geelen

"Maybe Error" pattern in Typescript

TL;DR? 👉 Implementation.

Inspiration

So one of the things I've liked about working with Go is that you use multiple return values a lot, with early exits that work as a kind of guard:

func GetUserFromAuth(name string, auth Auth) (error, User) {

geelen

Cracking the Cryptic sudoku webapp helper

This just detects if you've made a clear error as you're solving something (only looks at the basic sudoku rules, nothing fancy):

To install, just open your developer console (⌘⇧I or Cmd Shift I, then select console) and paste in the source code below:

geelen

Example of FAB streaming.

1. Open https://www.youtube.com/watch?v=nqAvFx3NxUM
2. Paste the following in the terminal:

curl "https://despacito.glen.workers.dev/?https://gist.githubusercontent.com/geelen/779758741e57f717a93e7bff7f2a6c5f/raw/ac8eb260f7fd2130ff5b648b91924ce1262262b0/lyrics.vtt"

3. About 11 seconds into the video, hit enter.

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import { css } from 'styled-components'

type RulesDefn = {
  [k: string]: string
}

type TrainBuilder<T extends RulesDefn> = {
  [k in keyof T]: TrainBuilder<T>
} & {
  toString: () => string[]

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const someExpensiveOperation = async x => {
  await new Promise(resolve => setTimeout(resolve, 1000))
  return x.toUpperCase()
}

const PROXY_MEMO = Object.create(
  new Proxy(
    {},
    {
      get(_, handler) {

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type Query = {
  book(id: ID!): Book!
  author(id: ID!): Author!
}

type Book = {
  id: ID!
  name: String
  author: Author
}

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root@vps190992:~/go/bin# ./hey https://serverless-ssr.now.sh/ssr/preact

Summary:
  Total:	14.7408 secs
  Slowest:	6.9887 secs
  Fastest:	0.2357 secs
  Average:	1.9901 secs
  Requests/sec:	13.5678

geelen

(async () => {
    const rows = 44
    const cols = 36
    const fps = 12
    const gif = "http://i.imgur.com/ifR7csn.gif"
    const rotate = false
    const mirror = false
    const vertmirror = false

    document.body.innerHTML = ''

geelen

(async () => {
    const cols = 44
    const rows = 36

    const size = 90
    const speedX = 0.02
    const speedY = 0.0

    const loadImage = url => {
        const img = document.createElement('img')

geelen

const chain = rules => {
  class ChainLink {
    constructor(rules) {
      this.rules = rules;
    }

    toString() {
      return this.rules
    }
  }