jamarparris

The MIT License (MIT)
Copyright (c) 2013 Jamar Parris

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 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE S

ayamflow

// Add on element with overflow
-webkit-mask-image: -webkit-radial-gradient(white, black);

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

amcvitty

Password Autofill on a React Native Expo app

Developing an app to accompany our website, worried that we would lose people in the transition if they couldn't remember their password, we were looking to make our app do Password AutoFill, a feature in iOS.

A talk from WWDC introducing the feature: https://developer.apple.com/videos/play/wwdc2017/206/

It works well, but there were a few bumps in the road making it work for React Native on Expo, so here are some notes to help out.

Apple's docs are here: https://developer.apple.com/documentation/security/password_autofill and they say something like this:

Jayphen

// stores/location.ts

import { writable, derived } from "svelte/store";
import { beforeUpdate } from "svelte";

export interface LocationStore {
  current: Location | undefined;
  previous: Location | undefined;
}

EibrielInv

extends Node3D
# FABRIK for Skeletons in Godot4 based on https://github.com/joaen/EasyIK/blob/master/EasyIK/Assets/Scripts/EasyIK.cs

# Usage:
# - add the script to a node
# call the activate function
# fabrik.activate(bone_ids, skeleton, left_hand_target, left_hand_pole)
# bone_ids is an Array with the bone ids of the chain
# skeleton is the skeleton
# left_hand_target is a Node3D