_.unionWith([arrays], [comparator])

_.fromPairs(pairs)

_.takeWhile(array, [predicate=_.identity])

_.zipWith([arrays], [iteratee=_.identity])

_.chunk(array, [size=1])

_.union([arrays]) source

_.takeRight(array, [n=1])

_.sortedLastIndexBy(array, value, [iteratee=_.identity])

_.sortedUniqBy(array, [iteratee])

_.last(array) source