willf

object GOption {
  def some[A](a: A): GOption[A] = new GOption[A] { 
    def cata[B](n: => B, s: A => B): B = sys.error("Implement me") 
  }
  def none[A]: GOption[A] = new GOption[A] { 
    def cata[B](n: => B, s: A => B): B = sys.error("Implement me") 
  }
}

trait GOption[+A] {

willf

object SalaryWorld extends App {

  val rules = Seq(
    ('allowance, 1.2),
    ('bonus, 1.1),
    ('tax, 0.7),
    ('surcharge, 0.9)
  )

  def salary(config: Set[Symbol], base: Double) =

willf

class FizzBuzz

  private

  @@pairs = [
    [3, "fizz"],
    [5, "buzz"]
  ]

   def self.strings_for(n)

willf

require 'net/http'

def resolve(uri_str,limit=5)
  $stderr.puts("Resolving #{uri_str}")
  limit.times do |i|
    uri = URI.parse(uri_str)
    raise "No host given #{uri_str}" unless uri.host 
    http = Net::HTTP.new(uri.host, uri.port)
    request = Net::HTTP::Head.new(uri.request_uri)
    response = http.request(request)

willf

class Array 
  # split array into groups up to n items, randomly choosing the size.  
  def split_random(n)
    size == 0 ? self : (size == 1 ? [self] : self[1..-1].reduce([[self[0]]]){|ll, elt| (rand(n)==(n-1) || ll[-1].size==n) ? ll + [[elt]] : ll[0..-2] + [ll[-1] +[elt]]}) 
  end
end

willf

class Array
  def split_random(n)
    def td(n)
      [take(n),drop(n)]
    end
    
    def split_random_acc(n,l, acc)
      head,tail = l.td(rand(n)+1)
      return (acc + [head]) if tail==[]
      split_random_acc(n, tail, acc + [head])

willf

/** 
 * From a file that contains
 * doc_id w1 w2 w3 ... lines, separated by tabs
 * return an inverted index Map of w -> Set(doc_id) 
 * 
 * @param filename well isn't it obvious
 * @return Map[String,Set[String]]
 */
import scala.collection.immutable.Map

willf

/** 
 * From a file that contains
 * doc_id w1 w2 w3 ... lines, separated by tabs
 * return an inverted index Map of w -> Set(doc_id) 
 * 
 * @param filename well isn't it obvious
 * @return Map[String,Set[String]]
 */
import scala.collection.immutable.Map

willf

scala> new BasicDBObject().get("missing")   => java.lang.Object = null
scala> new BasicDBObject().getBoolean("missing") => Boolean = false
scala> new BasicDBObject().getDouble("missing") throws java.lang.NullPointerException
scala> new BasicDBObject().getInt("missing") throws java.lang.NullPointerException
scala> new BasicDBObject().getLong("missing") throws java.lang.NullPointerException
scala> new BasicDBObject().getString("missing") => java.lang.String = null

willf

require 'rubygems'
require 'tweetstream'
require 'date'

TweetStream.configure do |config|
  config.consumer_key = '<your key>'
  config.consumer_secret = '<your secret>'
  config.oauth_token = '<your token>'
  config.oauth_token_secret = '<your token secret>'
  config.auth_method = :oauth