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Add Scratch to shortcode

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Fixes #2000
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Bjørn Erik Pedersen 2016-03-21 11:10:57 +01:00 committed by Steve Francia
parent 13707f68d2
commit 1ac0976469
1 changed files with 4 additions and 3 deletions
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content/extras/scratch.md
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`Scratch` -- a "scratchpad" for your node- or page-scoped variables. In most cases you can do well without `Scratch`, but there are some use cases that aren't solvable with Go's templates without `Scratch`'s help, due to scoping issues. `Scratch` -- a "scratchpad" for your node- or page-scoped variables. In most cases you can do well without `Scratch`, but there are some use cases that aren't solvable with Go's templates without `Scratch`'s help, due to scoping issues.
`Scratch` is added to both `Node` and `Page` and `Shortcode` -- with following methods:
`Scratch` is added to both `Node` and `Page` -- with following methods:
* `Set` and `Add` takes a `key` and the `value` to add. * `Set` and `Add` takes a `key` and the `value` to add.
* `Get` returns the `value` for the `key` given. * `Get` returns the `value` for the `key` given.
* `SetInMap` takes a `key`, `mapKey` and `value` * `SetInMap` takes a `key`, `mapKey` and `value`
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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 follwing adds will be appended to that list. For single values, `Add` accepts values that support Go's `+` operator. If the first `Add` for a key is an array or slice, the follwing adds will be appended to that list.
The scope of the backing data is global for the given `Node` or `Page`, and spans partial and shortcode includes. The scope of the backing data is global for the given `Node`, `Page` or `Shortcode`, and spans partial and shortcode includes.
Note that `.Scratch` from a shortcode will return the shortcode's `Scratch`, which in most casses is what you want. If you want to store it in the page scroped Scratch, then use `.Page.Scratch`.
## Sample usage ## Sample usage