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---
title: merge
description: "`merge` deep merges two maps and returns the resulting map."
date: 2019-08-08
categories: [functions]
menu:
docs:
parent: "functions"
keywords: [dictionary]
signature: ["$params := merge $default_params $user_params"]
workson: []
hugoversion: "0.56.0"
relatedfuncs: [dict, append, reflect.IsMap, reflect.IsSlice]
aliases: []
---
An example merging two maps.
```go-html-template
{{ $default_params := dict "color" "blue" "width" "50%" "height" "25%" }}
{{ $user_params := dict "color" "red" "extra" (dict "duration" 2) }}
{{ $params := merge $default_params $user_params }}
```
Resulting __$params__:
```
"color": "red"
"extra":
"duration": 2
"height": "25%"
"icon": "mail"
"width": "50%"
```
{{% note %}}
Regardless of depth, merging only applies to maps. For slices, use [append]({{< ref "functions/append" >}})
{{% /note %}}
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