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53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
---
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title: first
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linktitle: first
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description: "Slices an array to only the first _N_ elements."
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date: 2017-02-01
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publishdate: 2017-02-01
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lastmod: 2017-02-01
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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: [iteration]
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signature: ["first LIMIT COLLECTION"]
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workson: [lists,taxonomies,terms,groups]
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hugoversion:
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relatedfuncs: [after,last]
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deprecated: false
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aliases: []
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---
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`first` works in a similar manner to the [`limit` keyword in
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SQL][limitkeyword]. It reduces the array to only the `first N`
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elements. It takes the array and number of elements as input.
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`first` takes two arguments:
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1. `number of elements`
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2. `array` *or* `slice of maps or structs`
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{{< code file="layout/_default/section.html" >}}
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{{ range first 10 .Pages }}
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{{ .Render "summary" }}
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{{ end }}
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{{< /code >}}
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*Note: Exclusive to `first`, LIMIT can be '0' to return an empty array.*
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## `first` and `where` Together
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Using `first` and [`where`][wherefunction] together can be very
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powerful. Below snippet gets a list of posts only from [**main
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sections**][mainsections], sorts it by the `title` parameter, and then
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ranges through only the first 5 posts in that list:
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{{< code file="first-and-where-together.html" >}}
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{{ range first 5 (where site.RegularPages "Type" "in" site.Params.mainSections).ByTitle }}
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{{ .Content }}
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{{ end }}
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{{< /code >}}
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[limitkeyword]: https://www.techonthenet.com/sql/select_limit.php
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[wherefunction]: /functions/where/
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[mainsections]: /functions/where/#mainsections
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