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@DrBoolean
DrBoolean / falg.js
Created December 15, 2015 18:19
F-algebra es2015
const daggy = require('daggy')
const {compose, curry, map, prop, identity, intersection, union} = require('ramda');
const inspect = (x) => { if(!x) return x; return x.inspect ? x.inspect() : x; }
// F-algebras
// Fix
// ============
// Fx is a simple wrapper that does almost nothing. It's much more useful in typed languages to check that we have a recursive f (Fix f)
@yelouafi
yelouafi / adt.js
Created April 24, 2015 11:31
Algebraic Data Types in javascript (see http://tech.pro/blog/6885/javascript-and-type-thinking)
function eachKey(obj, f) {
for(var key in obj) {
if( obj.hasOwnProperty(key) )
f(key, obj[key]);
}
}
function adtcase (base, proto, key) {
return (...args) => {
var inst = new base();
@sebmarkbage
sebmarkbage / Enhance.js
Last active July 8, 2026 08:56
Higher-order Components
import { Component } from "React";
export var Enhance = ComposedComponent => class extends Component {
constructor() {
this.state = { data: null };
}
componentDidMount() {
this.setState({ data: 'Hello' });
}
render() {
@Globegitter
Globegitter / gist:9d724b14342763f042ea
Last active August 29, 2015 14:15
Install node-sass on iojs
#This sets the environment variable for Fish shell (http://fishshell.com/). Change for bash/zsh.
set -g -x SKIP_SASS_BINARY_DOWNLOAD_FOR_CI true
cd node_modules
#If you are using ember-cli-sass first change your package.json to
#"ember-cli-sass": "git+https://github.com/aexmachina/ember-cli-sass#sources-content"
#and cd node_modules/ember-cli-sass/node_modules/broccoli-sass/node_modules/
rm -rf node-sass
git clone --recursive https://github.com/sass/node-sass.git
cd node-sass
@vesse
vesse / express-jwt.js
Last active October 3, 2024 10:52
Two Passport + JWT (JSON Web Token) examples
//
// Implementation using express-jwt middle
//
var express = require('express'),
ejwt = require('express-jwt'),
jwt = require('jsonwebtoken'),
passport = require('passport'),
bodyParser = require('body-parser'),
LocalStrategy = require('passport-local').Strategy,
BearerStrategy = require('passport-http-bearer').Strategy;
@paf31
paf31 / node-haskell.md
Last active February 24, 2026 02:10
Reimplementing a NodeJS Service in Haskell

Introduction

At DICOM Grid, we recently made the decision to use Haskell for some of our newer projects, mostly small, independent web services. This isn't the first time I've had the opportunity to use Haskell at work - I had previously used Haskell to write tools to automate some processes like generation of documentation for TypeScript code - but this is the first time we will be deploying Haskell code into production.

Over the past few months, I have been working on two Haskell services:

  • A reimplementation of an existing socket.io service, previously written for NodeJS using TypeScript.
  • A new service, which would interact with third-party components using standard data formats from the medical industry.

I will write here mostly about the first project, since it is a self-contained project which provides a good example of the power of Haskell. Moreover, the proces

@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
@lygaret
lygaret / index.js
Last active July 3, 2025 09:26
ES6 Quasi-Literal for JSX
define(function(require) {
var React = require('react');
var paramRegex = /__(\d)+/;
var parser = new DOMParser();
var errorDoc = parser.parseFromString('INVALID', 'text/xml');
var errorNs = errorDoc.getElementsByTagName("parsererror")[0].namespaceURI;
// turns the array of string parts into a DOM
// throws if the result is an invalid XML document.
@chenglou
chenglou / gist:40b75d820123a9ed53d8
Last active March 13, 2024 12:14
Thoughts on Animation

Interesting part (unmounting & API) is at the end if you're not interested in the rest =).

Stress Tests

This animation proposal is just an attempt. In case it doesn't work out, I've gathered a few examples that can test the power of a future animation system.

  1. Parent is an infinitely spinning ball, and has a child ball that is also spinning. Clicking on the parent causes child to reverse spinning direction. This tests the ability of the animation system to compose animation, not in the sense of applying multiple interpolations to one or more variables passed onto the child (this should be trivial), but in the sense that the parent's constantly updating at the same time as the child, and has to ensure that it passes the animation commands correctly to it. This also tests that we can still intercept these animations (the clicking) and immediately change their configuration instead of queueing them.

  2. Typing letters and let them fly in concurrently. This tests concurrency, coordination of an array of ch

@archie
archie / ParentChild.scala
Created December 13, 2013 22:42
Examples of testing Akka actor parent-child relationships, mostly based on findings from https://www.assembla.com/spaces/akka/tickets/3043#/activity/ticket:
package pc
import akka.actor.Actor
import akka.actor.Props
import akka.actor.ActorRef
import akka.actor.ActorRefFactory
class Parent extends Actor {
val child = context.actorOf(Props[Child], "child")
var ponged = false