Added chainable definitions for _(...).first and aliases

lodash/lodash-tests.ts

@@ -183,6 +183,14 @@ result = <number[]>_.first([1, 2, 3], function (num) {
 result = <IFoodOrganic[]>_.first(foodsOrganic, 'organic');
 result = <IFoodType[]>_.first(foodsType, { 'type': 'fruit' });
 
+result = <number>_([1, 2, 3]).first();
+result = <number[]>_([1, 2, 3]).first(2).value();
+result = <number[]>_([1, 2, 3]).first(function (num) {
+    return num < 3;
+}).value();
+result = <IFoodOrganic[]>_(foodsOrganic).first('organic').value();
+result = <IFoodType[]>_(foodsType).first({ 'type': 'fruit' }).value();
+
 result = <number>_.head([1, 2, 3]);
 result = <number[]>_.head([1, 2, 3], 2);
 result = <number[]>_.head([1, 2, 3], function (num) {
@@ -191,12 +199,28 @@ result = <number[]>_.head([1, 2, 3], function (num) {
 result = <IFoodOrganic[]>_.head(foodsOrganic, 'organic');
 result = <IFoodType[]>_.head(foodsType, { 'type': 'fruit' });
 
+result = <number>_([1, 2, 3]).head();
+result = <number[]>_([1, 2, 3]).head(2).value();
+result = <number[]>_([1, 2, 3]).head(function (num) {
+    return num < 3;
+}).value();
+result = <IFoodOrganic[]>_(foodsOrganic).head('organic').value();
+result = <IFoodType[]>_(foodsType).head({ 'type': 'fruit' }).value();
+
 result = <number>_.take([1, 2, 3]);
 result = <number[]>_.take([1, 2, 3], 2);
 result = <number[]>_.take([1, 2, 3], (num) => num < 3);
 result = <IFoodOrganic[]>_.take(foodsOrganic, 'organic');
 result = <IFoodType[]>_.take(foodsType, { 'type': 'fruit' });
 
+result = <number>_([1, 2, 3]).take();
+result = <number[]>_([1, 2, 3]).take(2).value();
+result = <number[]>_([1, 2, 3]).take(function (num) {
+    return num < 3;
+}).value();
+result = <IFoodOrganic[]>_(foodsOrganic).take('organic').value();
+result = <IFoodType[]>_(foodsType).take({ 'type': 'fruit' }).value();
+
 result = <number[]>_.flatten([1, [2], [3, [[4]]]]);
 result = <any[]>_.flatten([1, [2], [3, [[4]]]], true);
 var result: any

lodash/lodash.d.ts

@@ -644,6 +644,104 @@ declare module _ {
             whereValue: W): T[];
     }
 
+    interface LoDashArrayWrapper<T> {
+        /**
+        * @see _.first
+        **/
+        first(): T;
+
+        /**
+        * @see _.first
+        * @param n The number of elements to return.
+        **/
+        first(n: number): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param callback The function called per element.
+        * @param [thisArg] The this binding of callback.
+        **/
+        first(
+            callback: ListIterator<T, boolean>,
+            thisArg?: any): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param pluckValue "_.pluck" style callback value
+        **/
+        first(pluckValue: string): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param whereValue "_.where" style callback value
+        **/
+        first<W>(whereValue: W): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        **/
+        head(): T;
+
+        /**
+        * @see _.first
+        * @param n The number of elements to return.
+        **/
+        head(n: number): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param callback The function called per element.
+        * @param [thisArg] The this binding of callback.
+        **/
+        head(
+            callback: ListIterator<T, boolean>,
+            thisArg?: any): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param pluckValue "_.pluck" style callback value
+        **/
+        head(pluckValue: string): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param whereValue "_.where" style callback value
+        **/
+        head<W>(whereValue: W): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        **/
+        take(): T;
+
+        /**
+        * @see _.first
+        * @param n The number of elements to return.
+        **/
+        take(n: number): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param callback The function called per element.
+        * @param [thisArg] The this binding of callback.
+        **/
+        take(
+            callback: ListIterator<T, boolean>,
+            thisArg?: any): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param pluckValue "_.pluck" style callback value
+        **/
+        take(pluckValue: string): LoDashArrayWrapper<T>;
+
+        /**
+        * @see _.first
+        * @param whereValue "_.where" style callback value
+        **/
+        take<W>(whereValue: W): LoDashArrayWrapper<T>;
+    }
+
     //_.flatten
     interface LoDashStatic {
         /**