hxt-9.2.2: A collection of tools for processing XML with Haskell.

Portability | portable
Stability | stable
Maintainer | Uwe Schmidt (uwe@fh-wedel.de)
Safe Haskell | Safe-Infered

Data.AssocList

Description

Simple key value assocciation list implemented as unordered list of pairs

Synopsis

- type AssocList k v = [(k, v)]
- lookupDef :: Eq k => v -> k -> AssocList k v -> v
- lookup1 :: Eq k => k -> AssocList k [e] -> [e]
- hasEntry :: Eq k => k -> AssocList k v -> Bool
- addEntry :: Eq k => k -> v -> AssocList k v -> AssocList k v
- addEntries :: Eq k => AssocList k v -> AssocList k v -> AssocList k v
- delEntry :: Eq k => k -> AssocList k v -> AssocList k v
- delEntries :: Eq k => [k] -> AssocList k v -> AssocList k v

# Documentation

type AssocList k v = [(k, v)]

lookupDef :: Eq k => v -> k -> AssocList k v -> v

lookup with default value

lookup1 :: Eq k => k -> AssocList k [e] -> [e]

lookup with empty list (empty string) as default value

hasEntry :: Eq k => k -> AssocList k v -> Bool

test for existence of a key

addEntry :: Eq k => k -> v -> AssocList k v -> AssocList k v

add an entry, remove an existing entry before adding the new one at the top of the list, addEntry is strict

addEntries :: Eq k => AssocList k v -> AssocList k v -> AssocList k v

add a whole list of entries with `addEntry`

delEntry :: Eq k => k -> AssocList k v -> AssocList k v

delete an entry, delEntry is strict

delEntries :: Eq k => [k] -> AssocList k v -> AssocList k v

delete a list of entries with `delEntry`