inanna-malick

//todo: use vector, scala 2:10 generic extractors. Currently using 2.9, so List has better pattern matching support
type Row = List[Option[Int]]


def shiftR(r: Row): Row = r.foldRight(Nil: Row){ 
  case (None, acc) => acc
  case (Some(x), Some(a)::as) if a == x => Some(a + x)::as
  case (Some(x), acc) => Some(x)::acc
}.padTo(4, None)

inanna-malick

case class Trie(v: Option[String], m: Map[Char, Trie])

def addInner(t: Trie, s: List[Char], p: String): Trie = s match {
    case c::cs => Trie(t.v, t.m.updated(c, addInner(t.m.getOrElse(c, Trie(Some(p + c), Map.empty)), cs, p + c) ))
    case Nil => t
  }

def add(t: Trie, s: String): Trie = addInner(t, s.toList, "")

def findInner(t: Trie, s: List[Char]): Option[String] = s match {

inanna-malick

val rate = 200 millis
 
def throttled[T]: Flow[T, T] = {
  val tickSource = TickSource(rate, rate, () => () )
  val zip = Zip[T, Unit]
  val in = UndefinedSource[T]
  val out = UndefinedSink[T]
	PartialFlowGraph{ implicit builder =>
	  import FlowGraphImplicits._
	  in ~> zip.left  ~> Flow[(T,Unit)].map{ case (t, _) => t } ~> out

inanna-malick

How to install latest GHC 7.8.4 + cabal 1.22 on intel edison w/ ubi linux

ghc

ubilinux prerequisites

# for untar later
apt-get install bzip2
# probably all needed

apt-get install freeglut3 freeglut3-dev -y

inanna-malick

/*
run as a script using `scala flyweight.scala`
expected output:
  Serving CoffeeFlavour(Espresso) to table 121
  Serving CoffeeFlavour(Cappuccino) to table 121
  Serving CoffeeFlavour(Frappe) to table 552
  Serving CoffeeFlavour(Espresso) to table 96
  Serving CoffeeFlavour(Cappuccino) to table 3
  Serving CoffeeFlavour(Espresso) to table 3
  Serving CoffeeFlavour(Frappe) to table 3

inanna-malick

def fibonacci(number: Int): Int = {
  assert(number >= 0)

  @annotation.tailrec def inner(prev: Int, curr: Int, n: Int): Int =
    if (n < number) inner(curr, prev + curr, n + 1)
    else curr

  if (number == 0) 0
  else if (number == 1) 1
  else inner(0, 1, 1)

inanna-malick

# https://gist.github.com/oliversalzburg/a57a8b82dd8ec245f985

function _common_section
    printf $c1
    printf $argv[1]
    printf $c0
    printf ":"
    printf $c2
    printf $argv[2]
    printf $argv[3]

inanna-malick

//send messages via Pusher API in play 2.4
import play.api.libs.json.{ Writes, Json }
import play.api.libs.ws.{ WSResponse, WSClient }
import play.api.libs.ws.ning.NingWSClient
import java.security.MessageDigest
import java.math.BigInteger
import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec
import scala.concurrent.{ ExecutionContext, Future }

inanna-malick

scala> val f: Function[Int, Int] = { n => n + 1 }
f: Function[Int,Int] = <function1>

scala> val f: Function[Int, Int] = { case n => n + 1 }
f: Function[Int,Int] = <function1>

scala> val pf: PartialFunction[Int, Int] = { n => n + 1 }
<console>:10: error: type mismatch;
 found   : Int => Int
 required: PartialFunction[Int,Int]

inanna-malick

" install plugins. (requires running :PlugInstall)
" Specify a directory for plugins (for Neovim: ~/.local/share/nvim/plugged)
call plug#begin('~/.vim/plugged')
	" Make sure you use single quotes

	Plug 'altercation/vim-colors-solarized'
	Plug 'scrooloose/nerdtree'
	Plug 'scrooloose/nerdcommenter'
	Plug 'scrooloose/syntastic'