Twig: while-workaround

Question

I've already a solution, but just for JavaScript. Unfortunately while-loops do not exist in Twig.

My Twig-target in JavaScript:

var x = 10; // this is an unknown number
var result = x;
while (100 % result !== 0) {
   result++;
}
console.log(result);

Any ideas how I do this in Twig?

What's my target: (not important if you already understood)

I want to get the first number after my unknown number, that satisfy the following condition:

100 divided by (the first number) equals a whole number as result.

EDIT: I have no access to PHP nor Twig-core.

Answer 1

You can make a Twig extension like:

namespace Acme\DemoBundle\Twig\Extension;

class NumberExtension extends \Twig_Extension
{

    public function nextNumber($x)
    {
        $result = $x;
        while (100 % $result !== 0) {
            $result++;
        }
        return $result;
    }

    public function getFunctions()
    {
        return array(
            'nextNumber' => new \Twig_Function_Method($this, 'nextNumber')
        );
    }

    /**
     * Returns the name of the extension.
     *
     * @return string The extension name
     */
    public function getName()
    {
        return 'demo_number';
    }
}

And define it in the service.xml of the bundle:

<service id="twig.extension.acme.demo" class="Acme\DemoBundle\Twig\Extension\NumberExtension">
    <tag name="twig.extension" />
</service>

Then use it in the template:

{{ nextNumber(10) }}

UPDATE

A (not so great) approach but that possibly satisfy your needed is to do something like this:

{% set number = 10 %}
{% set max = number + 10000 %} {# if you can define a limit #}
{% set result = -1 %}
    {% for i in number..max %}
        {% if 100 % i == 0 and result < 0 %} {# the exit condition #}
            {% set result = i %}
        {% endif %}
    {% endfor %}

<h1>{{ result }}</h1>

Hope this helps