# Add all elements from a for loop to an array

**URL:** <https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005>\
**Category:** Help\
**Created:** [February 19, 2022, 12:24am UTC](https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005 "2022-02-19T00:24:03Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![BillRaymond](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/billraymond/32/5963_2.png) [@BillRaymond](https://talk.jekyllrb.com/u/BillRaymond)\
**Post date:** [February 19, 2022, 12:24am UTC](https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005/1 "2022-02-19T00:24:03Z")

</div>

I need to get an array of future posts and combine that with the latest post.

Here is my code to get future posts:

```auto
{%- assign futurePosts = site.posts | where_exp: 'post', 'post.date >= site.time' -%}

```

Now here is the problem, I **cannot** do this to get the latest post:

```auto
{%- assign latestPost = site.posts | limit: 1 -%}

```

Instead, I have to get the latest post this way:

```auto
{%- assign posts = site.posts -%}
    {%- for post in validPosts limit: 1 -%}
      ....[code]....
    {%- endfor -%}

```

Ideally, I would like to take the `post` and concatenate that into the `futurePosts` array, but `post` is now a variable. I know I could manually select the items in `post` and add them to the `futurePosts` array, but then that manual effort will mean if my YAML front matter ever changes, I need to update the code.

Is there a way to get the latest post and concatenate that to another array of posts?

Thanks!

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<div class="post-metadata">

**Author:** ![rdyar](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/rdyar/32/710_2.png) [@rdyar](https://talk.jekyllrb.com/u/rdyar)\
**Post date:** [February 19, 2022, 6:11pm UTC](https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005/2 "2022-02-19T18:11:25Z")

</div>

> [@BillRaymond](#):
>
> but `post` is now a variable

not sure I understand this - but just to make sure - if you are saying `for POST in validposts..` - you could change that to item instead of post - or it could be anything. Pretty sure you know that, just making sure.

---

<div class="post-metadata">

**Author:** ![jhogue](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/jhogue/32/1815_2.png) [@jhogue](https://talk.jekyllrb.com/u/jhogue)\
**Post date:** [February 20, 2022, 12:10am UTC](https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005/3 "2022-02-20T00:10:52Z")

</div>

You can concatenate in a few ways. I think this may help as I am doing something similar on my site. I have an array of property posts, and want to find the ones that are a certain category and have been updated (have a value in the update front matter) in the past month. I capture a string of HTML as I go through the loop so I can count it all at the end and use that for a CSS class.

Maybe an idea in here can help you out. The concatenation happens in the `{% capture construct_html %}` part, where I include whatever value `{{ construct_html }}` had previously and add the new output.

```auto
{%- assign construction = site.property | where: "categories", "#WhatAreTheyBuilding" | sort: "date-modified" | reverse -%}
{%- assign lastmonth = "now" | date: '%s' | minus: 2592000 | date: '%Y%m%d' | times:1 -%}
{%- assign construct_count = 0 -%}
{%- assign construct_html = '' -%}
{%- for item in construction -%}
  {% assign itemdate = item.date-modified | date: '%Y%m%d' | times:1 %}
  {% if itemdate > lastmonth %}
    {% if item.update %}
    {% else %}
      {% capture construct_html %}
        {{ construct_html }}
        {% include property-card.html %}
      {% endcapture %}
      {% assign construct_count = construct_count | plus: 1 %}
    {% endif %}
  {% endif %}
{%- endfor -%}
  <h2 class="o__title--sm v-rhythm">#WhatAreTheyBuilding: Under Construction</h2>
  <ul class="taxonomy __list taxonomy__ list--vertical taxonomy __list--vertical--{{ construct_count }} u__ list __unstyled u__ vertical__pb" role="list">
    {{ construct_html }}
  </ul>

```

---

<div class="post-metadata">

**Author:** ![BillRaymond](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/billraymond/32/5963_2.png) [@BillRaymond](https://talk.jekyllrb.com/u/BillRaymond)\
**Post date:** [February 23, 2022, 7:22pm UTC](https://talk.jekyllrb.com/t/add-all-elements-from-a-for-loop-to-an-array/7005/4 "2022-02-23T19:22:34Z")

</div>

@jhogue, thank you for the idea! I think this became too complex a solution, so here is how I ultimately resolved the problem.

I create two `for` loops to get the data I want to work with and then use the same business logic for each by using an `include` file. Here are the two items you might see on my page:

To work with future posts:

```auto
{%- assign posts = site.posts | where_exp: 'post', 'post.date > site.time' -%}
{%- for post in posts -%}
  {%- include my-liquid-business-logic.html -%}
{%- endfor -%}

```

To work with the current latest post:

```auto
{%- assign posts = site.posts | where_exp: 'post', 'post.date < site.time' -%}
{%- for post in posts limit: 1 offset: 0-%}
  {%- include my-liquid-business-logic.html -%}
{%- endfor -%}

```

Ideally, Jekyll offers the ability to get the latest post into an array by providing the `limit` and `offset` within `assign`, but at least this method works and is less troublesome than trying to fill an array with a “non-array” 🙂

Thanks again!