Table of Contents

add

Usage: (add acc item)

Add item to the accumulator acc. The exact meaning of adding an
an item depends on the type of the accumulator.

add-items

Usage: (add-items acc items)

Add all elements of a collection coll to the accumulator acc.

combine

Usage: (combine & accs)

Combine the values of the accumulators acc1 and acc2 into a
single accumulator of the same type.

empty-counter

An empty counter accumulator. Its value is a map that stores for
every item the number of times it was added.

empty-counter-with-total

An empty counter-with-total accumulator. It works like the counter
accumulator, except that the total number of items added is stored as the
value of the key :total.

empty-list

An empty list accumulator. Adding an item appends it at the beginning.

empty-map

An empty map accumulator. Items to be added must be [key value] pairs.

empty-maximum

An empty maximum accumulator. Only numbers can be added.

empty-mean-variance

An empty mean-variance accumulator, combining sample mean and
sample variance. Only numbers can be added.

empty-min-max

An empty min-max accumulator, combining minimum and maximum.
Only numbers can be added.

empty-minimum

An empty minimum accumulator. Only numbers can be added.

empty-product

An empty sum accumulator. Only numbers can be added.

empty-queue

An empty queue accumulator. Adding an item appends it at the end.

empty-set

An empty set accumulator.

empty-string

An empty string accumulator. Adding an item (string or character)
appends it at the end.

empty-sum

An empty sum accumulator. Only numbers can be added.

empty-tuple

Usage: (empty-tuple empty-accumulators)

Returns an accumulator tuple with the supplied empty-accumulators
as its value. Accumulator tuples consist of several accumulators that
work in parallel. Added items must be sequences whose number of elements
matches the number of sub-accumulators.

empty-vector

An empty vector accumulator. Adding an item appends it at the end.