A filter to compute modulus/remainder?

[cboettig]

Liquid has been a fantastic library with very useful filters. One that I keep feeling that lack of is a modulus/remainder operator, which comes in real handy when computing row/column positions for where to stick certain elements on a grid.

For instance, I often have an array of content, maybe it's site.posts on a jekyll site, and I want to organize them into a twitter-bootstrap style grid.

This is easy to specify column-wise in liquid, since you have integer division

{% capture n  %}{{ site.posts | size | divided_by:3}}{% endcapture %}
{% capture m %} {{ n | times:2 }}{% endcapture %}

<div class="span3">
{% for post in site.posts limit:n %}
{{ post | content }}
{% endfor %}
</div>

<div class="span3">
{% for post in site.posts limit:n offset:n%}
{{ post | content }}
{% endfor %}
</div>

<div class="span3">
{% for post in site.posts limit:n offset:m %}
{{ post | content }}
{% endfor %}
</div>

But if I'd rather fill out posts going across rows instead of down columns I need to do get the remainder of index/3, not the integer divisor. Think you might consider adding support for such a filter? (guess I should learn to extend my own filters too...)

[titanous]

This was implemented in c4d713b6bbb1a61f65583de32112756200231d5e.

[cboettig]

Brilliant, thanks. I'll add it to the wiki. Is there an automated list of all filters available in the documentation somewhere? Perhaps I shouldn't be relying on the wiki to know what's implemented...