Formerly PerformanceIMMO/elm-utils. Search finds this package by either name.
function to index a List to a Dict of Nonempty List
nonemptyGroupBy takes a key-fn and a list. Creates a Dict which maps the key to a Nonempty list of matching elements.
Dict
nonemptyGroupBy takes a key-fn and a list. Creates a
Dictwhich maps the key to a Nonempty list of matching elements.