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@paf31
paf31 / memo.purs
Created December 16, 2014 01:47
Memoized functions in PureScript
module Main where
import Debug.Trace
import Data.Tuple
import Data.Either
import Data.Lazy
class Memo a where
memo :: forall r. (a -> r) -> a -> Lazy r
@alicebartlett
alicebartlett / Hiring-links.md
Last active November 26, 2018 03:41
A while ago I asked twitter for resources on hiring, here are some links:
@pfultz2
pfultz2 / state_monad.cpp
Created November 11, 2014 01:29
State monad implemented in C++14
#include <utility>
#include <iostream>
struct void_
{
template<typename Stream>
friend Stream &operator<<(Stream &s, void_)
{
return s << "()";
}
@btford
btford / chillax.md
Created October 30, 2014 06:59
Why you shouldn't worry so much about migrating with Angular

Several developers asked me about how difficult it will be to migrate Angular 1 to Angular 2. Angular 2 isn't done, so I legitimately have no idea how hard it will be. But there are a few high-level guiding principals in the design of Angular 1 that make adapting to changes like this fairly painless.

Angular 1 was designed so it would have a fairly minimal API surface. Let's look at controllers, since these are the meat of your app. Controllers are just functions that get passed other components as arguments:

MyController ($scope) {
  $scope.list = [];
  
  $scope.addItem = function (name) {
    $scope.list.push({
@evancz
evancz / Haskell-Style-Guide.md
Last active March 23, 2023 15:27
A style guide for Elm tools

Haskell Style Guide for Elm

Goal: a consistent style throughout all Elm projects that is easy to read and produces clean diffs to make debugging easier. This means valuing regularity and simplicity over cleverness.

Line Length

Keep it under 80 characters. Going over is not the end of the world, but consider refactoring before you decide a line really must be longer.

Variables

var Dialog = React.createClass({
render: function() {
// 1) render nothing, this way the DOM diff will never try to do
// anything to it again, and we get a node to mess with
return React.DOM.div();
},
componentDidMount: function() {
// 2) do DOM lib stuff
this.node = this.getDOMNode();
@JakeWharton
JakeWharton / AutoGson.java
Last active August 5, 2025 08:11
A Gson TypeAdapterFactory which allows serialization of @autovalue types. Apache 2 licensed.
import com.google.auto.value.AutoValue;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Marks an {@link AutoValue @AutoValue}-annotated type for proper Gson serialization.
* <p>
@david-christiansen
david-christiansen / FizzBuzzC.idr
Last active August 29, 2022 20:00
Dependently typed FizzBuzz, now with 30% more constructive thinking
module FizzBuzzC
%default total
-- Dependently typed FizzBuzz, constructively
-- A number is fizzy if it is evenly divisible by 3
data Fizzy : Nat -> Type where
ZeroFizzy : Fizzy 0
Fizz : Fizzy n -> Fizzy (3 + n)
@evancz
evancz / Architecture.md
Last active December 21, 2022 14:28
Ideas and guidelines for architecting larger applications in Elm to be modular and extensible

Architecture in Elm

This document is a collection of concepts and strategies to make large Elm projects modular and extensible.

We will start by thinking about the structure of signals in our program. Broadly speaking, your application state should live in one big foldp. You will probably merge a bunch of input signals into a single stream of updates. This sounds a bit crazy at first, but it is in the same ballpark as Om or Facebook's Flux. There are a couple major benefits to having a centralized home for your application state:

  1. There is a single source of truth. Traditional approaches force you to write a decent amount of custom and error prone code to synchronize state between many different stateful components. (The state of this widget needs to be synced with the application state, which needs to be synced with some other widget, etc.) By placing all of your state in one location, you eliminate an entire class of bugs in which two components get into inconsistent states. We also think yo
@gabrielemariotti
gabrielemariotti / AndroidManifest.xml
Last active April 4, 2023 11:15
Android Wear: Heart Rate and Samsung Gear Live. (basic example)
<!-- Declare the permission for body sensor -->
<uses-permission android:name="android.permission.BODY_SENSORS" />