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    Iterator continually {
      // ...
      reader.readLine()
    } takeWhile {
      Option(_).isDefined
    } foreach {
      processExpr
    }

replaces

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// long download: https://downloads.gradle.org/distributions/gradle-2.3-src.zip
// short download: https://repo1.maven.org/maven2/com/ning/async-http-client/1.9.20/async-http-client-1.9.20.jar

// dependencies: see build.sbt

// usage: val f = download(url, localFileName)
// to cancel (if desired): f.cancel(true)

import com.ning.http.client._
import com.ning.http.client.listener._

klaeufer

#!/bin/sh

# installation script for Android SDK and JDK 8 on Ubuntu 
# for Android development with gradlew-based projects
# tested on Cloud9

ANDROID_HOME=$HOME/lib/android-sdk-linux
ANDROID_SDK_VERSION=24.4.1
ANDROID_BUILD_TOOLS_VERSION=23.0.2
ANDROID_API_LEVEL=22

klaeufer

#!/bin/sh

# installation script for Scala sbt on Ubuntu 
# tested on Codenvy

sudo apt-get update
sudo apt-get install -y apt-transport-https

echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823

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// http://underscore.io/blog/posts/2015/04/14/free-monads-are-simple.html
// updated version for scalaz 7.2.x where Free automatically applies the
// Coyoneda transform

import scalaz.{Free, ~>, Id}
import scalaz.std.list._
import scalaz.syntax.traverse._

type UserId = Int
type UserName = String

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val zeroTo: GenericCoalgebra[Int, Option, Int] = n => {
  require { n >= 0 }
  if   (n == 0) (0, None)
  else          (n, Some(n - 1))
}

val treeFromInt: GenericCoalgebra[Int, List, Int] = n => {
  require { n >= 0 }
  if (n == 0) (0, List.empty)
  else        (n, List(n - 1, n - 1))

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// see also https://www.implicitdef.com/2015/11/19/comparing-scala-http-client-libraries.html

// task: use the prime checker webservice
// https://github.com/LoyolaChicagoCode/primenumbers-spray-scala
// to count the number of primes within a given range

/* instructions: create a build.sbt file in your project root folder containing the following lines:

scalaVersion := "3.3.3"

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#!/bin/sh

export ANDROID_HOME=/projects/Android/sdk
mkdir -p $ANDROID_HOME

cd $ANDROID_HOME
wget https://dl.google.com/android/repository/tools_r25.2.3-linux.zip
unzip -q tools_r25.2.3-linux.zip

$ANDROID_HOME/tools/bin/sdkmanager --update

klaeufer

#!/usr/bin/env python

from bs4 import BeautifulSoup

soup = BeautifulSoup(open("target/site/surefire-report.html"), "html.parser")
table = soup.find("table")
headings = [th.get_text() for th in table.find("tr").find_all("th")]
row = table.find_all("tr")[1]
dataset = [td.get_text() for td in row.find_all("td")]