indexOf

Returns the index of the first occurrence of a substring within a string. Returns -1 if the substring is not found.

Syntax

indexOf(input, substring)

or chained:

<string>.indexOf(substring)

Arguments

• input (string, optional when chained) - The string to search in.

• substring (string) - The substring to search for.

Examples

Find a substring

indexOf("hello world", "world")
// 6

Chained usage

"foobar".indexOf("bar")
// 3

Not found

"hello".indexOf("xyz")
// -1

CLI usage

$ echo '{"path": "/api/v2/users"}' | dasel -i json 'path.indexOf("/v2")'
4

Check if a substring exists

"hello world".indexOf("world") >= 0
// true