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29 lines
893 B
Markdown
29 lines
893 B
Markdown
---
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title: "complement"
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description: "`collections.Complement` (alias `complement`) gives the elements of a collection that are not in any of the others."
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date: 2018-11-07
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categories: [functions]
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menu:
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docs:
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parent: "functions"
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keywords: [collections,intersect,union]
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signature: ["COLLECTION | complement COLLECTION [COLLECTION]..." ]
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hugoversion: "0.51"
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aliases: []
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---
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Example:
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```go-html-template
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{{ $pages := site.RegularPages | first 50 }}
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{{ $news := where $pages "Type" "news" | first 5 }}
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{{ $blog := where $pages "Type" "blog" | first 5 }}
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{{ $other := $pages | complement $news $blog | first 10 }}
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```
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The above is an imaginary use case for the home page where you want to display different page listings in sections/boxes on different places on the page: 5 from `news`, 5 from the `blog` and then 10 of the pages not shown in the other listings, to _complement_ them.
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