Very wastefully computes the eleven sets of gifts
This commit is contained in:
Mike Lynch
commit
d8e9041e1b
104
app/Main.hs
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104
app/Main.hs
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module Main (main) where
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ordinals :: [ String ]
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ordinals = [
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"first",
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"second",
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"third",
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"fourth",
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"fifth",
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"sixth",
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"seventh",
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"eighth",
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"ninth",
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"tenth",
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"eleventh",
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"twelfth"
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]
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cardinals :: [ String ]
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cardinals = [
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"two",
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"three",
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"four",
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"five",
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"six",
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"seven",
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"eight",
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"nine",
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"ten",
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"eleven",
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"twelve"
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]
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gifta :: [ String ]
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gifta = [
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"turtle",
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"French",
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"calling",
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"gold",
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"geese",
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"swans",
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"maids",
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"ladies",
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"lords",
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"pipers",
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"drummers"
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]
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giftb :: [ String ]
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giftb = [
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"doves",
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"hens",
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"birds",
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"rings",
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"a-laying",
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"a-swimming",
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"a-milking",
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"dancing",
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"a-leaping",
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"piping",
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"drumming"
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]
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signatures :: [ ( Int, Int, Int, Int) ]
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signatures = [
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( 3, 6, 5, 0 ),
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( 5, 6, 4, 1 ),
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( 4, 7, 5, 1 ),
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( 4, 4, 5, 5 ),
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( 3, 5, 8, 8 ),
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( 5, 5, 10, 5 ),
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( 5, 5, 9, 20 ),
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( 4, 6, 7, 10 ),
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( 3, 5, 9, 23 ),
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( 6, 6, 6, 3 ),
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( 6, 8, 8, 3 )
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]
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gifts :: [ ( String, String, String ) ]
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gifts = [ ( c, a, b ) | c <- cardinals, a <- gifta, b <- giftb ]
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matchGifts :: ( Int, Int, Int ) -> [ ( String, String, String ) ]
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matchGifts ( i, j, k ) = filter match gifts
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where
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match ( c, a, b ) = (length c == i) && (length a == j) && (length b == k)
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giftStr :: ( String, String, String ) -> String
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giftStr (c, a, b) = c ++ " " ++ a ++ " " ++ b
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wrapGift :: ( Int, Int, Int, Int ) -> String
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wrapGift (i, j, k, l) = gs !! l
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where
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gs = map giftStr $ matchGifts (i, j, k)
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wrapGifts :: String
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wrapGifts = foldr (\a b -> a ++ "\n" ++ b) "" gs
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where
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gs = map wrapGift signatures
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main :: IO ()
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main = putStrLn wrapGifts
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67
stack.yaml
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67
stack.yaml
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# This file was automatically generated by 'stack init'
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#
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# Some commonly used options have been documented as comments in this file.
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# For advanced use and comprehensive documentation of the format, please see:
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# https://docs.haskellstack.org/en/stable/configure/yaml/
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# A 'specific' Stackage snapshot or a compiler version.
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# A snapshot resolver dictates the compiler version and the set of packages
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# to be used for project dependencies. For example:
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#
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# snapshot: lts-23.24
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# snapshot: nightly-2025-06-15
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# snapshot: ghc-9.8.4
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#
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# The location of a snapshot can be provided as a file or url. Stack assumes
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# a snapshot provided as a file might change, whereas a url resource does not.
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#
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# snapshot: ./custom-snapshot.yaml
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# snapshot: https://example.com/snapshots/2024-01-01.yaml
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snapshot:
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url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/24/25.yaml
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# User packages to be built.
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# Various formats can be used as shown in the example below.
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#
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# packages:
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# - some-directory
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# - https://example.com/foo/bar/baz-0.0.2.tar.gz
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# subdirs:
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# - auto-update
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# - wai
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packages:
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- .
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# Dependency packages to be pulled from upstream that are not in the snapshot.
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# These entries can reference officially published versions as well as
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# forks / in-progress versions pinned to a git hash. For example:
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#
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# extra-deps:
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# - acme-missiles-0.3
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# - git: https://github.com/commercialhaskell/stack.git
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# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
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#
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# extra-deps: [ ]
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# Override default flag values for project packages and extra-deps
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# flags: {}
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# Extra package databases containing global packages
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# extra-package-dbs: []
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# Control whether we use the GHC we find on the path
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# system-ghc: true
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#
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# Require a specific version of Stack, using version ranges
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# require-stack-version: -any # Default
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# require-stack-version: ">=3.7"
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#
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# Override the architecture used by Stack, especially useful on Windows
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# arch: i386
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# arch: x86_64
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#
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# Extra directories used by Stack for building
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# extra-include-dirs: [/path/to/dir]
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# extra-lib-dirs: [/path/to/dir]
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#
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# Allow a newer minor version of GHC than the snapshot specifies
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# compiler-check: newer-minor
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67
xmasTwelve.cabal
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67
xmasTwelve.cabal
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cabal-version: 2.2
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-- This file has been generated from package.yaml by hpack version 0.38.1.
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--
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-- see: https://github.com/sol/hpack
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name: xmasTwelve
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version: 0.1.0.0
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description: Please see the README on GitHub at <https://github.com/githubuser/xmasTwelve#readme>
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homepage: https://github.com/githubuser/xmasTwelve#readme
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bug-reports: https://github.com/githubuser/xmasTwelve/issues
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author: Author name here
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maintainer: example@example.com
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copyright: 2025 Author name here
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license: BSD-3-Clause
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license-file: LICENSE
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build-type: Simple
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extra-source-files:
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README.md
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CHANGELOG.md
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source-repository head
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type: git
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location: https://github.com/githubuser/xmasTwelve
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library
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exposed-modules:
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Lib
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other-modules:
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Paths_xmasTwelve
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autogen-modules:
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Paths_xmasTwelve
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hs-source-dirs:
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src
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ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints
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build-depends:
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base >=4.7 && <5
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default-language: Haskell2010
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executable xmasTwelve-exe
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main-is: Main.hs
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other-modules:
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Paths_xmasTwelve
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autogen-modules:
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Paths_xmasTwelve
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hs-source-dirs:
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app
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ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
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build-depends:
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base >=4.7 && <5
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, xmasTwelve
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default-language: Haskell2010
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test-suite xmasTwelve-test
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type: exitcode-stdio-1.0
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main-is: Spec.hs
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other-modules:
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Paths_xmasTwelve
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autogen-modules:
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Paths_xmasTwelve
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hs-source-dirs:
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test
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ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
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build-depends:
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base >=4.7 && <5
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, xmasTwelve
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default-language: Haskell2010
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