.. _sec-collection-functions:

Collection functions
--------------------
.. currentmodule:: hail.expr.functions

.. rubric:: Collection constructors

.. autosummary::

    dict
    empty_dict
    array
    empty_array
    set
    empty_set

.. rubric:: Collection functions

.. autosummary::

    len
    map
    flatmap
    starmap
    zip
    enumerate
    zip_with_index
    flatten
    any
    all
    filter
    sorted
    find
    group_by
    fold
    array_scan
    reversed
    keyed_intersection
    keyed_union

.. autofunction:: len
.. autofunction:: map
.. autofunction:: flatmap
.. autofunction:: starmap
.. autofunction:: zip
.. autofunction:: enumerate
.. autofunction:: zip_with_index
.. autofunction:: flatten
.. autofunction:: any
.. autofunction:: all
.. autofunction:: filter
.. autofunction:: sorted
.. autofunction:: find
.. autofunction:: group_by
.. autofunction:: fold
.. autofunction:: array_scan
.. autofunction:: reversed
.. autofunction:: keyed_intersection
.. autofunction:: keyed_union