\( O(n \log n) \) . sort sorts the specified Seq by the natural ordering of its elements. The sort is stable. If stability is not required, unstableSort can be slightly faster.

Since: 0.3.0

\( O(n \log n) \) . sortBy sorts the specified Seq according to the specified comparator. The sort is stable. If stability is not required, unstableSortBy can be slightly faster.

Since: 0.3.0

\( O(n \log n) \) . sortOn sorts the specified Seq by comparing the results of a key function applied to each element. sortOn f is equivalent to sortBy ( compare `on` f) , but has the performance advantage of only evaluating f once for each element in the input list. This is called the decorate-sort-undecorate paradigm, or Schwartzian transform.

An example of using sortOn might be to sort a Seq of strings according to their length:

sortOn length (fromList ["alligator", "monkey", "zebra"]) == fromList ["zebra", "monkey", "alligator"]

If, instead, sortBy had been used, length would be evaluated on every comparison, giving \( O(n \log n) \) evaluations, rather than \( O(n) \) .

If f is very cheap (for example a record selector, or fst ), sortBy ( compare `on` f) will be faster than sortOn f .

Since: 0.5.11

\( O(n \log n) \) . unstableSort sorts the specified Seq by the natural ordering of its elements, but the sort is not stable. This algorithm is frequently faster and uses less memory than sort .

\( O(n \log n) \) . A generalization of unstableSort , unstableSortBy takes an arbitrary comparator and sorts the specified sequence. The sort is not stable. This algorithm is frequently faster and uses less memory than sortBy .

Since: 0.3.0

\( O(n \log n) \) . unstableSortOn sorts the specified Seq by comparing the results of a key function applied to each element. unstableSortOn f is equivalent to unstableSortBy ( compare `on` f) , but has the performance advantage of only evaluating f once for each element in the input list. This is called the decorate-sort-undecorate paradigm, or Schwartzian transform.

An example of using unstableSortOn might be to sort a Seq of strings according to their length:

unstableSortOn length (fromList ["alligator", "monkey", "zebra"]) == fromList ["zebra", "monkey", "alligator"]

If, instead, unstableSortBy had been used, length would be evaluated on every comparison, giving \( O(n \log n) \) evaluations, rather than \( O(n) \) .

If f is very cheap (for example a record selector, or fst ), unstableSortBy ( compare `on` f) will be faster than unstableSortOn f .

Since: 0.5.11

A simple pairing heap.

A pairing heap tagged with the original position of elements, to allow for stable sorting.

A pairing heap tagged with some key for sorting elements, for use in unstableSortOn .

A pairing heap tagged with both a key and the original position of its elements, for use in sortOn .

mergeQ merges two Queue s.

mergeIQ merges two IndexedQueue s, taking into account the original position of the elements.

mergeTQ merges two TaggedQueue s, based on the tag value.

mergeITQ merges two IndexedTaggedQueue s, based on the tag value, taking into account the original position of the elements.

Pop the smallest element from the queue, using the supplied comparator.

Pop the smallest element from the queue, using the supplied comparator, deferring to the item's original position when the comparator returns EQ .

Pop the smallest element from the queue, using the supplied comparator on the tag.

Pop the smallest element from the queue, using the supplied comparator on the tag, deferring to the item's original position when the comparator returns EQ .

A foldMap -like function, specialized to the Option monoid, which takes advantage of the internal structure of Seq to avoid wrapping in Maybe at certain points.

A foldMapWithIndex -like function, specialized to the Option monoid, which takes advantage of the internal structure of Seq to avoid wrapping in Maybe at certain points.