ToolShed.Data.Foldable

AUTHOR

Dr. Alistair Ward

DESCRIPTION

Miscellaneous polymorphic operations on Foldable types.

Functions

gather :: (Foldable foldable, Ord a) => foldable a -> [[a]]

A specific instance of gatherBy.

gatherBy

Arguments

:: (Foldable foldable, Ord b)

=> (a -> b)

Function to apply before testing for equality.

-> foldable a

The input data.

-> [[a]]

• Group equal (though not necessarily adjacent; cf. groupBy) elements, according to the specified comparator.
• The groups are returned in ascending order, whilst their elements remain in their original order.
• See groupWith, groupSortOn.

Predicates

hasDuplicates :: (Foldable foldable, Ord a) => foldable a -> Bool

• Whether the specified collection contains any equal items.
• See anySame.