robinpokorny

const subscriptNumber = (n) => n
  .toString(10)
  .split``
  .map((i) => Number.parseInt(i, 10))
  .map((i) => String.fromCharCode(0x2080 + i))
  .join``

const countBadges = (badges) => Array
  .from(
    [...new Intl.Segmenter().segment(badges)]

robinpokorny

const uuid7Re = /^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;

const parseUuid7Date = (uuid) => {
  if (typeof uuid !== `string` || !uuid7Re.test(uuid)) {
    throw new TypeError(`Expected UUIDv7. Received: ${String(uuid)} (${typeof uuid})`)
  }
  
  const timestampHex = uuid.slice(0, 13).replace(`-`, ``)
  const timestamp = Number.parseInt(timestampHex, 16)
  return new Date(timestamp)

robinpokorny

const uuid4to7 = (uuid, now = Date.now()) => {
  const ts = now.toString(16).padStart(12, `0`)

  return `${ts.slice(0, 8)}-${ts.slice(8)}-7${uuid.slice(15)}`
}

// generate new UUIDv7
uuid4to7(crypto.randomUUID())

// Conforms to example in the spec RFC9562 A.6

robinpokorny

/*
  =============================
   Railway Oriented Typescript
  =============================
               by @robinpokorny
*/

/* === 1. Union basics === */

const a: string | number = 42;

robinpokorny

#!/bin/bash
# Mirrors all GitHub repositories the current user has read access to.
# See license at the end of the file.

# Token from https://github.com/settings/tokens
OAUTH_TOKEN="<TODO TOKEN>"

# where should the files be saved
DIR="<TODO PATH>"

robinpokorny

/*
  =============================
   Railway Oriented Typescript
  =============================
               by @robinpokorny
*/

/* === 1. Union basics === */

const a: string | number = 42;

robinpokorny

// And you will know my name is TypeScript
// When I lay my Tagged Union upon thee
// by @robinpokorny

// 1. Union of literals
// The cornerstone of any nutritious breakfast.
type Burger1 = `McDonalds` | `BigKahuna`;

const brettsBreakfast1_1: Burger1 = `BigKahuna`;
const brettsBreakfast1_2: Burger1 = `Whooper`; // Caught

robinpokorny

const sum = (a, b) => a + b

const getMostProfitFromStockQuotes = (quotes, current = 0) => {
  if (quotes.length < 2) return current
  
  const max = Math.max(...quotes)
  
  const maxAt = quotes.indexOf(max)
  
  const left = quotes.slice(0, maxAt)

robinpokorny

export const enum InformationalResponse {
  Continue = 100,
  SwitchingProtocols = 101,
  Processing = 102,
  EarlyHints = 103,
}

export const enum Success {
  OK = 200,
  Created = 201,

robinpokorny

const words = ["hello", " ", "world"];

for (let i = 0; i <= words.length; i++) {
  const word = words[i];
  if (word.length <= 0) continue;
  words[i] = uppercaseFirstLetter(word.trim());
}

const titlecasedWords = words
  .filter(isNotEmpty)