docs-v2/content/flux/v0.x/stdlib/strings/isupper.md

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title description aliases menu weight flux/v0.x/tags related introduced
strings.isUpper() function The strings.isUpper() function tests if a single character string is uppercase.
/influxdb/v2.0/reference/flux/functions/strings/isupper/
/influxdb/v2.0/reference/flux/stdlib/strings/isupper/
/influxdb/cloud/reference/flux/stdlib/strings/isupper/
flux_0_x_ref
name parent
strings.isUpper strings
301
tests
/flux/v0.x/stdlib/strings/islower
0.18.0

The strings.isUpper() function tests if a single character string is uppercase.

Output data type: Boolean

import "strings"

strings.isUpper(v: "A")

// returns true

Parameters

v

The single-character string value to test.

Examples

Filter by columns with single-letter uppercase values
import "strings"

data
    |> filter(fn: (r) => strings.isUpper(v: r.host))