From 657e6949d6ba6127c9dcfd735dc2afec18f8ce11 Mon Sep 17 00:00:00 2001
From: eyas-ranjous <eyas.ranjous@gmail.com>
Date: Mon, 8 Sep 2025 00:45:05 -0700
Subject: [PATCH 1/2] fix null types

---
 src/deque.d.ts | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/deque.d.ts b/src/deque.d.ts
index 02b1de8..bda5e19 100644
--- a/src/deque.d.ts
+++ b/src/deque.d.ts
@@ -1,11 +1,11 @@
 export class Deque<T> {
   constructor(elements?: T[]);
-  pushFront(element: T): Deque<T>;
-  pushBack(element: T): Deque<T>;
-  popFront(): T;
-  popBack(): T;
+  pushFront(element: T): Deque<T> | null;
+  pushBack(element: T): Deque<T> | null;
+  popFront(): T | null;
+  popBack(): T | null;
   front(): T;
-  back(): T;
+  back(): T | null;
   toArray(): T[];
   isEmpty(): boolean;
   size(): number;

From 7ecceefdb1331ed327959bca5a35eabb7555eb93 Mon Sep 17 00:00:00 2001
From: eyas-ranjous <eyas.ranjous@gmail.com>
Date: Mon, 8 Sep 2025 00:46:25 -0700
Subject: [PATCH 2/2] null

---
 src/deque.d.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/deque.d.ts b/src/deque.d.ts
index bda5e19..f0a5c74 100644
--- a/src/deque.d.ts
+++ b/src/deque.d.ts
@@ -1,10 +1,10 @@
 export class Deque<T> {
   constructor(elements?: T[]);
-  pushFront(element: T): Deque<T> | null;
-  pushBack(element: T): Deque<T> | null;
+  pushFront(element: T): Deque<T>;
+  pushBack(element: T): Deque<T>;
   popFront(): T | null;
   popBack(): T | null;
-  front(): T;
+  front(): T | null;
   back(): T | null;
   toArray(): T[];
   isEmpty(): boolean;