---
title: regexp.replaceAllString() function
description: regexp.replaceAllString() replaces all reguar expression matches in a string with a specified replacement.
url: https://docs.influxdata.com/flux/v0/stdlib/regexp/replaceallstring/
estimated_tokens: 1708
product: Flux
version: v0
---

# regexp.replaceAllString() function

-   Flux 0.33.0+
-   View InfluxDB support

`regexp.replaceAllString()` replaces all reguar expression matches in a string with a specified replacement.

##### Function type signature

```js
(r: regexp, t: string, v: string) => string
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### r

(Required) Regular expression used to search `v`.

### v

(Required) String value to search.

### t

(Required) Replacement for matches to `r`.

## Examples

-   [Replace regular expression matches in a string](#replace-regular-expression-matches-in-a-string)
-   [Replace regular expression matches in string column values](#replace-regular-expression-matches-in-string-column-values)

### Replace regular expression matches in a string

```js
import "regexp"

regexp.replaceAllString(r: /a(x*)b/, v: "-ab-axxb-", t: "T")// Returns "-T-T-"

```

### Replace regular expression matches in string column values

```js
import "regexp"
import "sampledata"

sampledata.string()
    |> map(fn: (r) => ({r with _value: regexp.replaceAllString(r: /smpl_/, v: r._value, t: "")}))
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t1 | smpl_g9qczs |
| 2021-01-01T00:00:10Z | t1 | smpl_0mgv9n |
| 2021-01-01T00:00:20Z | t1 | smpl_phw664 |
| 2021-01-01T00:00:30Z | t1 | smpl_guvzy4 |
| 2021-01-01T00:00:40Z | t1 | smpl_5v3cce |
| 2021-01-01T00:00:50Z | t1 | smpl_s9fmgy |

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t2 | smpl_b5eida |
| 2021-01-01T00:00:10Z | t2 | smpl_eu4oxp |
| 2021-01-01T00:00:20Z | t2 | smpl_5g7tz4 |
| 2021-01-01T00:00:30Z | t2 | smpl_sox1ut |
| 2021-01-01T00:00:40Z | t2 | smpl_wfm757 |
| 2021-01-01T00:00:50Z | t2 | smpl_dtn2bv |

#### Output data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | g9qczs | t1 |
| 2021-01-01T00:00:10Z | 0mgv9n | t1 |
| 2021-01-01T00:00:20Z | phw664 | t1 |
| 2021-01-01T00:00:30Z | guvzy4 | t1 |
| 2021-01-01T00:00:40Z | 5v3cce | t1 |
| 2021-01-01T00:00:50Z | s9fmgy | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | b5eida | t2 |
| 2021-01-01T00:00:10Z | eu4oxp | t2 |
| 2021-01-01T00:00:20Z | 5g7tz4 | t2 |
| 2021-01-01T00:00:30Z | sox1ut | t2 |
| 2021-01-01T00:00:40Z | wfm757 | t2 |
| 2021-01-01T00:00:50Z | dtn2bv | t2 |

#### Related

-   [Work with regular expression types](/flux/v0/data-types/basic/regexp/)