title: How to pass an Array as element's Attribute?
body: <p>I'm developing for sending an Array as element's attribute.</p>
  
  <p>File form-list.html
  <div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>&lt;dom-module id="form-list"&gt;
    &lt;template&gt;
      &lt;div&gt;{{title}} - {{owner}} &lt;/div&gt;
      &lt;form&gt;
        &lt;template is="dom-repeat" items="{{inputAndLabel}}"&gt;
            &lt;div&gt;&lt;label&gt;{{item.tag}} {{owner}}&lt;/label&gt;&lt;input type="{{item.type}}" value="{{item.defaultValue}}"&gt;&lt;/div&gt;
        &lt;/template&gt;
      &lt;/form&gt;
    &lt;/template&gt;
  
    &lt;script&gt;
      Polymer({
        is: 'form-list',
        properties: {
          owner: {
            value:"Mechanical",
          },
          inputAndLabel: {
            type: Array,
            value: function() { return []; }
          }
        },
        ready: function() {
          this.title = 'Formulario: Usuario';
        }
      });
    &lt;/script&gt;
  &lt;/dom-module&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>So, for using the element and pass the inputAndLabel propertie (it's an Array) that is not work, but the owner property works (it's a string).</p>
  
  <pre><code>&lt;form-list inputAndLabel="[
          {defaultValue: '', type:'text', tag: 'Nombre' },
          {defaultValue: '', type:'text', tag: 'Apellido' },
          {defaultValue: '', type:'text', tag: 'Email' },
          {defaultValue: '', type:'text', tag: 'Dirección' }]" owner="Eternal"&gt;
  &lt;/form-list&gt;
  </code></pre>
  
  <p>How to send an array as custom element's property?</p>
  
  <p>Thanks</p>