index of

FEEL built-in function · FEEL list functions

index of(list, match)

Returns the positions of all occurrences of match, as an ascending list of 1-based indexes.

Parameters

Parameter	Type	Description
list	list	the list to search
match	any	the value to find

Examples

index of([1, 2, 3, 2], 2)

[2, 4] Try it ↑

Edge cases and null handling

index of([1, 2], 3)

[] Try it ↑

No match gives an empty list, not null or 0.

Part of FEEL list functions: how positions, nulls and single values behave across all of them, aggregating over lists of contexts, and every function side by side.

Related functions

list contains

Defined by the OMG DMN 1.6 specification, chapter 10.3.4 (built-in functions).