Merge pull request #5117 from chrootsu/lodash-negate

lodash: added _.negate() method

lodash/lodash-tests.ts

@@ -893,9 +893,22 @@ result = <string[]>result(1, true);
 result = <ModArgsResult>_<ModArgsFunc>((x: string, y: string) => [x, y]).modArgs<ModArgsResult>([modArgsFn1, modArgsFn2]).value();
 result = <string[]>result(1, true);
 
+// _.negate
+interface TestNegatePredicate {
+    (a1: number, a2: number): boolean;
+}
+interface TestNegateResult {
+    (a1: number, a2: number): boolean;
+}
+var testNegatePredicate = (a1: number, a2: number) => a1 > a2;
+result = <TestNegateResult>_.negate<TestNegatePredicate>(testNegatePredicate);
+result = <TestNegateResult>_.negate<TestNegatePredicate, TestNegateResult>(testNegatePredicate);
+result = <TestNegateResult>_(testNegatePredicate).negate().value();
+result = <TestNegateResult>_(testNegatePredicate).negate<TestNegateResult>().value();
+
 var initialize = _.once(function () { });
 initialize();
-initialize();''
+initialize();
 var returnedOnce = _.throttle(function (a: any) { return a * 5; }, 5);
 returnedOnce(4);
 

lodash/lodash.d.ts

@@ -5474,6 +5474,34 @@ declare module _ {
         modArgs<TResult>(transforms: Function[]): LoDashObjectWrapper<TResult>;
     }
 
+    //_.negate
+    interface LoDashStatic {
+        /**
+         * Creates a function that negates the result of the predicate func. The func predicate is invoked with
+         * the this binding and arguments of the created function.
+         * @param predicate The predicate to negate.
+         * @return Returns the new function.
+         */
+        negate<T extends Function>(predicate: T): (...args: any[]) => boolean;
+
+        /**
+         * @see _.negate
+         */
+        negate<T extends Function, TResult extends Function>(predicate: T): TResult;
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+         * @see _.negate
+         */
+        negate(): LoDashObjectWrapper<(...args: any[]) => boolean>;
+
+        /**
+         * @see _.negate
+         */
+        negate<TResult extends Function>(): LoDashObjectWrapper<TResult>;
+    }
+
     //_.once
     interface LoDashStatic {
         /**