strings.index() function

The strings.index() function returns the index of the first instance of a substring in a string. If the substring is not present, it returns -1.

*Output data type: Integer*

import "strings"
strings.index(v: "go gopher", substr: "go")
// returns 0

Parameters

v

The string value to search.

*Data type: String*

substr

The substring to search for.

*Data type: String*

Examples

Find the first occurrence of a substring

import "strings"
data
  |> map(fn: (r) => ({
      r with
      the_index: strings.index(v: r.pageTitle, substr: "the")
    })
  )

Related articles

• strings.indexAny() function
• strings.lastIndex() function
• strings.lastIndexAny() function