52 lines
890 B
Markdown
52 lines
890 B
Markdown
---
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title: regexp.matchRegexpString() function
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description: >
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The `regexp.matchRegexpString()` function tests if a string contains any match
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to a regular expression.
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menu:
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v2_0_ref:
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name: regexp.matchRegexpString
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parent: Regular expressions
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weight: 301
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---
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The `regexp.matchRegexpString()` function tests if a string contains any match
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to a regular expression.
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_**Output data type:** Boolean_
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```js
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import "regexp"
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regexp.matchRegexpString(r: /(gopher){2}/, v: "gophergophergopher")
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// Returns true
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```
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## Parameters
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### r
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The regular expression used to search `v`.
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_**Data type:** Regexp_
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### v
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The string value to search.
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_**Data type:** String_
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## Examples
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###### Filter by columns that contain matches to a regular expression
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```js
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import "regexp"
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data
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|> filter(fn: (r) =>
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regexp.matchRegexpString(
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r: /Alert\:/,
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v: r.message
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)
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)
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```
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