How to determine the number of results in the autocomplete using jQuery

This code determines the number of results of suggestions for input

 source: function(request, response) {
        var results = $.ui.autocomplete.filter(availableTags, request.term);        
        response(results.slice(0, 6));
    }

6 it's its the max-number of results in suggestion list

 <!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Autocomplete - Default functionality</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
  <script>
  $( function() {
    var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++",
      "Clojure",
      "COBOL",
      "ColdFusion",
      "Erlang",
      "Fortran",
      "Groovy",
      "Haskell",
      "Java",
      "JavaScript",
      "Lisp",
      "Perl",
      "PHP",
      "Python",
      "Ruby",
      "Scala",
      "Scheme"
    ];
    $( "#tags" ).autocomplete({
      source: function(request, response) {
        var results = $.ui.autocomplete.filter(availableTags, request.term);        
        response(results.slice(0, 6));
    }
    });
  } );
  </script>
</head>
<body>
 
<div class="ui-widget">
  <label for="tags">Tags: </label>
  <input id="tags">
</div>
 
 
</body>
</html>

How to determine the number of results in the autocomplete using jQuery

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How to determine the number of results in the autocomplete using jQuery

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How to determine the number of results in the autocomplete using jQuery

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