url: replaced slice with at

PR-URL: #59181
Reviewed-By: Jordan Harband <ljharb@gmail.com>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Daniel Lemire <daniel@lemire.me>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: Connormiha

lib/url.js

@@ -22,10 +22,12 @@
 'use strict';
 
 const {
+  ArrayPrototypeJoin,
   Boolean,
   Int8Array,
   ObjectAssign,
   ObjectKeys,
+  StringPrototypeAt,
   StringPrototypeCharCodeAt,
   StringPrototypeIndexOf,
   StringPrototypeReplaceAll,
@@ -923,7 +925,7 @@ Url.prototype.resolveObject = function resolveObject(relative) {
   // If a url ENDs in . or .., then it must get a trailing slash.
   // however, if it ends in anything else non-slashy,
   // then it must NOT get a trailing slash.
-  let last = srcPath.slice(-1)[0];
+  let last = srcPath[srcPath.length - 1];
   const hasTrailingSlash = (
     ((result.host || relative.host || srcPath.length > 1) &&
     (last === '.' || last === '..')) || last === '');
@@ -956,7 +958,7 @@ Url.prototype.resolveObject = function resolveObject(relative) {
     srcPath.unshift('');
   }
 
-  if (hasTrailingSlash && (srcPath.join('/').slice(-1) !== '/')) {
+  if (hasTrailingSlash && StringPrototypeAt(ArrayPrototypeJoin(srcPath, '/'), -1) !== '/') {
     srcPath.push('');
   }