puffnfresh

// Polyfill for Object.create
function create(proto) {
    function Ctor() {}
    Ctor.prototype = proto;
    return new Ctor();
}

// Always returns an instance of constructor
function getInstance(self, constructor) {
    return self instanceof constructor ? self : create(constructor.prototype);

vmarquez

case class GenericCache[A[_,_], B, C](instance: A[B,C], getf: B=>C, putf: (B,C)=>Unit) {
    def retrieve(b: B) = getf(b)
    def insert(b: B, c: C) = putf(b,c)
}

//Notice how neither cache implementations have to even be aware of the existnace of the typeclass. much more flexible than inheritance
class FastCache[A,B] {
    private var m = Map[A,B]() //excuse mutability for illustration purposes
    def add(a: A, b: B): Unit = {
        m = m + (a->b)

dwaq

How to program ATtiny13A with Arduino as ISP

---

Install WinAVR

http://winavr.sourceforge.net/

Set fuse bits

Determine what bits using http://www.engbedded.com/fusecalc

soc

I did a small project in C# recently, and I basically assumed
that coming from Scala I could enjoy all the benefits of a
(more) mainstream language and a polished, integrated
ecosystem.

Boy was I wrong.

My experience starts with installing Microsoft's latest Visual
Studio 2013 Express Desktop IDE which went really smooth.

cb372

Category theory jargon cheat sheet

A primer/refresher on the category theory concepts that most commonly crop up in conversations about Scala or FP. (Because it's embarassing when I forget this stuff!)

I'll be assuming Scalaz imports in code samples, and some of the code may be pseudo-Scala.

Functor

A functor is something that supports map.

aparrish

aparrish