mirror of https://github.com/gohugoio/hugo
39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
---
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title: strings.ReplaceRE
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description: Returns a copy of INPUT, replacing all occurrences of a regular expression with a replacement pattern.
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categories: []
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keywords: []
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params:
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functions_and_methods:
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aliases: [replaceRE]
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returnType: string
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signatures: ['strings.ReplaceRE PATTERN REPLACEMENT INPUT [LIMIT]']
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aliases: [/functions/replacere]
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---
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{{% include "/_common/functions/regular-expressions.md" %}}
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```go-html-template
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{{ $s := "a-b--c---d" }}
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{{ replaceRE `(-{2,})` "-" $s }} → a-b-c-d
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```
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Limit the number of replacements using the LIMIT argument:
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```go-html-template
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{{ $s := "a-b--c---d" }}
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{{ replaceRE `(-{2,})` "-" $s 1 }} → a-b-c---d
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```
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Use `$1`, `$2`, etc. within the replacement string to insert the content of each capturing group within the regular expression:
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```go-html-template
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{{ $s := "http://gohugo.io/docs" }}
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{{ replaceRE "^https?://([^/]+).*" "$1" $s }} → gohugo.io
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```
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> [!note]
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> You can write and test your regular expression using [regex101.com]. Be sure to select the Go flavor before you begin.
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[regex101.com]: https://regex101.com/
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