mapIndexed()

Perform a mapping operation given the element being mapped and its zero-based index

Implementation Notes

Signature

mapIndexed(BiFunction<Long, INPUT, OUTPUT> mappingFunction)

mappingFunction - A non-null function to convert input elements and their indexes to output elements.

Examples

Map with index

Stream
    .of("A", "B", "C", "D")
    .gather(
        Gatherers4j.mapIndexed(
            (index, element) -> element + index
        )
     )
     .toList();

// [A0 B1 C2 D3]