     gulp.watch("demo/**/*.js").on("change", browsersync.reload);
     gulp.watch("test/**/*.js").on("change", browsersync.reload);

gulpfile.js

@@ -1,6 +1,6 @@
 {
   "name": "linq4js",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "description": "Linq methods for JavaScript/TypeScript for working with Arrays",
   "main": "dist/Linq4JS.js",
   "typings": "dist/Linq4JS.d.ts",
@@ -27,14 +27,8 @@
   "devDependencies": {
     "browser-sync": "^2.18.6",
     "gulp": "^3.9.1",
-    "gulp-autoprefixer": "^3.1.1",
-    "gulp-clean-css": "^2.3.2",
-    "gulp-concat": "^2.6.1",
     "gulp-connect": "^5.0.0",
-    "gulp-connect-php": "0.0.8",
-    "gulp-less": "^3.3.0",
     "gulp-minify": "0.0.14",
-    "gulp-rename": "^1.2.2",
     "gulp-typescript": "^3.1.4",
     "merge2": "^1.0.3",
     "typescript": "^2.1.5"