ttesmer

{-# LANGUAGE TypeSynonymInstances #-}
data Dual d = D Float d deriving Show
type Float' = Float

diff :: (Dual Float' -> Dual Float') -> Float -> Float'
diff f x = y'
  where D y y' = f (D x 1)

class VectorSpace v where
  zero  :: v

steveruizok

export class Cache<T extends object, K> {
	items = new WeakMap<T, K>()

	get<P extends T>(item: P, cb: (item: P) => K) {
		if (!this.items.has(item)) {
			this.items.set(item, cb(item))
		}
		return this.items.get(item)!
	}

redbar0n

What if you could have vertically sliced MVC-widgets, that looked something like this?

Using React and XState.

//  A vertically sliced "MVC-widget"

//  VIEW:

export default function Users() {

pesterhazy

So you want to write a sync system for a web app with offline and realtime support? Good luck. You might find the following resources useful.

Overview articles

• Database in a browser, a spec (Stepan Parunashvili)

  What problem are we trying to solve with a sync system?

• The web of tomorrow (Nikita Prokopov)

nateraw

"""
Built on top of this gist by @karpathy:
https://gist.github.com/karpathy/00103b0037c5aaea32fe1da1af553355

stable diffusion dreaming over text prompts
creates hypnotic moving videos by smoothly walking randomly through the sample space

example way to run this script:
$ python stable_diffusion_walk.py --prompts "['blueberry spaghetti', 'strawberry spaghetti']" --seeds 243,523 --name berry_good_spaghetti

s3cur3

defmodule AppServerWeb.Telemetry do
  require Logger

  @doc """
  Attaches an event handler to the "handled in" event on your Phoenix Channels.

  Call from within your application.ex initialization.
  """
  def attach_telemetry_handlers() do
    channel_handled_in = [:phoenix, :channel_handled_in]

marcoarment

<?php
/*
A simple PHP class to perform basic operations against Amazon S3 and compatible
services. Requires modern PHP (7+, probably) with curl, dom, and iconv modules.

Copyright 2022 Marco Arment. Released under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights

samselikoff

Remix's useFetcher doesn't return a Promise for any of its methods (like fetcher.submit()) because Remix doesn't want you to explicitly await anything so they can handle things like cancellation for you. Instead, they recommend adding a useEffect and performing whatever logic you need to after the fetcher is in a particular state.

I found using an effect to run some logic after a submission to be too indirect, and there seem to be plenty of cases where you want to submit a form and then perform some other work on the client (sometimes async, like requesting the user's permission for their location), and I'd rather just do that after a submission in the event handler rather than an effect.

So here's a proof of concept hook that wraps Remix's useFetcher and returns a version of submit that is a promise, and resolves with the data from the action:

function useFetcherWithPromise() {
  let resolveRef = useRef();
  let promiseRef = useRef();

chriseidhof

import SwiftUI

struct MyValue: _ViewTraitKey {
    static var defaultValue: Int = 0
}

extension View {
    func myValue(_ value: Int) -> some View {
        _trait(MyValue.self, value)
    }

BigZaphod

//
// A Swift property wrapper for adding "indirect" to struct properties.
// Enum supports this out of the box, but for some reason struct doesn't.
//
// This is useful when you want to do something recursive with structs like:
//
// struct Node {
//   var next: Node?
// }
//