---
title: strings.trimSuffix() function
description: >
  `strings.trimSuffix()` removes a suffix from a string.
menu:
  flux_v0_ref:
    name: strings.trimSuffix
    parent: strings
    identifier: strings/trimSuffix
weight: 101
---

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`strings.trimSuffix()` removes a suffix from a string.

Strings that do not end with the suffix are returned unchanged.

##### Function type signature

```js
(suffix: string, v: string) => string
```

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

## Parameters

### v
({{< req >}})
String to trim.



### suffix
({{< req >}})
Suffix to remove.




## Examples

### Remove a suffix from all values in a column

```js
import "strings"

data
    |> map(fn: (r) => ({r with _value: strings.trimSuffix(v: r._value, suffix: "_ex1")}))

```

{{< expand-wrapper >}}
{{% expand "View example input and output" %}}

#### Input data

| _time                | _value          | *tag |
| -------------------- | --------------- | ---- |
| 2021-01-01T00:00:00Z | smpl_g9qczs_ex1 | t1   |
| 2021-01-01T00:00:10Z | smpl_0mgv9n_ex1 | t1   |
| 2021-01-01T00:00:20Z | smpl_phw664_ex1 | t1   |
| 2021-01-01T00:00:30Z | smpl_guvzy4_ex1 | t1   |
| 2021-01-01T00:00:40Z | smpl_5v3cce_ex1 | t1   |
| 2021-01-01T00:00:50Z | smpl_s9fmgy_ex1 | t1   |

| _time                | _value          | *tag |
| -------------------- | --------------- | ---- |
| 2021-01-01T00:00:00Z | smpl_b5eida_ex1 | t2   |
| 2021-01-01T00:00:10Z | smpl_eu4oxp_ex1 | t2   |
| 2021-01-01T00:00:20Z | smpl_5g7tz4_ex1 | t2   |
| 2021-01-01T00:00:30Z | smpl_sox1ut_ex1 | t2   |
| 2021-01-01T00:00:40Z | smpl_wfm757_ex1 | t2   |
| 2021-01-01T00:00:50Z | smpl_dtn2bv_ex1 | t2   |


#### Output data

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

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

{{% /expand %}}
{{< /expand-wrapper >}}