lodash: added _.isMap

lodash/lodash-tests.ts

@@ -6620,6 +6620,37 @@ module TestIsLength {
     }
 }
 
+// _.isMap
+module TestIsMap {
+    {
+        let value: number|Map<string, number>;
+
+        if (_.isMap<string, number>(value)) {
+            let result: Map<string, number> = value;
+        }
+        else {
+            let result: number = value;
+        }
+    }
+
+    {
+        let result: boolean;
+
+        result = _.isMap(any);
+        result = _(1).isMap();
+        result = _<any>([]).isMap();
+        result = _({}).isMap();
+    }
+
+    {
+        let result: _.LoDashExplicitWrapper<boolean>;
+
+        result = _(1).chain().isMap();
+        result = _<any>([]).chain().isMap();
+        result = _({}).chain().isMap();
+    }
+}
+
 // _.isMatch
 module TestIsMatch {
     let testIsMatchCustiomizerFn: (value: any, other: any, indexOrKey: number|string) => boolean;

lodash/lodash.d.ts

@@ -11516,6 +11516,31 @@ declare module _ {
         isLength(): LoDashExplicitWrapper<boolean>;
     }
 
+    //_.isMap
+    interface LoDashStatic {
+        /**
+         * Checks if value is classified as a Map object.
+         *
+         * @param value The value to check.
+         * @returns Returns true if value is correctly classified, else false.
+         */
+        isMap<K, V>(value?: any): value is Map<K, V>;
+    }
+
+    interface LoDashImplicitWrapperBase<T, TWrapper> {
+        /**
+         * @see _.isMap
+         */
+        isMap(): boolean;
+    }
+
+    interface LoDashExplicitWrapperBase<T, TWrapper> {
+        /**
+         * @see _.isMap
+         */
+        isMap(): LoDashExplicitWrapper<boolean>;
+    }
+
     //_.isMatch
     interface isMatchCustomizer {
         (value: any, other: any, indexOrKey?: number|string): boolean;