Twig创建rowspan on循环

<table>
    <tr>
        <th>Name</th>
        <th>Age</th>
    </tr>
    {% set previousName = '' %}
    {% set rowspan = 1 %}
    {% for person in people %}
        {% if person.name == previousName %}
            {% set rowspan = rowspan + 1 %}
        {% else %}
            {% if loop.index > 1 %}
                <tr>
                    <td rowspan="{{ rowspan }}">{{ previousName }}</td>
                    <td>{{ previousAge }}</td>
                </tr>
            {% endif %}
            {% set previousName = person.name %}
            {% set previousAge = person.age %}
            {% set rowspan = 1 %}
        {% endif %}
    {% endfor %}
    {# 输出最后一行 #}
    <tr>
        <td rowspan="{{ rowspan }}">{{ previousName }}</td>
        <td>{{ previousAge }}</td>
    </tr>
</table>