From 5c3225273c2b85c0129b6c6adc8ceabf7b5f3920 Mon Sep 17 00:00:00 2001
From: Matei Adriel <rafaeladriel11@gmail.com>
Date: Thu, 19 Dec 2019 20:23:59 +0200
Subject: [PATCH] typescript(option): fix: fixed fold returning void

Signed-off-by: prescientmoon <git@moonythm.dev>
---
 typescript/option/src/helpers.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/typescript/option/src/helpers.ts b/typescript/option/src/helpers.ts
index bb455ad..b248d65 100644
--- a/typescript/option/src/helpers.ts
+++ b/typescript/option/src/helpers.ts
@@ -49,7 +49,7 @@ export const fold = <T, U>(
     initial: U,
     option: Option<T>
 ) => {
-    match(option, v => folder(initial, v), always(initial))
+    return match(option, v => folder(initial, v), always(initial))
 }
 
 export const foldback = <T, U>(
@@ -92,7 +92,7 @@ export const withDefault = <T>(_default: T, option: Option<T>) => {
 
 const checkIfOption = <T>(x): x is Option<T> => x[isOption]
 
-export const flat = <T>(option: Option<T>) => {
+export const flat = <T, U>(option: Option<T>): Option<U> => {
     return match(
         option,
         inner => {