docs-v2/content/v2.0/reference/flux/functions/strings/hasprefix.md

title	description	menu	weight	related
strings.hasPrefix() function	The strings.hasPrefix() function indicates if a string begins with a specific prefix.	v2_0_ref name parent strings.hasPrefix Strings	301	/v2.0/reference/flux/functions/strings/hassuffix

The strings.hasPrefix() function indicates if a string begins with a specified prefix.

Output data type: Boolean

import "strings"

strings.hasPrefix(v: "go gopher", t: "go")

// returns true

Parameters

v

The string value to search.

Data type: String

t

The prefix to search for.

Data type: String

Filter based on the presence of a prefix in a column value

import "strings"

data
  |> filter(fn:(r) => strings.hasPrefix(v: r.metric, t: "int_" ))