refactor(lib): add Curry

src/lib/Curry.ts

@@ -0,0 +1,15 @@
+/**
+ * Created by tushar.mathur on 15/10/16.
+ */
+
+export interface ICurryFunction<T> {
+  (...k: any[]): T | ICurryFunction<T>
+}
+
+export function Curry <T, R> (f: ICurryFunction<T>): ICurryFunction<T> {
+  return function curried (...t: any[]): T | ICurryFunction<T> {
+    if (t.length === 0) return curried
+    if (t.length === f.length) return f(...t)
+    return curried.bind(this, ...t)
+  }
+}

test/test.Curry.ts

@@ -0,0 +1,27 @@
+/**
+ * Created by tushar.mathur on 15/10/16.
+ */
+
+import test from 'ava'
+import {Curry, ICurryFunction} from '../src/lib/Curry'
+
+const func = Curry<number[], number>(
+  (a: number, b: number, c: number) => [a, b, c]
+)
+
+
+test('func(1, 2, 3)', t => {
+  t.deepEqual(func(1, 2, 3), [1, 2, 3])
+})
+
+test('func(1, 2)(3)', t => {
+  const func2 = func(1, 2) as ICurryFunction<number[]>
+  t.deepEqual(func2(3), [1, 2, 3])
+})
+
+test('func(1)(2)(3)', t => {
+  t.deepEqual((
+      (func(1) as ICurryFunction<number[]>)(2) as ICurryFunction<number[]>)(3),
+    [1, 2, 3]
+  )
+})