json.indexOf

json.indexOf() Function

• Introduced in version 1.3b53

Returns the index of the first occurrence of a value in the JSON Array. If the value does not exist in the JSON Array then -1 is returned. All JSON Array indexes start at 0.

Usage

json.indexOf(array, value)

json.indexOf(array, value, start)

Parameters

• array - The JSON Array to search.
• value - The value to find the index of in the JSON Array.
• start - The index to start searching from, if not specified it defaults to 0.

Examples

Find the index of the first occurrence of 1:

[r: json.indexOf("[1,2,3,1,1,3]", 1)]

Returns: 0

Find the index of the first occurrence of 1, starting at index 1:

[r: json.indexOf("[1,2,3,1,1,3]", 1, 1)]

Returns: 3

Find the index of the first occurrence of 2, starting at index 2:

[r: json.indexOf("[1,2,3,1,1,3]", 2, 2)]

Returns: -1

See Also

json.count()