faustienf

// Unility types begin

type Split<
  S extends string,
  Delimiter extends string
> = S extends `${infer Head}${Delimiter}${infer Tail}`
  ? [Head, ...Split<Tail, Delimiter>]
  : S extends Delimiter
  ? []
  : [S];

faustienf

#!/bin/bash

ssh-keygen -t ed25519 -f ~/.ssh/id_faustienf
touch ~/.ssh/config

echo "
Host faustienf.github.com
    HostName github.com
    User faustienf
    IdentityFile ~/.ssh/id_faustienf

faustienf

const createQueue = () => {
  let queue = Promise.resolve();
  return <T extends () => any>(task: T) => {
    queue = queue.then(() => task());
  };
};

const queue = createQueue();

// example

faustienf

declare const opaque: unique symbol;
type Opaque<T, OpaqueType> = T & { readonly [opaque]: OpaqueType };

// examples
type Timestamp = Opaque<number, 'Timestamp'>;
const timestamp: Timestamp = Math.random() // Type 'number' is not assignable to type 'Timestamp'

faustienf

let scrollWidth: null | number = null;

export const getScrollWidth = (): number => {
  if (scrollWidth !== null) {
    return scrollWidth;
  }

  const el = document.createElement('div');
  el.style.position = 'fixed';
  el.style.zIndex = '-1';

faustienf

import {
  createRef,
  useCallback,
  useRef,
  RefObject,
} from 'react';

type RefsMap<T> = Partial<Record<string, RefObject<T>>>;
type LinkRef<T> = (key: string) => RefObject<T>;

faustienf

// copy from https://github.com/microsoft/TypeScript/issues/13298#issuecomment-513813788

type Overwrite<T, S extends any> = {[P in keyof T]: S[P]};
type TupleUnshift<T extends any[], X> = T extends any ? ((x: X, ...t: T) => void) extends (...t: infer R) => void ? R : never : never;
type TuplePush<T extends any[], X> = T extends any
    ? Overwrite<TupleUnshift<T, any>, T & {[x: string]: X}>
    : never;

faustienf

const obj = {
    a: {
        b: {
            c: [1, 2, 3]
        },
        d: '',
        f: true,
    },
    g: {
        h: 2,

faustienf

interface CalendarDay {
    label: number;
    timestamp: number;
    isCurrentMonth: boolean;
}
type CalendarWeek = CalendarDay[];
type Calendar = CalendarWeek[];

/**
 * @example

faustienf

tplink archer t4u driver
https://askubuntu.com/questions/802205/how-to-install-tp-link-archer-t4u-driver