Undefined variable: $ Laravel 5 - php

Question

This is the code from CategoriesController:
public function index()
{
$categories = Category::all();
return view('/home', compact('categories'));
}
And this is the code that I'm writing to the home.blade.php
#foreach($categories as $cat)
#endforeach
And then in home.blade.php
I'm getting this error: Undefined variable: categories
Why this happening ? Everything works fine with Articles but not categories and the code is the same.
Home.blade.php
#extends('app')
#section('content')
<div class="col-md-4 pull-right">
<div class="panel panel-primary">
<div class="panel-heading">
<h3 class="panel-title">Categories</h3>
</div>
<div class="panel-body">
#foreach($categories as $cat)
<div class="col-lg-6">
<ul class="list-unstyled">
<li>News
</li>
</ul>
</div>
#endforeach
</div>
</div>
</div>
#if(count($articles))
#foreach($articles as $article)
<div class="panel panel-default col-md-8">
<div class="panel-heading">
<h3>{{ $article->title }}</h3>
<small>posted by {{ $article->author->name }} {{ $article->created_at }}</small>
</div>
<div class="panel-body">
{!! str_limit($article->body, 1000) !!}
<hr>
Read More
</div>
</div>
#endforeach
#else
<h1>No articles at the moment.</h1>
#endif
<br>
{!! $articles->render() !!}
#stop

Answer 1

You have two routes
Route::get('/home', 'ArticlesController#index');
Route::get('/home', 'CategoriesController#index');
Which means when you visit /home, only ArticlesController#index is fired, not both.
This means that the $categories variable used in the view is not populated because your index() method in CategoriesController is intended to do this but is never called.
Therefore you need to do something like this
Route::get('/home', 'HomeController#index');
public function index()
{
$categories = Category::all();
$articles = Article::all();
return view('/home', compact('articles', 'categories'));
}

Answer 2

try to use
return View::make('/home')->with(compact('categories'));
instead of
return view('/home', compact('categories'));

Answer 3

I insert this in the top of my #foreach
<?php
use App\models\PersonalContact;
$data = PersonalContact::all();
?>
or this before #foreach add #if statement like this
#if (count($data) > 0)
#foreach ($data as $bloginfo)
<tr role="row" class="odd">
<td class="sorting_1">{{$bloginfo->name}}</td>
<td>{{$bloginfo->description}}</td>
<td>{{$bloginfo->email}}</td>
<td>{{$bloginfo->phone}}</td>
<td><img src="{{url('images/'.$bloginfo->image)}}" alt="" width="100px" height="100px"></td>
<td><i class="fas fa-edit"></i>Add | <i class="fas fa-edit"></i>Edit | <a class="btn btn-app"><i class="fas fa-edit"></i>Delete</a></td>
</tr>
#endforeach
#endif

Answer 4

return view('/home', compact('categories'));
The problem was $categories on compact method, you must use like a string