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---
title: .Scratch
description: Acts as a "scratchpad" to allow for writable page- or shortcode-scoped variables.
godocref:
date: 2017-02-01
publishdate: 2017-02-01
lastmod: 2017-02-01
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keywords: [iteration]
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categories: [functions]
menu:
docs:
parent: "functions"
toc:
signature: []
workson: []
hugoversion:
relatedfuncs: []
deprecated: false
draft: false
aliases: [/extras/scratch/,/doc/scratch/]
---
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In most cases you can do okay without `Scratch`, but due to scoping issues, there are many use cases that aren't solvable in Go Templates without `Scratch`'s help.
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{{% note %}}
See [this Go issue](https://github.com/golang/go/issues/10608) for the main motivation behind Scratch.
{{% /note %}}
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{{% note %}}
For a detailed analysis of `.Scratch` and in context use cases, see this [post](https://regisphilibert.com/blog/2017/04/hugo-scratch-explained-variable/).
{{% /note %}}
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openbsd howto install 39808f50a Fix typo b55c0f3a0 Fix URL to hugotest 2fb157237 Release Hugo 0.43 e8af6a970 Merge branch 'temp43' 563dd4173 Adjust release notes 50aed2e52 releaser: Prepare repository for 0.44-DEV 363b363ff releaser: Add release notes to /docs for release of 0.43 93bfbef62 releaser: Bump versions for release of 0.43 893a27d33 Fix typos fe5908257 Celebrate: a few typo and grammar fixes bb20442df Merge commit '98293eaa1570b5aff4452021c8b6d6c8560b3f06' ef3d63936 Add a newScratch template func bf100a3cd Merge branch 'release-0.42.2' f1133c544 releaser: Prepare repository for 0.43-DEV 2ce058057 releaser: Add release notes to /docs for release of 0.42.2 6073927c6 releaser: Bump versions for release of 0.42.2 3bafddd52 releaser: Prepare repository for 0.43-DEV 8b9f805bd releaser: Add release notes to /docs for release of 0.42.1 efb6638ba releaser: Bump versions for release of 0.42.1 1e74ffbe0 releaser: Prepare repository for 0.43-DEV 2d2d0f8ab releaser: Add release notes to 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## Get a Scratch
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openbsd howto install 39808f50a Fix typo b55c0f3a0 Fix URL to hugotest 2fb157237 Release Hugo 0.43 e8af6a970 Merge branch 'temp43' 563dd4173 Adjust release notes 50aed2e52 releaser: Prepare repository for 0.44-DEV 363b363ff releaser: Add release notes to /docs for release of 0.43 93bfbef62 releaser: Bump versions for release of 0.43 893a27d33 Fix typos fe5908257 Celebrate: a few typo and grammar fixes bb20442df Merge commit '98293eaa1570b5aff4452021c8b6d6c8560b3f06' ef3d63936 Add a newScratch template func bf100a3cd Merge branch 'release-0.42.2' f1133c544 releaser: Prepare repository for 0.43-DEV 2ce058057 releaser: Add release notes to /docs for release of 0.42.2 6073927c6 releaser: Bump versions for release of 0.42.2 3bafddd52 releaser: Prepare repository for 0.43-DEV 8b9f805bd releaser: Add release notes to /docs for release of 0.42.1 efb6638ba releaser: Bump versions for release of 0.42.1 1e74ffbe0 releaser: Prepare repository for 0.43-DEV 2d2d0f8ab releaser: Add release notes to 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0.40.3 9af79e531 Merge commit '83bef6955e014d40c0f00db9cebe09113154e999' c4200dd0e Fix typo 8f8323336 releaser: Prepare repository for 0.41-DEV 9fab87505 releaser: Add release notes to /docs for release of 0.40.2 83648c666 releaser: Bump versions for release of 0.40.2 e6434d104 releaser: Prepare repository for 0.41-DEV 9389b2973 releaser: Add release notes to /docs for release of 0.40.1 32979e28a releaser: Bump versions for release of 0.40.1 196174a76 releaser: Prepare repository for 0.41-DEV 490a997bb releaser: Add release notes to /docs for release of 0.40 018aa6471 releaser: Bump versions for release of 0.40 92221934c Merge commit 'a215abf70e018f4bf40d6c09d8bd148d8684b33d' 0a58ef56e Merge commit 'd2ec1a06df8ab6b17ad05cb008d5701b40327d47' 312ab58c6 Improve .Get docs e43e8cee3 .Get function: fix syntax signature bb16150bc releaser: Prepare repository for 0.40-DEV 8cc80fed9 releaser: Add release notes to /docs for release of 0.39 f7aa0d1c5 releaser: Bump versions for release of 0.39 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From Hugo `0.43` you can also create a locally scoped `Scratch` by calling `newScratch`:
```go-html-template
$scratch := newScratch
$scratch.Set "greeting" "Hello"
```
A `Scratch` is also added to both `Page` and `Shortcode`. `Sratch` have the following methods:
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#### .Set
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Set the given value to a given key
```go-html-template
{{ .Scratch.Set "greeting" "Hello" }}
```
#### .Get
Get the value of a given key
```go-html-template
{{ .Scratch.Set "greeting" "Hello" }}
----
{{ .Scratch.Get "greeting" }} > Hello
```
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#### .Add
Will add a given value to existing value of the given key.
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For single values, `Add` accepts values that support Go's `+` operator. If the first `Add` for a key is an array or slice, the following adds will be appended to that list.
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```go-html-template
{{ .Scratch.Add "greetings" "Hello" }}
{{ .Scratch.Add "greetings" "Welcome" }}
----
{{ .Scratch.Get "greetings" }} > HelloWelcome
```
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```go-html-template
{{ .Scratch.Add "total" 3 }}
{{ .Scratch.Add "total" 7 }}
----
{{ .Scratch.Get "total" }} > 10
```
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```go-html-template
{{ .Scratch.Add "greetings" (slice "Hello") }}
{{ .Scratch.Add "greetings" (slice "Welcome" "Cheers") }}
----
{{ .Scratch.Get "greetings" }} > []interface {}{"Hello", "Welcome", "Cheers"}
```
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#### .SetInMap
Takes a `key`, `mapKey` and `value` and add a map of `mapKey` and `value` to the given `key`.
```go-html-template
{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}
----
{{ .Scratch.Get "greetings" }} > map[french:Bonjour english:Hello]
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```
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#### .GetSortedMapValues
Returns array of values from `key` sorted by `mapKey`
```go-html-template
{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}
----
{{ .Scratch.GetSortedMapValues "greetings" }} > [Hello Bonjour]
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```
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#### .Delete
Removes the given key
```go-html-template
{{ .Scratch.Delete "greetings" }}
```
## Scope
The scope of the backing data is global for the given `Page` or `Shortcode`, and spans partial and shortcode includes.
Note that `.Scratch` from a shortcode will return the shortcode's `Scratch`, which in most cases is what you want. If you want to store it in the page scoped Scratch, then use `.Page.Scratch`.
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[pagevars]: /variables/page/
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