added _.isArray definition

lodash/lodash-tests.ts

@@ -570,6 +570,7 @@ result = <any>_.forInRight(new Dog('Dagny'), function(value, key) {
   console.log(key);
 });
 
+
 result = <any>_.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
   console.log(key);
 });
@@ -587,6 +588,9 @@ result = <any>_.invert({ 'first': 'moe', 'second': 'larry' });
 
 (function(...args: any[]) { return <boolean>_.isArguments(arguments); })(1, 2, 3);
 
+(function () { return _.isArray(arguments); })();
+_.isArray([1, 2, 3]);
+
 var mergeNames = {
   'stooges': [
     { 'name': 'moe' },
@@ -666,9 +670,6 @@ _.isEmpty({});
 
 _.isElement($('body')[0]);
 
-(function () { return _.isArray(arguments); })();
-_.isArray([1, 2, 3]);
-
 _.isObject({});
 _.isObject(1);
 

lodash/lodash.d.ts

@@ -2353,6 +2353,13 @@ declare module _ {
 	**/
 	export function isArguments(value: any): boolean;
 
+	/**
+	* Checks if value is an array.
+	* @param value The value to check.
+	* @return True if the value is an array, else false.
+	**/
+	export function isArray(value: any): boolean;
+
 	/**
 	* Recursively merges own enumerable properties of the source object(s), that don't resolve 
 	* to undefined into the destination object. Subsequent sources will overwrite property 
@@ -2589,13 +2596,6 @@ declare module _ {
 	**/
 	export function isElement(object: any): boolean;
 
-	/**
-	* Returns true if object is an Array.
-	* @param object Check if this object is an Array.
-	* @return True if `object` is an Array, otherwise false.
-	**/
-	export function isArray(object: any): boolean;
-
 	/**
 	* Returns true if value is an Object. Note that JavaScript arrays and functions are objects,
 	* while (normal) strings and numbers are not.