first

.gitignore

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+/dist/
+/.cabal-sandbox/
+/cabal.sandbox.config
+/.stack-work/

.travis.yml

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+# Use new container infrastructure to enable caching
+sudo: false
+
+# Choose a lightweight base image; we provide our own build tools.
+language: c
+
+# GHC depends on GMP. You can add other dependencies here as well.
+addons:
+  apt:
+    packages:
+    - libgmp-dev
+
+# The different configurations we want to test. You could also do things like
+# change flags or use --stack-yaml to point to a different file.
+env:
+- ARGS=""
+#- ARGS="--resolver lts-2"
+- ARGS="--resolver lts-3"
+- ARGS="--resolver lts"
+- ARGS="--resolver nightly"
+
+before_install:
+# Download and unpack the stack executable
+- mkdir -p ~/.local/bin
+- export PATH=$HOME/.local/bin:$PATH
+- travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+
+# This line does all of the work: installs GHC if necessary, build the library,
+# executables, and test suites, and runs the test suites. --no-terminal works
+# around some quirks in Travis's terminal implementation.
+script: stack $ARGS --no-terminal --install-ghc test --haddock
+
+# Caching so the next build will be fast too.
+cache:
+  directories:
+  - $HOME/.stack

LICENSE

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+Copyright Author name here (c) 2018
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# bayesian-inference
+
+[![Build Status](https://travis-ci.org/ocramz/bayesian-inference.png)](https://travis-ci.org/ocramz/bayesian-inference)
+
+TODO Description.

Setup.hs

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+import Distribution.Simple
+main = defaultMain

bayesian-inference.cabal

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+name:                bayesian-inference
+version:             0.1.0.0
+-- synopsis:
+-- description:
+homepage:            https://github.com/ocramz/bayesian-inference
+license:             BSD3
+license-file:        LICENSE
+author:              Marco Zocca
+maintainer:          zocca.marco gmail
+copyright:           2018 Marco Zocca
+category:            Machine Learning
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+tested-with:         GHC == 8.0.2
+
+library
+  default-language:    Haskell2010
+  ghc-options:         -Wall
+  hs-source-dirs:      src
+  exposed-modules:     Numeric.Statistics.Inference.Bayes
+  build-depends:       base >= 4.7 && < 5
+                     , mwc-probability
+
+-- executable bayesian-inference
+--   default-language:    Haskell2010
+--   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+--   hs-source-dirs:      app
+--   main-is:             Main.hs
+--   build-depends:       base
+--                      , bayesian-inference
+
+test-suite spec
+  default-language:    Haskell2010
+  ghc-options:         -Wall
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       base
+                     , bayesian-inference
+                     , hspec
+                     , QuickCheck
+
+source-repository head
+  type:     git
+  location: https://github.com/ocramz/bayesian-inference

src/Numeric/Statistics/Inference/Bayes.hs

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+module Numeric.Statistics.Inference.Bayes where
+

stack.yaml

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+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+# resolver: ghcjs-0.1.0_ghc-7.10.2
+# resolver:
+#  name: custom-snapshot
+#  location: "./custom-snapshot.yaml"
+resolver: lts-11.5
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+# - location:
+#    git: https://github.com/commercialhaskell/stack.git
+#    commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+# - location: https://github.com/commercialhaskell/stack/commit/e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#   extra-dep: true
+#  subdirs:
+#  - auto-update
+#  - wai
+#
+# A package marked 'extra-dep: true' will only be built if demanded by a
+# non-dependency (i.e. a user package), and its test suites and benchmarks
+# will not be run. This is useful for tweaking upstream packages.
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver
+# (e.g., acme-missiles-0.3)
+# extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=1.6"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

test/LibSpec.hs

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+module LibSpec where
+
+import Test.Hspec
+import Test.Hspec.QuickCheck
+
+import Lib (ourAdd)
+
+main :: IO ()
+main = hspec spec
+
+spec :: Spec
+spec =
+  describe "Lib" $ do
+    it "works" $ do
+      True `shouldBe` True
+    prop "ourAdd is commutative" $ \x y ->
+      ourAdd x y `shouldBe` ourAdd y x

test/Spec.hs

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+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}