jakubbarczyk

function getOwnPropertyTypes(val) {
  'use strict';

  if (val && typeof val === 'object') {
    return Object.getOwnPropertyNames(val)
      .reduce((obj, key) => Object.defineProperty(obj, key, { value: typeof val[key] }), {})
  }

  return {};
}

jakubbarczyk

'use-strict'

const api = 'https://api.magicthegathering.io/v1'

const dominariaPage1 = fetch(new Request(Resource(Page(1))))
const dominariaPage2 = fetch(new Request(Resource(Page(2))))
const dominariaPage3 = fetch(new Request(Resource(Page(3))))

Promise
  .all([dominariaPage1, dominariaPage2, dominariaPage3])

jakubbarczyk

function Freeze(constructor: Function) {
  Object.freeze(constructor);
  Object.freeze(constructor.prototype);
}

jakubbarczyk

function Seal(constructor: Function) {
  Object.seal(constructor);
  Object.seal(constructor.prototype);
}

jakubbarczyk

export const delay = milliseconds => new Promise(resolve => setTimeout(resolve, milliseconds));

jakubbarczyk

import { defer } from 'rxjs';
import { map } from 'rxjs/operators';

export const bufferMaxCount = (count = 0) => source => defer(() => {
  let buffer = [];

  return source.pipe(
    map(next => buffer = [next, ...buffer.slice(0, count - 1)])
  );
});

jakubbarczyk

export enum MouseButton {
  None = 0,
  Primary = 1,
  Secondary = 2,
  Auxiliary = 4,
  BrowserBack = 8,
  BrowserForward = 16
}

jakubbarczyk

const cities = new Map([
  ['MG', 'Belzante'],
  ['SP', 'Sampa'] 
]);

const getCity = city => cities.get(city) ?? 'Not found';

jakubbarczyk

const fetchWithRetries = async (url, options, retryCount = 0) => {
  const { maxRetries = 3, ...remainingOptions } = options;
  
  try {
    return await fetch(url, remainingOptions);
  } catch (error) {
    if (retryCount < maxRetries) {
      return fetchWithRetries(url, options, retryCount + 1);
    }

jakubbarczyk

if (!Object.prototype[Symbol.iterator]) {
  Object.prototype[Symbol.iterator] = function* () {
    for (let key in this) {
      yield this[key];
    }
  };
}