Add Array.Empty (#53)

index.d.ts

@@ -17,3 +17,7 @@ interface Array<T> {
   Union<T>(adder: Array<T>): Array<T>;
   Where<T>(predicate: (X: T) => boolean): Array<T>;
 }
+
+interface Array {
+  Empty(): Array<any>;
+}

index.js

@@ -13,13 +13,15 @@ const TakeWhile = require('./src/TakeWhile');
 const ToDictionary = require('./src/ToDictionary');
 const Union = require('./src/Union');
 const Where = require('./src/Where');
+const Empty = require('./src/Empty')
 
 const bindAll = function() {
   Array.prototype.Aggregate = Aggregate;
   Array.prototype.All = All;
   Array.prototype.Concat = Concat;
   Array.prototype.Count = Count;
   Array.prototype.ElementAt = ElementAt;
+  Array.Empty = Empty;
   Array.prototype.First = First;
   Array.prototype.Last = Last;
   Array.prototype.Prepend = Prepend;
@@ -32,4 +34,4 @@ const bindAll = function() {
   Array.prototype.Where = Where;
 };
 
-module.exports = bindAll;
+module.exports = bindAll;

src/Empty.js

@@ -0,0 +1,9 @@
+/**
+ * Returns an empty array
+ * @returns {Array}
+ */
+function Empty() {
+    return [];
+}
+
+module.exports = Empty;

test/Empty.spec.js

@@ -0,0 +1,12 @@
+const expect = require('chai').expect;
+require('..')();
+
+describe('Array#Empty', function() {
+
+    it('Should return an empty array', function() {
+        const expected = [];
+        const actual = Array.Empty();
+
+        expect(actual).to.eql(expected);
+    });
+});