From 48de9e15a3ef6e65d949d707aa1778ff22dc8db6 Mon Sep 17 00:00:00 2001
From: Vyrtsev Mikhail <reeywhaar@gmail.com>
Date: Sun, 7 Jul 2019 22:04:28 +0300
Subject: [PATCH] add shallow compare util

---
 frontend/app/utils/shallowCompare.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 frontend/app/utils/shallowCompare.ts

diff --git a/frontend/app/utils/shallowCompare.ts b/frontend/app/utils/shallowCompare.ts
new file mode 100644
index 00000000..7c17ec05
--- /dev/null
+++ b/frontend/app/utils/shallowCompare.ts
@@ -0,0 +1,10 @@
+export function shallowCompare<T extends object>(a: T, b: T): boolean {
+  const entriesA = Object.entries(a);
+  const keysB = Object.keys(b);
+  if (entriesA.length !== keysB.length) return false;
+  for (const [key, value] of entriesA) {
+    // @ts-ignore
+    if (value !== b[key]) return false;
+  }
+  return true;
+}