utility-ht-0.0.5.1: Various small helper functions for Lists, Maybes, Tuples, FunctionsSource codeContentsIndex
Data.Record.HT
Synopsis
compare :: [a -> a -> Ordering] -> a -> a -> Ordering
equal :: [a -> a -> Bool] -> a -> a -> Bool
Documentation
compare :: [a -> a -> Ordering] -> a -> a -> OrderingSource

Lexicographically compare a list of attributes of two records.

Example:

 compare [comparing fst, comparing snd]
equal :: [a -> a -> Bool] -> a -> a -> BoolSource

Check whether a selected set of fields of two records is equal.

Example:

 equal [equating fst, equating snd]
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