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.
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)
| module Duckling exposing (main) | |
| {-| This demo loads a convex shape and a mesh from the same OBJ file. | |
| - elm-physics is used for simulation | |
| - elm-3d-scene is used for rendering | |
| It is important to keep the convex shape as small as possible, because | |
| this affects the simulation performance. |
The Gilbert–Johnson–Keerthi (GJK) distance algorithm is a method of determining the minimum distance between two convex sets. The algorithm's stability, speed which operates in near-constant time, and small storage footprint make it popular for realtime collision detection.
Unlike many other distance algorithms, it has no requirments on geometry data to be stored in any specific format, but instead relies solely on a support function to iteratively generate closer simplices to the correct answer using the Minkowski sum (CSO) of two convex shapes.
| const glslify = require('glslify'); | |
| const path = require('path'); | |
| const assign = require('object-assign'); | |
| const defined = require('defined'); | |
| // This is the original source, we will copy + paste it for our own GLSL | |
| // const vertexShader = THREE.ShaderChunk.meshphysical_vert; | |
| // const fragmentShader = THREE.ShaderChunk.meshphysical_frag; | |
| // Our custom shaders |
I recently had several days of extremely frustrating experiences with service workers. Here are a few things I've since learned which would have made my life much easier but which isn't particularly obvious from most of the blog posts and videos I've seen.
I'll add to this list over time – suggested additions welcome in the comments or via twitter.com/rich_harris.
Chrome 51 has some pretty wild behaviour related to console.log in service workers. Canary doesn't, and it has a load of really good service worker related stuff in devtools.
| /*! (c) 2016 Andrea Giammarchi - MIT Style License */ | |
| // simple state-like objects handler | |
| // based on prototypal inheritance | |
| function State() {'use strict';} | |
| // States are serializable dictionaries | |
| // toJSON and toString are the only reserved keywords | |
| // every other name can be used as name (included __proto__) |
Should be work with 0.18
Destructuring(or pattern matching) is a way used to extract data from a data structure(tuple, list, record) that mirros the construction. Compare to other languages, Elm support much less destructuring but let's see what it got !
myTuple = ("A", "B", "C")
myNestedTuple = ("A", "B", "C", ("X", "Y", "Z"))
| defmodule MyApp do | |
| use Application | |
| def start(_type, _args) do | |
| import Supervisor.Spec, warn: false | |
| children = [ | |
| Plug.Adapters.Cowboy.child_spec(:http, MyApp.Router, [], [ | |
| dispatch: dispatch | |
| ]) |