krisleech

Renew GPG key

Given that your key has expired.

$ gpg --list-keys
$ gpg --edit-key KEYID

Use the expire command to set a new expire date:

pchiusano

Take-home functional programming interview

This document is licensed CC0.

These are some questions to give a sense of what you know about FP. This is more of a gauge of what you know, it's not necessarily expected that a single person will breeze through all questions. For each question, give your answer if you know it, say how long it took you, and say whether it was 'trivial', 'easy', 'medium', 'hard', or 'I don't know'. Give your answers in Haskell for the questions that involve code.

Please be honest, as the interviewer may do some spot checking with similar questions. It's not going to look good if you report a question as being 'trivial' but a similar question completely stumps you.

Here's a bit more guidance on how to use these labels:

tonymorris

// https://groups.google.com/d/msg/scala-functional/NAMWgC90KLA/sU0rw7ceoQMJ

object ApplyUnapply {

import language.higherKinds // I laugh every time

/*

In order to define Prism, we must define:

aryairani

/**
 * Created by arya on 1/2/15.
 */

/*
scalaVersion := "2.11.4"

libraryDependencies += "com.ning" % "async-http-client" % "1.9.3"

libraryDependencies += "org.scalaz" %% "scalaz-concurrent" % "7.1.0"

tpolecat

import scalaz.{ Free, Coyoneda, Monad, ~>, State, NonEmptyList }
import scalaz.std.function._
import scalaz.syntax.monad._
import scalaz.effect.IO

import scala.util.Random

object freecoyo extends App {

  // An algebra of primitive operations in the context of a random number generator

donovanh

var gulp = require('gulp'),
    sass = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss = require('gulp-minify-css'),
    jshint = require('gulp-jshint'),
    uglify = require('gulp-uglify'),
    rename = require('gulp-rename'),
    clean = require('gulp-clean'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),

markhibberd

package argonaut.example

import argonaut._, Argonaut._
import scalaz._, Scalaz._

object UnionExample extends {

  sealed trait Thing
  final case class One(n: String, i: Int) extends Thing
  final case class Two(n: String) extends Thing

pchiusano

// FYI: some comments below refer to old version of this gist: https://gist.github.com/pchiusano/7894696/12201b92db57dff8ed6689fc55c15c3f1a136f86
package scalaz.stream

import scalaz.\/
import scalaz.concurrent.Task

object retries {

  def dropWhileUnlessAtEnd[I](f: I => Boolean): Process1[I,I] = {
    def go(prev: Option[I]): Process1[I,I] =

shajra

import concurrent.{ExecutionContext, Future => SFuture, Promise}                 
import util.Try                                                                                                 
                                                                                                                
import _root_.scalaz.\/                                                                                         
import _root_.scalaz.concurrent.{Task => ZTask}                                                                 
                                                                                                                
                                                                                                                
object Task {                                                                                                   
                                                                                                                
  def fromScala[A]                    

ms-tg

import scala.util.{Try, Success, Failure}

def f(s: String): Try[Int] = Try { s.toInt }
def g(i: Int): Try[Int] = Try { i * 2 }
def unit[T](v: T): Try[T] = Success(v)

//val v = "1" 
val v = "bad"
val m = Success(v)