如何使用 Twig 将数据平均呈现为 3 列列表? [英] How to render data equally into 3 column list using Twig?

问题描述

我有包含城市的数组，我想将它们放在 3 列列表中.如何呈现城市数组，将它们平均分成 3 列列表?

我的 html 列表:

 
<ul><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li>...
<div class="col-md-4"><ul><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li>...

<div class="col-md-4"><ul><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li><li class="city-item"><a href="#">City</a></li>...

我希望数据按此顺序出现

city0 city3 city6城市1 城市4 城市7城市 2 城市 5

呈现类似数据的最佳方法是什么?

解决方案

更新 1:我创建了一个 Twig Fiddle 来在评论中加入建议.http://twigfiddle.com/0h54xy

更新 2:如果您有更新版本的 Twig，最好使用 batch 过滤器.有关示例，请参见 http://twigfiddle.com/0h54xy/5.

<小时>

这就是模运算符 % 非常有用的地方.

Twig 中的 // 运算符将一个数字进行除法和取整，即 20//3 == 2

注意 Twig 的 loop.index 不是零索引的，第一个值是 1.

{% if city|length %}{% 设置城市每列 = (城市|长度/3)|圆形(0, 'ceil') %}{% for city in city %}{% if cityPerColumn == 1 or loop.index % cityPerColumn == 1 %}<div class="col-md-4"><ul>{％ 万一 ％}<li class="city-item"><a href="#">{{ city }}</a></li>{% if loop.last 或 loop.index % cityPerColumn == 0 %}

{％ 万一 ％}{% 结束为 %}{％ 万一 ％}

I have array contains cities and I would like to put them on the 3 column list. How can I render an array of cities spliting them equally into 3 column list?

My html list:

                    <div class="col-md-4">  
                        <ul>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            ...
                        </ul>
                    </div>
                    <div class="col-md-4">  
                        <ul>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            ...
                        </ul>
                    </div>
                    <div class="col-md-4">  
                        <ul>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            <li class="city-item"><a href="#">City</a></li>
                            ...
                        </ul>
                    </div>

I am expecting the data to appear in this order

city0   city3   city6
city1   city4   city7
city2   city5

What's the best approach to render data like it?

解决方案

Update 1: I have created a Twig Fiddle to incorporate suggestions in the comments. http://twigfiddle.com/0h54xy

Update 2: If you have a newer version of Twig, it might be better to use the batch filter. See http://twigfiddle.com/0h54xy/5 for an example.

---

This is where the modulus operator % is very useful.

The // operator in Twig will divide a number and floor it, i.e. 20 // 3 == 2

Note that Twig's loop.index is not zero-indexed, the first value is 1.

{% if cities|length  %}
    {% set citiesPerColumn = (cities|length / 3)|round(0, 'ceil') %}

    {% for city in cities %}

        {% if citiesPerColumn == 1 or loop.index % citiesPerColumn == 1 %}
            <div class="col-md-4">
                <ul>
        {% endif %}

                    <li class="city-item"><a href="#">{{ city }}</a></li>

        {% if loop.last or loop.index % citiesPerColumn == 0 %}
                </ul>
            </div>
        {% endif %}

    {% endfor %}
{% endif %}

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