index_of_item

Description

Given an array and a value, return the index of the first occurrence of that value within that array, or NULL if the value isn’t found in the array. The index of the first element in an array is 0.

Note that strings and numbers do not compare equal – "42" and 42 are not the same value.

Return type

any

Domain

This is a scalar function (calculates a single output value for a single input row.)

Categories

• Semistructured

Usage

index_of_item( array, item )

Argument	Type	Required	Multiple
array	array	Required	Only one
item	any	Required	Only one

Examples

make_col somevalue:17
make_col somearray:array(parse_json("[5,3,17,3,8,17,2,20]"))
make_col position:index_of_item(somearray, somevalue)

Make a new column position that contains the value 2, because the first occurrence of 17 in the argument array is at index 2.

make_col somevalue:1
make_col somearray:array(parse_json("[5,17,3,8,2,20]"))
make_col position:index_of_item(somearray, somevalue)

Make a new column position that contains a null value, because the value 1 is not present in the array.