From b0de51a2abc54f01ebe17ca83321d0d6cdef08ed Mon Sep 17 00:00:00 2001
From: "Sahar Rachamim (Kishu)" <srachamim@gmail.com>
Date: Mon, 26 Apr 2021 02:10:41 +0300
Subject: [PATCH] Change the signature of make

Accept readonly arrays as input.
---
 docs/modules/Zipper.ts.md | 2 +-
 src/Zipper.ts             | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/docs/modules/Zipper.ts.md b/docs/modules/Zipper.ts.md
index b7d9ba8..ff23faf 100644
--- a/docs/modules/Zipper.ts.md
+++ b/docs/modules/Zipper.ts.md
@@ -418,7 +418,7 @@ Creates a new zipper.
 **Signature**
 
 ```ts
-export declare const make: <A>(lefts: A[], focus: A, rights: A[]) => Zipper<A>
+export declare const make: <A>(lefts: readonly A[], focus: A, rights: readonly A[]) => Zipper<A>
 ```
 
 Added in v0.1.6
diff --git a/src/Zipper.ts b/src/Zipper.ts
index 2ee29a7..98f1ac0 100644
--- a/src/Zipper.ts
+++ b/src/Zipper.ts
@@ -58,10 +58,14 @@ export interface Zipper<A> {
  * @category constructors
  * @since 0.1.6
  */
-export const make: <A>(lefts: Array<A>, focus: A, rights: Array<A>) => Zipper<A> = (lefts, focus, rights) => ({
+export const make: <A>(lefts: ReadonlyArray<A>, focus: A, rights: ReadonlyArray<A>) => Zipper<A> = (
   lefts,
   focus,
   rights
+) => ({
+  lefts: lefts.slice(),
+  focus,
+  rights: rights.slice()
 })
 
 /**