Difference between revisions of "Applications and libraries/Data structures"
From HaskellWiki
m 
DonStewart (talk  contribs) (link) 

Line 74:  Line 74:  
* Syntax sugar to make using of mutable objects easier (=:, +=, =,..) 
* Syntax sugar to make using of mutable objects easier (=:, +=, =,..) 

* Reimplemented Arrays library with the following improvements: 
* Reimplemented Arrays library with the following improvements: 

−  +  * Unboxed arrays now can be used in polymorphic functions 

−  +  * The MArray class now supports arrays with dynamic bounds 

−  +  * Implementation of dynamic (resizable) arrays 

+  
+  See also [[Modern array libraries]] 

=== Strings === 
=== Strings === 
Revision as of 09:14, 17 September 2006
 The copyright status of this work is not known. Please help resolve this on the talk page.
This page contains a list of libraries and tools in a certain category. For a comprehensive list of such pages, see Applications and libraries.
Contents
Haskell Libraries and Tools for Data Structures
 Edison
 This is the latest version of the Edison library of efficient data structures. There are also earlier version of Edison by Chris Okasaki. It provides sequences, finite maps, priority queues, and sets/bags. (overview paper).
 Data.Tree.AVL
 An implementation of AVL trees and related utilities.
 Data.StringMap
 A library providing maps from String keys to values, based on Tries.
 Strafunski
 A bundle for generic programming. It provides programming support for generic traversal as useful in the implementation of program transformations.
 Partial v0.1
 The Partial library provides a partial order class. It also provides routines for generating a Hasse diagram from a set and a partial order. Renderers are provided for the abstract Hasse diagram representation into LaTeX (via Xypic) and into dot, the format for AT&T's Graphviz tools. Since no horizontal sorting is done, the Xypic output is rather poor at present; dot does a much better job with its layout optimisation algorithm.
 Discrete Interval Encoding Trees
 The discrete interval encoding tree is a structure for storing subsets of types having a total order and a predecessor and a successor function.
 Ranged Sets
 A ranged set is a list of nonoverlapping ranges. The ranges have upper and lower boundaries, and a boundary divides the base type into values above and below. No value can ever sit on a boundary. So you can have the set {2.0 < x <= 3.0, 5.3 < x < 6}
 HList
 A heterogeneous collection is a datatype that is capable of storing data of different types, while providing operations for lookup, update, iteration, and others. There are various kinds of heterogeneous collections, differing in representation, invariants, and access operations.
 monadLib
 Iavor Diatchki's library of monad transformers for Haskell. It enables the quick construction of monads  abstract data types that capture common programming idioms, such as throwing and catching exceptions or continuations. In many programming languages such features are built into the language (if they're provided at all), but in Haskell they are userprogrammable.
 Pointless Haskell
 Pointless Haskell is library for pointfree programming with recursion patterns defined as hylomorphisms. It also allows the visualization of the intermediate data structure of the hylomorphisms with GHood. This feature together with the DrHylo tool allows us to easily visualize recursion trees of Haskell functions.
 rhaskell : Reactive Objects
 Stefan Wehr's reactive objects library. Reactive objects are a convenient abstraction for writing programs which have to interact with a concurrent environment. A reactive object has two characteristics: the abandonment of all blocking operations and the unification of the concepts state and process. The former allows a reactive object to accept input from multiple sources without imposing any ordering on the input events. The latter prevents race conditions because the state of an object is only manipulated from the process belonging to the object.
 GenUtil
 A collection of random useful utility functions written in pure Haskell 98. In general, it trys to conform to the naming scheme put forth the Haskell prelude and fill in the obvious omissions, as well as provide useful routines in general.
 PersistentDocument The link is dead, somebody please either update it or remove it.
 The persistent document abstraction takes care of dealing with a document you want to open from and save to disk and that supports undo. This functionality can be used by editors of arbitrary documents and saves you a lot of quite subtle coding.
 Zipper monad
 A generic monad for navigating around arbitrary data structures
Graphs
 FGL  A Functional Graph Library
 The functional graph library provides a collection of graph operations.
 Data.Relation
 Part of the UMinho Haskell libraries, this library provides a representation and operations on relations. A special case of relations are graphs. The operations include graph chopping and slicing, strong connected component analysis, graphs metrics, and more.
 Haskell Graph Automorphism Library
 JeanPhilippe Bernardy's implementation of Brendan McKay's algorithm for graph canonic labeling and automorphism group (Nauty).
IO
 Streams
 Streams is a featurerich, flexible, extensible, backwardcompatible and fast I/O library. It supports various stream types: files and legacy Handle type, string and memory buffers, pipes. There is also common functionality, available for any stream: buffering, Char encoding, locking.
Mutable data
 The Haskell STate Preprocessor
 This is a short preprocessor for stateful Haskell programs. It aleviates the pain of performing single array lookup/write/update functions with some syntax to support it. It also supports hash table operations based on the HashTable implementation available from the author. Finally, it supports monadic if and monadic case constructions. It is lightweight in the sense that it performs no syntactic analysis and is essentially a character transformer.
 Arrays & References Library
 Featuring:
 Unboxed references in IO and ST monads
 Monadindependent interfaces to boxed and unboxed references
 Syntax sugar to make using of mutable objects easier (=:, +=, =,..)
 Reimplemented Arrays library with the following improvements:
 Unboxed arrays now can be used in polymorphic functions
 The MArray class now supports arrays with dynamic bounds
 Implementation of dynamic (resizable) arrays
See also Modern array libraries
Strings
 Data.ByteString
 The FPS library provides mmapped and malloc'd packed strings (byte arrays held by a ForeignPtr), along with a list interface to these strings. It lets you do extremely fast I/O in Haskell; in some cases, even faster than typical C implementations, as well as conserving space.
 MissingH
 MissingH is a library of pureHaskell utility functions relating to strings, logging, and I/O.
 HsLocale
 A localeaware replacement for the standard IO routines, and support for wide strings
 VariableExpansion
 A library for variable expansion inside strings
Serialising data
 NewBinary
 A port of Malcolm Wallace's Binary library from NHC, offering facilities for heap compression and binary I/O. The defacto standard for binary I/O in Haskell
 SerTH
 SerTH is a binary serialization library for Haskell. It supports serializing cyclic datatypes in a fast binary format. SerTH uses template haskell for deriving the serializing interface for new datatypes.
 AltBinary
 AltBinary is an exhaustive library that support binary I/O and serialization. It's part of Streams library, so serialization is possible to any I/O source, from String to memorymapped file. It's also backward compatible with NewBinary library what makes translation of old code trivial. Very fast, very featurerich, Hugs/GHC compatible, etc, etc...
Compressing data
 Compression2005
 Features of the Compression2005 Library:
 easy and uniform access to most competitive free compression algorithms as of April'05: LZMA, PPMd and GRZip
 all input/output performed via usersupplied functions (callbacks), so you can compress data in memory, files, pipes, sockets and anything else
 all parameters of compression algorithm are defined with a single string, for example "lzma:8mb:fast:hc4:fb32".
Using this library, you can write whole bziplike utility as oneliner! And it will compress even better than bzip2!
Benchmarking data structures
 Auburn
 Auburn is Graeme Moss's kit for benchmarking implementations of lazy data structures. Give it several implementations of an ADT (abstract data type) and it will tell you which one is best for your particular application.
 Bench
 Simple time and space benchmarking for various listlike data structures. Easily adapted to arbitrary structures