From bb69e772283c240e0b29263799686e03cbb6acb1 Mon Sep 17 00:00:00 2001
From: Daniel Lytkin <gaelco.salmon@gmail.com>
Date: Wed, 22 Aug 2018 12:32:46 +0700
Subject: [PATCH 1/2] Make `wu.find` return `T | undefined`

---
 types/wu/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/wu/index.d.ts b/types/wu/index.d.ts
index 3d44b5140f..354b0303c7 100644
--- a/types/wu/index.d.ts
+++ b/types/wu/index.d.ts
@@ -30,7 +30,7 @@ declare namespace wu {
 	function enumerate<T>(iter: Iterable<T>): Iterable<[number, T]>;
 	function every<T>(fn: Filter<T>, iter: Iterable<T>): boolean;
 	function filter<T>(fn: Filter<T>, iter: Iterable<T>): WuIterable<T>;
-	function find<T>(fn: Filter<T>, iter: Iterable<T>): T;
+	function find<T>(fn: Filter<T>, iter: Iterable<T>): T | undefined;
 	function flatten(iter: Iterable<any>): WuIterable<any>;
 	function flatten(shallow: boolean, iter: Iterable<any>): WuIterable<any>;
 	function forEach<T>(fn: Consumer<T>, iter: Iterable<T>): void;

From c51f9514f5232b7f8d40f678b13cad7be7ce2b98 Mon Sep 17 00:00:00 2001
From: Daniel Lytkin <gaelco.salmon@gmail.com>
Date: Wed, 22 Aug 2018 12:35:32 +0700
Subject: [PATCH 2/2] Make `WuIterable.find` return `T | undefined`

---
 types/wu/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/wu/index.d.ts b/types/wu/index.d.ts
index 354b0303c7..08a1b9f19a 100644
--- a/types/wu/index.d.ts
+++ b/types/wu/index.d.ts
@@ -79,7 +79,7 @@ declare namespace wu {
 		enumerate(): Iterable<[number, T]>;
 		every(fn: Filter<T>): boolean;
 		filter(fn: Filter<T>): WuIterable<T>;
-		find(fn: Filter<T>): T;
+		find(fn: Filter<T>): T | undefined;
 		flatten(shallow?: boolean): WuIterable<any>;
 		forEach(fn: Consumer<T>): void;
 		has(t: T): boolean;