mikemckibben’s gists

mikemckibben / hackerrank.hsfiles

Last active October 30, 2017 16:23

Stack Template for hackerrank project stub

	{-# START_FILE {{name}}.cabal #-}
	name: {{name}}
	version: 0.1.0.0
	build-type: Simple
	cabal-version: >=1.10

	executable solution
	hs-source-dirs: .
	main-is: Main.hs
	ghc-options: -threaded -rtsopts -with-rtsopts=-N

mikemckibben / AnyParamSpec.scala

Last active August 29, 2015 14:11

Spray AnyParam with default value Bug

	import org.specs2.mutable.Specification
	import spray.http._
	import spray.routing._
	import spray.testkit.Specs2RouteTest

	class AnyParamSpec extends Specification with Specs2RouteTest with Directives {

	val route = anyParam('p ? "default") { p => complete(StatusCodes.OK, p) }
	// replace with the following workaround
	//val route = (anyParam('p) \| provide("default")) { p => complete(StatusCodes.OK, p) }

mikemckibben / EitherExampleSpec.scala

Last active June 28, 2017 17:19

Example Unmarshalling an Either[A, B] with spray-json

	import org.specs2.mutable.Specification
	import spray.http.{HttpResponse, StatusCodes}
	import spray.httpx.SprayJsonSupport
	import spray.httpx.marshalling._
	import spray.httpx.unmarshalling._
	import spray.json._

	/***
	* scalaVersion := "2.11.2"
	*

mikemckibben / ex-regex-pattern-matching.scala

Created January 11, 2013 16:46

Example of regex extractor with pattern matching in scala.

	object Parser {
	val Result = """mac: (\S+) sites: \[([^]]+)\]""".r
	def parseLine(line: String): Option[(String,Seq[String])] = line match {
	case Result(mac,sites) => Some((mac, sites.split(""",\s*""").toSeq))
	case _ => None
	}
	}

	val input = io.Source.fromFile("input.txt")
	val lines = input.getLines()

mikemckibben / ex-copy-plugin-dependencies-task.sbt

Created January 9, 2013 20:35

An example of how to write a task that copies project dependencies to a directory.

	TaskKey[Unit]("copy-plugin-dependencies") <<= (update) map {
	(updateReport) =>
	updateReport.select(Set("compile", "runtime")) map { jar =>
	import java.util.jar.{JarFile, Manifest => JarManifest}
	val jarFile = new JarFile(jar)
	val jarAttributes = jarFile.getManifest().getMainAttributes()
	val targetdir = file("plugins")
	if (!targetdir.exists) targetdir.mkdir()
	else if (!targetdir.isDirectory) error("%s is not a directory".format(targetdir))
	for (bundleSymName <- Option(jarAttributes.getValue("Bundle-SymbolicName"));

mikemckibben / ManagedReference.scala

Created December 18, 2012 17:59

lazy, resetable atomic reference

	class ManagedReference[T](private[this] val createF: => T, private[this] val closeF: Option[T => Unit] = None) {

	import java.util.concurrent.atomic.{ AtomicReference }

	private[this] val ref = new AtomicReference[Option[T]](None)

	def apply(): T = {
	val opt = ref.get
	val value = opt.getOrElse(createF)
	// test if ref was set by another thread between ref.get and opt.getOrElse

Michael McKibben mikemckibben