From e7b35daf459499ce95fbfcb90bc1bb5d4ab286d4 Mon Sep 17 00:00:00 2001
From: Alexander Rose <alexander.rose@weirdbyte.de>
Date: Thu, 29 Dec 2022 10:20:36 -0800
Subject: [PATCH] improve structure/unit areEqual methods

- always equal when objects are identical
---
 src/mol-model/structure/structure/structure.ts | 1 +
 src/mol-model/structure/structure/unit.ts      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/mol-model/structure/structure/structure.ts b/src/mol-model/structure/structure/structure.ts
index 46abc6d3b..e42d697cc 100644
--- a/src/mol-model/structure/structure/structure.ts
+++ b/src/mol-model/structure/structure/structure.ts
@@ -1059,6 +1059,7 @@ namespace Structure {
     }
 
     export function areUnitIdsAndIndicesEqual(a: Structure, b: Structure) {
+        if (a === b) return true;
         if (!areUnitIdsEqual(a, b)) return false;
 
         for (let i = 0, il = a.units.length; i < il; i++) {
diff --git a/src/mol-model/structure/structure/unit.ts b/src/mol-model/structure/structure/unit.ts
index fe2c5b7b8..8d64234ad 100644
--- a/src/mol-model/structure/structure/unit.ts
+++ b/src/mol-model/structure/structure/unit.ts
@@ -490,6 +490,7 @@ namespace Unit {
     }
 
     export function areConformationsEqual(a: Unit, b: Unit) {
+        if (a === b) return true;
         if (!SortedArray.areEqual(a.elements, b.elements)) return false;
         return isSameConformation(a, b.model);
     }
-- 
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