From 4ee8a80a1720cb499674462715ac024234a8904c Mon Sep 17 00:00:00 2001
From: Bruce Weirdan <weirdan@gmail.com>
Date: Sun, 13 Feb 2022 07:09:28 +0200
Subject: [PATCH] Use array_fill_keys

There was a number of calls to `array_map(fn()=>true, array_flip($array))` that got replaced with a simpler (and more performant) `array_fill_keys($array, true)`
---
 .../Internal/Provider/StatementsProvider.php  | 23 ++++---------------
 1 file changed, 4 insertions(+), 19 deletions(-)

diff --git a/src/Psalm/Internal/Provider/StatementsProvider.php b/src/Psalm/Internal/Provider/StatementsProvider.php
index 03df6b2f113..f78bd3e83b9 100644
--- a/src/Psalm/Internal/Provider/StatementsProvider.php
+++ b/src/Psalm/Internal/Provider/StatementsProvider.php
@@ -21,7 +21,7 @@
 use Throwable;
 
 use function abs;
-use function array_flip;
+use function array_fill_keys;
 use function array_intersect_key;
 use function array_map;
 use function array_merge;
@@ -216,15 +216,8 @@ public function getStatementsForFile(
                         $file_contents
                     );
 
-                $unchanged_members = array_map(
-                    fn(int $_): bool => true,
-                    array_flip($unchanged_members)
-                );
-
-                $unchanged_signature_members = array_map(
-                    fn(int $_): bool => true,
-                    array_flip($unchanged_signature_members)
-                );
+                $unchanged_members = array_fill_keys($unchanged_members, true);
+                $unchanged_signature_members = array_fill_keys($unchanged_signature_members, true);
 
                 $file_path_hash = md5($file_path);
 
@@ -239,15 +232,7 @@ function (string $key) use ($file_path_hash): string {
                     $changed_members
                 );
 
-                $changed_members = array_map(
-                    /**
-                     * @param int $_
-                     *
-                     * @return bool
-                     */
-                    fn($_): bool => true,
-                    array_flip($changed_members)
-                );
+                $changed_members = array_fill_keys($changed_members, true);
 
                 if (isset($this->unchanged_members[$file_path])) {
                     $this->unchanged_members[$file_path] = array_intersect_key(