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{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies #-}

import Control.Monad
import Control.Monad.Free

class (Functor f, Functor g, Functor h) => Compose f g h | f g -> h where
  compose :: f x -> g y -> Free h (Free f x, Free g y)
  compose f g = return (liftF f, liftF g)

composeF :: Compose f g h => Free f x -> Free g x -> Free h x

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trait Module {
  type shape
}

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{-# LANGUAGE OverloadedStrings #-}

module Main where

import Control.Lens            -- lens
import Control.Monad.IO.Class  -- transformers
import Control.Monad.Trans.AWS -- amazonka
import Network.AWS.EC2         -- amazonka-ec2

main :: IO ()

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{-# LANGUAGE GADTs #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE StandaloneDeriving #-}
module RedBlackTree where

data Zero 
data Succ n
type One = Succ Zero

data Black

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# Installing graphite dependencies
apt-get install -y python2.6 python-pip python-cairo python-django python-django-tagging
apt-get install -y libapache2-mod-wsgi python-twisted python-memcache python-pysqlite2 python-simplejson 
pip install whisper
pip install carbon
pip install graphite-web

# Setup a vhost by grabbing the example the graphite team released on their repo.
# In this file, you'll provide the url used to access to your Graphite dashboard
wget https://raw.github.com/tmm1/graphite/master/examples/example-graphite-vhost.conf -O /etc/apache2/sites-available/graphite

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How to install latest GHC 7.10.1 + cabal 1.22.3.0 from source on ubuntu

for your convinience these instuction is available as:
gist
git repo

ghc

ubuntu prerequisites

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import scala.language.implicitConversions

/**
 * @author gwenzek
 *
 */

class ArgsOps(ops: Map[String, OptionalParam], val args: Array[String]){
    def apply(op: String) = ops(op)
}

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trait Isomorphism[A, B] {
  def fw: A => B
  def bw: B => A
}
 
object Isomorphism {
  implicit def anyIso[A](a: A) = new {
    def as[B](implicit ev: Isomorphism[A, B]) = ev fw a
  }
 

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#![feature(phase)]
#[phase(plugin, link)] extern crate log;
extern crate green;
extern crate rustuv;

use std::io;
use std::os;
use std::io::{Listener,Acceptor,TcpStream};

#[start]

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/*
 * OpenSimplex (Simplectic) Noise in Java.
 * (v1.0.1 With new gradient set and corresponding normalization factor, 9/19/14)
 */

public class OpenSimplexNoise {

	private static final double STRETCH_CONSTANT_3D = -1.0 / 6;
	private static final double SQUISH_CONSTANT_3D = 1.0 / 3;