collections.NewScratch
文法
collections.NewScratch
戻り値
maps.Scratch
エイリアス
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.
Methods
Set
Sets the value of a given key.
{{ $s := newScratch }}
{{ $s.Set "greeting" "Hello" }}
Get
Gets the value of a given key.
{{ $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.
{{ $s := newScratch }}
{{ $s.Set "greeting" "Hello" }}
{{ $s.Add "greeting" "Welcome" }}
{{ $s.Get "greeting" }} → HelloWelcome
{{ $s := newScratch }}
{{ $s.Set "total" 3 }}
{{ $s.Add "total" 7 }}
{{ $s.Get "total" }} → 10
{{ $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.
{{ $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.
{{ $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.
{{ $s := newScratch }}
{{ $s.SetInMap "greetings" "english" "Hello" }}
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
{{ $s.GetSortedMapValues "greetings" }} → [Hello Bonjour]
Delete
Removes the given key.
{{ $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.
{{ $s := newScratch }}
{{ $s.SetInMap "greetings" "english" "Hello" }}
{{ $s.SetInMap "greetings" "french" "Bonjour" }}
{{ $map := $s.Values }}