mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
34 lines
1.4 KiB
Markdown
34 lines
1.4 KiB
Markdown
---
|
|
title: replaceRE
|
|
description: Replaces all occurrences of a regular expression with the replacement pattern.
|
|
date: 2017-02-01
|
|
publishdate: 2017-02-01
|
|
lastmod: 2020-09-07
|
|
categories: [functions]
|
|
menu:
|
|
docs:
|
|
parent: "functions"
|
|
keywords: [regex]
|
|
signature: ["strings.ReplaceRE PATTERN REPLACEMENT INPUT [LIMIT]", "replaceRE PATTERN REPLACEMENT INPUT [LIMIT]"]
|
|
workson: []
|
|
hugoversion:
|
|
relatedfuncs: []
|
|
deprecated: false
|
|
aliases: []
|
|
---
|
|
|
|
`strings.ReplaceRE` returns a copy of `INPUT`, replacing all matches of the regular
|
|
expression `PATTERN` with the replacement text `REPLACEMENT`.
|
|
The number of replacements can be limited with an optional `LIMIT` parameter.
|
|
|
|
```
|
|
{{ replaceRE "^https?://([^/]+).*" "$1" "http://gohugo.io/docs" }}` → "gohugo.io"
|
|
{{ "http://gohugo.io/docs" | replaceRE "^https?://([^/]+).*" "$1" }}` → "gohugo.io"
|
|
{{ replaceRE "a+b" "X" "aabbaabbab" 1 }} → "Xbaabbab"
|
|
```
|
|
|
|
{{% note %}}
|
|
Hugo uses Go's [Regular Expression package](https://golang.org/pkg/regexp/), which is the same general syntax used by Perl, Python, and other languages but with a few minor differences for those coming from a background in PCRE. For a full syntax listing, see the [GitHub wiki for re2](https://github.com/google/re2/wiki/Syntax).
|
|
|
|
If you are just learning RegEx, or at least Go's flavor, you can practice pattern matching in the browser at <https://regex101.com/>.
|
|
{{% /note %}}
|