> For the complete documentation index, see [llms.txt](https://learn.mechanic.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.mechanic.dev/platform/liquid/keyword-literals/hash.md).

# hash

The `hash` keyword literal may be used in any Liquid code to instantiate a [hash](/platform/liquid/basics/types.md#hash).

Hashes support [assignment by key](/platform/liquid/tags/assign.md#assigning-into-arrays). The [keys](/platform/liquid/filters.md#keys) and [values](/platform/liquid/filters.md#values) filters may be used to quickly access an array of hash keys or values, respectively.

{% hint style="info" %}
The term "hash" comes from Ruby. In Ruby ([docs](https://ruby-doc.org/core-2.5.1/Hash.html)), "A Hash is a dictionary-like collection of unique keys and their values."

In Mechanic's Liquid implementation, a hash can only have string keys.
{% endhint %}

## Example

```liquid
{% assign sizes = hash %}
{% assign sizes["S"] = "Small" %}
{% assign sizes["M"] = "Medium" %}
{% assign sizes["L"] = "Large" %}

{% assign size_abbreviations = sizes | keys %}
{% assign size_labels = sizes | values %}

{% for keyval in sizes %}
  {% assign size_abbreviation = keyval[0] %}
  {% assign size_label = keyval[1] %}

  {{ size_abbreviation }}: {{ size_label }}
{% endfor %}
```


---

# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://learn.mechanic.dev/platform/liquid/keyword-literals/hash.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.