Fix deprecation of util.isArray with Array.isArray

isArray.md

@@ -0,0 +1,75 @@
+# Deprecation isArray Fix
+
+## Identify the Deprecation Warning
+
+- The `DeprecationWarning: The util.isArray API is deprecated` occurs due to the usage of `util.isArray` in certain libraries.
+
+## Fork the Library on GitHub
+
+- Fork the affected library's repository to your GitHub account (e.g., `[email protected]:YourUsername/library.git`) to make necessary modifications.****
+
+## Clone and Modify the Fork
+
+- Clone the fork to your local machine and replace the deprecated `util.isArray` with `Array.isArray` in the relevant files.
+
+  Example change:
+
+  ```js
+  // Original code
+  var isArray = require('util').isArray;
+
+  // Modified code
+  var isArray = Array.isArray;
+  ```
+
+## Create a Patch for the Fix
+
+- Use `patch-package` to create a patch after modifying the code. This allows the fix to be reapplied after each package installation.
+
+### Install patch-package
+
+- Run the following command:
+
+  ```bash
+  npm install patch-package postinstall-postinstall
+  ```
+
+### Apply the Fix with patch-package
+
+- Create and apply the patch with:
+
+  ```bash
+  npx patch-package library
+  ```
+
+### Set postinstall Script
+
+- Add a postinstall script in `package.json` to ensure the patch is reapplied automatically:
+
+  ```json
+  "scripts": {
+    "postinstall": "patch-package"
+  }
+  ```
+
+## Install Dependencies
+
+- Run `npm install` to apply the patch and install the necessary dependencies.
+
+## Update Package Dependency
+
+- Modify your project's `package.json` to use the forked version of the library:
+
+  ```json
+  "dependencies": {
+    "connect-flash": "git+ssh://[email protected]:YourUsername/library.git"
+  }
+  ```
+
+## Install the Forked Version
+
+- Execute `npm install` to install the library from your forked repository.
+
+## Test the Fix
+
+- Ensure the deprecation warning is resolved and your application runs without any issues.

lib/flash.js

@@ -2,8 +2,7 @@
  * Module dependencies.
  */
 var format = require('util').format;
-var isArray = require('util').isArray;
-
+var isArray = Array.isArray;
 
 /**
  * Expose `flash()` function on requests.
@@ -14,7 +13,7 @@ var isArray = require('util').isArray;
 module.exports = function flash(options) {
   options = options || {};
   var safe = (options.unsafe === undefined) ? true : !options.unsafe;
-  
+
   return function(req, res, next) {
     if (req.flash && safe) { return next(); }
     req.flash = _flash;