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Description | |||||||||
This module provides various helpful utilities for dealing with Data.Maps. Written by John Goerzen, jgoerzen@complete.org | |||||||||
Synopsis | |||||||||
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Basic Utilities | |||||||||
flipM :: (Ord key, Ord val) => Map key val -> Map val [key] | |||||||||
Flips a Map. See flipAL for more on the similar function for lists. | |||||||||
flippedLookupM :: (Ord val, Ord key) => val -> Map key val -> [key] | |||||||||
Returns a list of all keys in the Map whose value matches the parameter. If the value does not occur in the Map, the empty list is returned. | |||||||||
forceLookupM :: (Show key, Ord key) => String -> key -> Map key elt -> elt | |||||||||
Performs a lookup, and raises an exception (with an error message prepended with the given string) if the key could not be found. | |||||||||
Conversions | |||||||||
strToM :: (Read a, Read b, Ord a) => String -> Map a b | |||||||||
Converts a String into a String, String Map. See strToAL for more on the similar function for association lists. This implementation is simple: strToM = Data.Map.fromList . strToAL This function is designed to work with Map String String objects, but may work with other key/value combinations if they have simple representations. | |||||||||
strFromM :: (Show a, Show b, Ord a) => Map a b -> String | |||||||||
Converts a String, String Map into a string representation. See strFromAL for more on the similar function for association lists. This implementation is simple: strFromM = strFromAL . Data.Map.toList This function is designed to work with Map String String objects, but may also work with other objects with simple representations. | |||||||||
Produced by Haddock version 0.8 |