ContextQMD
Back to Influxdb

strings.trim() function

content/flux/v0/stdlib/strings/trim.md

latest3.0 KB
Original Source
<!------------------------------------------------------------------------------ IMPORTANT: This page was generated from comments in the Flux source code. Any edits made directly to this page will be overwritten the next time the documentation is generated. To make updates to this documentation, update the function comments above the function definition in the Flux source code: https://github.com/influxdata/flux/blob/master/stdlib/strings/strings.flux#L99-L99 Contributing to Flux: https://github.com/influxdata/flux#contributing Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md ------------------------------------------------------------------------------->

strings.trim() removes leading and trailing characters specified in the cutset from a string.

Function type signature
js
(cutset: string, v: string) => string

{{% caption %}} For more information, see Function type signatures. {{% /caption %}}

Parameters

v

({{< req >}}) String to remove characters from.

cutset

({{< req >}}) Leading and trailing characters to remove from the string.

Only characters that match the cutset string exactly are trimmed.

Examples

Trim leading and trailing periods from all values in a column

js
import "strings"

data
    |> map(fn: (r) => ({r with _value: strings.trim(v: r._value, cutset: "smpl_")}))

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

Input 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

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 >}}