Reference array from key in for loop with Twig

Question

In Twig I am trying to iterate over a potentially incomplete array using a fixed-length for loop so I can show what values are empty.

In PHP this would be simplified to:

for($i =0; $i <= $limit; $i++) {
    if($data[$i]) {
        echo $data[$i];
    }
)

The only thing is that in Twig I am having problems using the key (index) of the loop to reference a value in an array, this is what I've tried and expected to work, but doesn't:

{% for i in range(0, limit-1) %}
    {{ data.i }}
{% endfor %}

I could obviously use array_pad() to pad out my array in my controller, but surely there must be a way to do this in twig?

You could check this: stackoverflow.com/questions/6197499/twig-forgets-array-keys — OptimusCrime
– OptimusCrime, Commented Jan 17, 2012 at 11:50
When I do {{ data.i }}, it is looking for $data['i'], instead of parsing i as the index of the loop and looking for data.2. — Dunhamzzz
– Dunhamzzz, Commented Jan 17, 2012 at 13:44

Maerlyn · Accepted Answer · 2012-01-17 13:45:53Z

5

How about this:

{% for i in range(0, limit-1) %}
  {% if data[i] is defined %}
    {{ data[i] }}
  {% endif %}
{% endfor %}

answered Jan 17, 2012 at 13:45

Maerlyn

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1 Comment

Kris Wallsmith Over a year ago

You can use the .. operator to create a range {% for i in 0..limit-1 %}

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