reject_.reject(list, predicate, [context]) Returns the values in list without the elements that the truth test (predicate)

indexBy_.indexBy(list, iteratee, [context]) Given a list, and an iteratee function that returns a key for each element

reduce_.reduce(list, iteratee, [memo], [context]) Aliases: inject, foldl Also known as inject

each_.each(list, iteratee, [context]) Alias: forEach Iterates over a list of elements, yielding

reduceRight_.reduceRight(list, iteratee, memo, [context]) Alias: foldr The right-associative version

some_.some(list, [predicate], [context]) Alias: any Returns true if any of the values in

partition_.partition(array, predicate) Split array into two arrays: one whose elements all satisfy predicate and one

groupBy_.groupBy(list, iteratee, [context]) Splits a collection into sets, grouped by the result of running each value through iteratee

map_.map(list, iteratee, [context]) Alias: collect Produces a new array of values by mapping each

size_.size(list) Return the number of values in the list.