title: Vuetify custom filter
body: <p>Hello I need a custom filter for my table but I don't know how to do it.</p>
  <p>I have currently the following code which works kinda:</p>
  <pre><code>    customFilter(value, search) {
            return (
              value != null &amp;&amp;
              search != null &amp;&amp;
              typeof value === &quot;string&quot; &amp;&amp;
              value.toString().toLocaleLowerCase().indexOf(search) !== -1
            );
      }
  </code></pre>
  <p>but I need to go through an array with one object, too: You can see my data structure here:</p>
  <pre><code>      invoiceID: &quot;&quot;,
        client: [
          {
            _id: &quot;&quot;,
            salutation: &quot;&quot;,
            companyname: &quot;&quot;,
            firstname: &quot;&quot;,
            lastname: &quot;&quot;,
            street: &quot;&quot;,
            housenumber: &quot;&quot;,
            zipCode: &quot;&quot;,
            place: &quot;&quot;,
          },
        ],
        buildingProject: &quot;&quot;,
        place: &quot;&quot;,
        servicetext: &quot;&quot;,
        paid: &quot;&quot;,
        transferred: 0,
  </code></pre>
  <p>I can search for anything except in client. The client array will always be one size big. The function needs to return a boolean.</p>