Changelog 2.4 Added any function. 2.3 frequencies counts number of elements in a List Comparable. 2.2 filterGroupBy is a version of groupBy that works similar to List.filterMap. 2.1 insertDedupe works like insert, but handles the case of duplicate keys. fromListDedupe works like fromList, but handles the case of duplicate keys. fromListDedupeBy works like fromListBy, but handles the case of duplicate keys. 2.0 mapKeys now has a more liberal type signature. Apparently, this is a mayor change. 1.5 Added find function. 1.4 Added filterMap function. Added invert function. Improved documentation. 1.3.2 groupBy now groups elements by order in list. 1.3.1 Support for Elm 0.18 1.3.0 Add mapKeys function. 1.2.0 Add fromListBy function. Improved documentation. 1.1.0 Add keepOnly function. Add removeMany function. 1.0.1 Optimized groupBy function. 1.0.0 Initial release.