[ENH] Numba support for single non-equi joins (#1151)

* add numba option for single join

* add comments to functions; add annotations

* clean up utils

* Updates based on feedback

* add Literal annotation

* update _convert_to_numpy_array based on feedback

* remove enums for keep and how, based on feedback; optimize numba functions based on feedback

* Update janitor/functions/conditional_join.py

Co-authored-by: Zero <[email protected]>

* Update janitor/functions/conditional_join.py

Co-authored-by: Zero <[email protected]>

* Update janitor/functions/conditional_join.py

Co-authored-by: Zero <[email protected]>

* changelog

* changelog

* add comments

* changelog

Co-authored-by: sammychoco <[email protected]>
Co-authored-by: Zero <[email protected]>

Author: 3 people

CHANGELOG.md

@@ -3,10 +3,10 @@
 ## [Unreleased]
 
 -   [DOC] Updated developer guide docs.
--   [ENH] Allow column selection/renaming within conditional_join. #1102. Also allow first or last match. #1020 @samukweku.
+-   [ENH] Allow column selection/renaming within conditional_join. Issue #1102. Also allow first or last match. Issue #1020 @samukweku.
 -   [ENH] New decorator `deprecated_kwargs` for breaking API. #1103 @Zeroto521
--   [ENH] Extend select_columns to support non-string columns. Also allow selection on MultiIndex columns via level parameter. #1105 @samukweku
--   [ENH] Performance improvement for groupby_topk. #1093 @samukweku
+-   [ENH] Extend select_columns to support non-string columns. Also allow selection on MultiIndex columns via level parameter. Issue #1105 @samukweku
+-   [ENH] Performance improvement for groupby_topk. Issue #1093 @samukweku
 -   [ENH] `min_max_scale` drop `old_min` and `old_max` to fit sklearn's method API. Issue #1068 @Zeroto521
 -   [ENH] Add `jointly` option for `min_max_scale` support to transform each column values or entire values. Default transform each column, similar behavior to `sklearn.preprocessing.MinMaxScaler`. (Issue #1067, PR #1112, PR #1123) @Zeroto521
 -   [INF] Require pyspark minimal version is v3.2.0 to cut duplicates codes. Issue #1110 @Zeroto521
@@ -19,6 +19,7 @@
 -   [INF] Set independent environment for building documentation. PR #1141 @Zeroto521
 -   [DOC] Add local documentation preview via github action artifact. PR #1149 @Zeroto521
 -   [ENH] Enable `encode_categorical` handle 2 (or more ) dimensions array. PR #1153 @Zeroto521
+-   [ENH] Faster computation for a single non-equi join, with a numba engine. Issue #1102 @samukweku
 
 ## [v0.23.1] - 2022-05-03