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Within LTS Haskell 24.34 (ghc-9.10.3)
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Web related tools and services. Happstack Server provides an HTTP server and a rich set of functions for routing requests, handling query parameters, generating responses, working with cookies, serving files, and more. For in-depth documentation see the Happstack Crash Course http://happstack.com/docs/crashcourse/index.html
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Asymptotically optimal Brodal/Okasaki heaps. Asymptotically optimal Brodal/Okasaki bootstrapped skew-binomial heaps from the paper "Optimal Purely Functional Priority Queues", extended with a Foldable interface.
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Function generation for `hedgehog` Generating shrinkable, showable functions with hedgehog. See Hedgehog.Function for example usages.
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hetero list with parameter list Please see the README on GitHub at https://github.com/YoshikuniJujo/hetero-parameter-list#readme
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XML subset DOM parser An XML DOM-style parser, that only parses a subset of XML, but is designed to be fast.
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XML parser/formatter based on expat This package provides a general purpose Haskell XML library using Expat to do its parsing (http://expat.sourceforge.net/ - a fast stream-oriented XML parser written in C). It is extensible to any string type, with String, ByteString and Text provided out of the box. Basic usage: Parsing a tree (Tree), formatting a tree (Format). Other features: Helpers for processing XML trees (Proc), trees annotated with XML source location (Annotated), extended XML trees with comments, processing instructions, etc (Extended), XML cursors (Cursor), SAX-style parse (SAX), and access to the low-level interface in case speed is paramount (Internal.IO). The design goals are speed, speed, speed, interface simplicity and modularity. For introduction and examples, see the Text.XML.Expat.Tree module. For benchmarks, http://haskell.org/haskellwiki/Hexpat/ If you want to do interactive I/O, an obvious option is to use lazy parsing with one of the lazy I/O functions such as hGetContents. However, this can be problematic in some applications because it doesn't handle I/O errors properly and can give no guarantee of timely resource cleanup. Because of the generalized list, Hexpat is designed to allow for chunked I/O, but as of this writing I haven't done a nice integration with enumerator and friends. IO is filed under Internal because it's low-level and most users won't want it. The other Internal modules are re-exported by Annotated, Tree and Extended, so you won't need to import them directly. If you have trouble building on Windows, you can try the bundle flag. This will make it build from the source of libexpat bundled inside the hexpat package: cabal install -f bundle hexpat Credits to Iavor Diatchki and the xml (XML.Light) package for Proc and Cursor. Thanks to the many contributors. ChangeLog: 0.15 changes intended to fix a (rare) "error: a C finalizer called back into Haskell." that seemed only to happen only on ghc6.12.X; 0.15.1 Fix broken Annotated parse; 0.16 switch from mtl to transformers; 0.17 fix mapNodeContainer & rename some things.; 0.18 rename defaultEncoding to overrideEncoding. 0.18.3 formatG and indent were demanding list items more than once (inefficient in chunked processing); 0.19 add Extended.hs; 0.19.1 fix a memory leak introduced in 0.19, delegate parsing to bound thread if unbound (see note above); 0.19.2 include expat source code so 'cabal install' just works on Linux, Mac and Windows (thanks Jacob Stanley); 0.19.3 fix misconfiguration of expat which broke entity parsing; 0.19.4 bump version constraint for text; 0.19.5 bump text to < 0.12 and fix text-0.10.0.1 breakage; 0.19.6 dependency breakage with List; 0.19.7 ghc-7.2.1 compatibility; 0.19.8 fix space leak on lazy parse under ghc-7.2.1; 0.19.9 fix formatting of > character + improve performance; 0.19.10 ghc-7.4.x compatibility; 0.20.1 fix an unfortunate crash when used in parallel processing and greatly improve performance; 0.20.2 make parseSaxG lazier; 0.20.3 minor build issues; 0.20.4 remove dependency on extensible-exceptions; 0.20.5 bump text upper bound; 0.20.6 bump text again to include 1.1.x.x; 0.20.7 bump text again for 1.2.x.x; 0.20.8 bump utf8-string dep; 0.20.9 bump deepseq dep/ghc-7.10 compatibility.; 0.20.10 increase dependency upper bounds; 0.20.11 update to libexpat-2.2.1 which includes several security fixes; 0.20.12 use the system libexpat by default, but provide a bundle flag to allow a bundled copy of expat to be used, which might make life easier on Windows: cabal install -f bundle hexpat; 0.20.13 Fix some mistakes made in 0.20.12 cabal file.
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Command-line interface for the hledger accounting system The command-line interface for the hledger accounting system. Its basic function is to read a plain text file describing financial transactions and produce useful reports. hledger is a robust, cross-platform set of tools for tracking money, time, or any other commodity, using double-entry accounting and a simple, editable file format, with command-line, terminal and web interfaces. It is a Haskell rewrite of Ledger, and one of the leading implementations of Plain Text Accounting. Read more at: https://hledger.org
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Numerical computation Purely functional interface to selected numerical computations, internally implemented using GSL.
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A modern format for Haskell packages See README at https://github.com/sol/hpack#readme
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Haskell bindings to libpqtypes Efficient and easy-to-use bindings to (slightly modified) libpqtypes, a libpq extension that adds support for a binary transport format and composite types. . Source code of libpqtypes is bundled along with the bindings. . Examples can be found in the examples directory.