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

title	description	menu	weight
strings.countStr() function	The strings.countStr() function counts the number of non-overlapping instances of a substring appears in a string.	v2_0_ref name parent strings.countStr Strings	301

The strings.countStr() function counts the number of non-overlapping instances of a substring appears in a string.

Output data type: Integer

import "strings"

strings.countStr(v: "Hello mellow fellow", substr: "ello")

// returns 3

Parameters

v

The string value to search.

Data type: String

substr

The substring to count.

Data type: String

{{% note %}} The function counts only non-overlapping instances of substr. For example:

strings.coutnStr(v: "ooooo", substr: "oo")

// Returns 2 -- (oo)(oo)o

{{% /note %}}

Examples

Count instances of a substring within a string

import "strings"

data
  |> map(fn: (r) => ({
      r with
      _value: strings.countStr(v: r.message, substr: "uh")
    })
  )