> For the complete documentation index, see [llms.txt](https://docs.rewst.help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rewst.help/documentation/automations/actions-in-rewst/transform-actions/flatten-list-transform-action.md).

# Flatten list transform action

## Use case

You are working with a list of users, however the users are nested in a list.

You would like to flatten the list of lists so it ends up as a list of objects.

## Overview

Flatten a nested List.

## Parameters

<table><thead><tr><th width="217">Parameter</th><th width="417.3333333333333">Description</th><th data-type="checkbox">Required</th></tr></thead><tbody><tr><td>Array variable to flatten</td><td>The array you would like to flatten</td><td>true</td></tr></tbody></table>

## Usage

<details>

<summary>Example: Flattening nested lists</summary>

Input:

**Array variable to flatten:**

```json
[
    [
        {
            "user": "Dan"
        }
    ]
],
[
    [
        {
            "user": "Bob"
        }
    ]
],
[
    [
        {
            "user": "Sheryl"
        }
    ]
],
[
    [
        {
            "user": "Sarah"
        }
    ]
],
[
    [
        {
            "user": "Sean"
        }
    ]
]
```

</details>

## Results output

Result of Example:

```json
[
  {
    "user": "Dan"
  },
  {
    "user": "Bob"
  },
  {
    "user": "Sheryl"
  },
  {
    "user": "Sarah"
  },
  {
    "user": "Sean"
  }
][
  {
    "user": "Dan"
  },
  {
    "user": "Bob"
  },
  {
    "user": "Sheryl"
  },
  {
    "user": "Sarah"
  },
  {
    "user": "Sean"
  }
]
```


---

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