ARTICLE: "sequences-combinators" "Sequence combinators"
"Iteration:"
{ $subsections
    each
    each-index
    reduce
    interleave
    replicate
    replicate-as
}
"Mapping:"
{ $subsections
    map
    map-as
    map-index
    map-reduce
    accumulate
    produce
    produce-as
}

! OR would you prefer

ARTICLE: "sequences-combinators" "Sequence combinators"
"Iteration:"
{ $subsections each each-index reduce interleave replicate replicate-as }
"Mapping:"
{ $subsections map map-as map-index map-reduce accumulate produce produce-as }