Josh Burgess joshburgess

Must Read

Functional Programming for JavaScript People

An introduction to functional thinking with examples in JavaScript.
https://medium.com/@chetcorcos/functional-programming-for-javascript-people-1915d8775504#.p0hyzlyjq

The Perfect API

A soft, informal introduction to the Fantasy Land spec.
https://james-forbes.com/?/posts/the-perfect-api

React & Elm inspired frameworks in Swift

This is a curated list of iOS (Swift & ObjC) frameworks which are inspired by React and Elm.

Swift frameworks

React-inspired

ReactSwift by @ColinEberhardt
https://github.com/ColinEberhardt/ReactSwift

Candidates

JavaScript: Hand-written JavaScript.
Idris-codegen-es: Idris 1.0 with idris-codegen-es.
Idris (Official JS): Idris 1.0 with official JavaScript Codegen.
PureScript: Using Latest PureScript.
PureScript (Uncurried): Latest PureScript with Data.Function.Uncurry.
Idris (C): Idris 1.0 with C codegen on Windows x64.
C: Hand-written JavaScript, compiled with gcc 6.2.0, with Win64 settings and -O3.

After listening to the latest Magic Read-along episode "You should watch this" (which you should go listen to now) I got caught up thinking about Brian's idea of an Endomorphism version of Kleisli composition for use with Redux, it's actually a very similar model to what I'm using in my event framework for event listeners so I figured I'd try to formalize the pattern and recognize some of the concepts involved. IIRC Brian described the idea of a Redux-reducer, which is usually of type s -> Action -> s, it takes a state and an action and returns a new state. He then re-arranged the arguments to Action -> s -> s. He then recognized this as Action -> Endo s (an Endo-morphism is just any function from one type to itself: a -> a). He would take his list of reducers and partially apply them with the Action, yielding a list of type Endo s where s

type StringBool = "true"|"false";


interface AnyNumber { prev?: any, isZero: StringBool };
interface PositiveNumber { prev: any, isZero: "false" };

type IsZero<TNumber extends AnyNumber> = TNumber["isZero"];
type Next<TNumber extends AnyNumber> = { prev: TNumber, isZero: "false" };
type Prev<TNumber extends PositiveNumber> = TNumber["prev"];

Technical overview

A basic `Option` type

// Option.ts

// definition
export class None {
  readonly tag: 'None' = 'None'

Ramda	Sanctuary
`add(a, b)`	`add(b, a)`
`addIndex(f)`	``
`adjust(f, i, xs)`	``
`all(f, xs)`	``
`allPass(fs, x)`	`allPass(fs, x)`
`always(x)`	`K(x)`
`and(a, b)`	`and(a, b)`
`any(f, x)`	``

	;; Fira code
	(set-default-font "Fira Code")
	(let ((alist '((33 . ".\\(?:\\(?:==\\\|!!\\)\\\|[!=]\\)")
	(35 . ".\\(?:###\\\|##\\\|_(\\\|[#(?[_{]\\)")
	(36 . ".\\(?:>\\)")
	(37 . ".\\(?:\\(?:%%\\)\\\|%\\)")
	(38 . ".\\(?:\\(?:&&\\)\\\|&\\)")
	(42 . ".\\(?:\\(?:\\\\/\\)\\\|\\(?:\\[/]\\)\\\|[*/>]\\)")
	(43 . ".\\(?:\\(?:\\+\\+\\)\\\|[+>]\\)")
	(45 . ".\\(?:\\(?:-[>-]\\\|<<\\\|>>\\)\\\|[<>}~-]\\)")

	import React from 'react'
	import { render } from 'react-dom';
	import { Router, Route } from 'react-router-dom';
	import LazyRoute from 'lazy-route';

	const App = () => {
	render() {
	return (
	<Router>
	<Route