Merge pull request #26091 from rayhaneh/Ramda-differenceWith-Typing

[ramda] Updated differenceWith typing

types/ramda/index.d.ts

@@ -22,6 +22,7 @@
 //                 Bonggyun Lee <https://github.com/deptno>
 //                 Maciek Blim <https://github.com/blimusiek>
 //                 Marcin Biernat <https://github.com/biern>
+//                 Rayhaneh Banyassady <https://github.com/rayhaneh>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -523,6 +524,8 @@ declare namespace R {
          * elements.
          */
         differenceWith<T>(pred: (a: T, b: T) => boolean, list1: ReadonlyArray<T>, list2: ReadonlyArray<T>): T[];
+        differenceWith<T>(pred: (a: T, b: T) => boolean): (list1: ReadonlyArray<T>, list2: ReadonlyArray<T>) => T[];
+        differenceWith<T>(pred: (a: T, b: T) => boolean, list1: ReadonlyArray<T>): (list2: ReadonlyArray<T>) => T[];
 
         /*
          * Returns a new object that does not contain a prop property.

types/ramda/ramda-tests.ts

@@ -1957,6 +1957,12 @@ class Rectangle {
     const l1 = [{a: 1}, {a: 2}, {a: 3}];
     const l2 = [{a: 3}, {a: 4}];
     R.differenceWith(cmp, l1, l2); // => [{a: 1}, {a: 2}]
+
+    const differenceWithCurried1 = R.differenceWith(cmp);
+    differenceWithCurried1(l1, l2); // =>[{a: 1}, {a: 2}]
+
+    const differenceWithCurried2 = R.differenceWith(cmp, l1);
+    differenceWithCurried2(l2); // =>[{a: 1}, {a: 2}]
 };
 
 () => {