mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-01 19:43:05 -05:00
5fd1e74903
``` git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash ``` Closes #11925
124 lines
3 KiB
Markdown
124 lines
3 KiB
Markdown
---
|
|
title: collections.NewScratch
|
|
description: Returns a locally scoped "scratch pad" to store and manipulate data.
|
|
categories: []
|
|
keywords: []
|
|
action:
|
|
aliases: [newScratch]
|
|
related:
|
|
- methods/page/scratch
|
|
- methods/page/store
|
|
- methods/shortcode/scratch
|
|
returnType: maps.Scratch
|
|
signatures: [collections.NewScratch ]
|
|
---
|
|
|
|
The `collections.NewScratch` function creates a locally scoped [scratch pad] to store and manipulate data. To create a scratch pad that is attached to a `Page` object, use the [`Scratch`] or [`Store`] method.
|
|
|
|
[`Scratch`]: /methods/page/scratch
|
|
[`Store`]: /methods/page/store
|
|
[scratch pad]: /getting-started/glossary/#scratch-pad
|
|
|
|
## Methods
|
|
|
|
###### Set
|
|
|
|
Sets the value of a given key.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "greeting" "Hello" }}
|
|
```
|
|
|
|
###### Get
|
|
|
|
Gets the value of a given key.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "greeting" "Hello" }}
|
|
{{ $s.Get "greeting" }} → Hello
|
|
```
|
|
|
|
###### Add
|
|
|
|
Adds a given value to existing value(s) of the given key.
|
|
|
|
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.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "greeting" "Hello" }}
|
|
{{ $s.Add "greeting" "Welcome" }}
|
|
{{ $s.Get "greeting" }} → HelloWelcome
|
|
```
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "total" 3 }}
|
|
{{ $s.Add "total" 7 }}
|
|
{{ $s.Get "total" }} → 10
|
|
```
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "greetings" (slice "Hello") }}
|
|
{{ $s.Add "greetings" (slice "Welcome" "Cheers") }}
|
|
{{ $s.Get "greetings" }} → [Hello Welcome Cheers]
|
|
```
|
|
|
|
###### SetInMap
|
|
|
|
Takes a `key`, `mapKey` and `value` and adds a map of `mapKey` and `value` to the given `key`.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.SetInMap "greetings" "english" "Hello" }}
|
|
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
|
|
{{ $s.Get "greetings" }} → map[english:Hello french:Bonjour]
|
|
```
|
|
|
|
###### DeleteInMap
|
|
|
|
Takes a `key` and `mapKey` and removes the map of `mapKey` from the given `key`.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.SetInMap "greetings" "english" "Hello" }}
|
|
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
|
|
{{ $s.DeleteInMap "greetings" "english" }}
|
|
{{ $s.Get "greetings" }} → map[french:Bonjour]
|
|
```
|
|
|
|
###### GetSortedMapValues
|
|
|
|
Returns an array of values from `key` sorted by `mapKey`.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.SetInMap "greetings" "english" "Hello" }}
|
|
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
|
|
{{ $s.GetSortedMapValues "greetings" }} → [Hello Bonjour]
|
|
```
|
|
|
|
###### Delete
|
|
|
|
Removes the given key.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.Set "greeting" "Hello" }}
|
|
{{ $s.Delete "greeting" }}
|
|
```
|
|
|
|
###### Values
|
|
|
|
Returns the raw backing map. Do not use with `Scratch` or `Store` methods on a `Page` object due to concurrency issues.
|
|
|
|
```go-html-template
|
|
{{ $s := newScratch }}
|
|
{{ $s.SetInMap "greetings" "english" "Hello" }}
|
|
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
|
|
|
|
{{ $map := $s.Values }}
|
|
```
|