Angular2 removing duplicates from an JSON array
<p>I have a problem with filter in my JSON array when I move my app to Angular2 . In Angular 1.x that was easier. I used <code>'unique'</code> in filter and this remove all duplicates.</p>

<p>apps:</p>

<pre><code>{"app":"database_1",
 "host":"my_host1",
 "ip":"00.000.00.000"
},
{"app":"database_1",
 "host":"my_host1",
 "ip":"00.000.00.000"
},
{"app":"database_2",
 "host":"my_host2",
 "ip":"00.000.00.000"
},
{"app":"database_2",
 "host":"my_host2",
 "ip":"00.000.00.000"
}
</code></pre>

<p>Part of html code:</p>

<pre><code>    &lt;div *ngFor='#appsUnique of apps '&gt;
        &lt;div class="row dashboard-row"&gt;
            &lt;div class="col-md-2"&gt;
               &lt;h4&gt;{{appsUnique.app }}&lt;/h4&gt;
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;
</code></pre>

<p>And result is: </p>

<pre><code>database_1
database_1
database_2
database_2
</code></pre>

<p>I want to get result:</p>

<pre><code>database_1
database_2
</code></pre>

<p>How can I remove duplicates from an array?</p>