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

_.head(array) source

_.difference(array, [values])

_.findIndex(array, [predicate=_.identity], [fromIndex=0])

_.uniqBy(array, [iteratee=_.identity])

_.fill(array, value, [start=0], [end=array.length])

_.concat(array, [values])

_.pull(array, [values])

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

_.pullAll(array, values)