regexp.findString() function

regexp.findString() returns the left-most regular expression match in a string.

Function type signature

(r: regexp, v: string) => string

Parameters

r

(Required) Regular expression used to search v.

v

(Required) String value to search.

Examples

• Return the first regular expression match in a string
• Find the first regular expression match in each row

Return the first regular expression match in a string

import "regexp"

regexp.findString(r: /foo.?/, v: "seafood fool")// Returns "food"

Find the first regular expression match in each row

import "regexp"
import "sampledata"

regex = /.{6}$/

sampledata.string()
    |> map(fn: (r) => ({r with _value: regexp.findString(v: r._value, r: regex)}))