whitelizard

function makeCircle(pos = [0, 0], r = 0) {
  let hits = 0;

  const obj = {
    pos,
    getR: () => r,
    getHits: () => hits,
    incHits: () => (hits += 1),
    area: () => r ** 2 * Math.PI,
    intersect: (circle) => {

whitelizard

const c1 = new Circle([2.5, 0], 1.5);
const c2 = new Circle([-2, 0], 2);

c1.area(); // -> 7.0685834705770345
c2.area(); // -> 12.566370614359172

c1.intersect(c2); // -> false
c1.getHits(); // -> 0

c1.pos[0] = 1;

whitelizard

function Circle(pos = [0, 0], r = 0) {
  this.pos = pos;
  let hits = 0;

  this.getR = () => r;
  this.getHits = () => hits;
  this.incHits = () => (hits += 1);
  this.area = () => r ** 2 * Math.PI;

  this.intersect = circle => {

whitelizard

const c1 = new Circle([2.5, 0], 1.5);
const c2 = new Circle([-2, 0], 2);

c1.area(); // -> 7.0685834705770345
c2.area(); // -> 12.566370614359172

c1.intersect(c2); // -> false
c1.hits; // -> 0

c1.pos[0] = 1;

whitelizard

class Circle {
  constructor(pos = [0, 0], r = 0) {
    this.pos = pos;
    this.radius = r;
    this.hitCount = 0;
  }

  get r() {
    return this.radius;
  }

whitelizard

const { parent: parentId } = item;
const { [parentId]: { types = [], name = 'Noname' } = {} } = items;

whitelizard

const parentId = item.parent;
const parent = parentId ? (items[parentId] || {}) : {};
const types = parent.types || [];
const name = parent.name || 'Noname';

whitelizard

// item and items are predefined
const parent = items[item.parent];
const types = parent.types;
const name = parent.name;

whitelizard

describe('publish/subscribe 3', () => {
  it('should send a message from publish to subscribe', async () => {
    let result;
    const [promise, resolve] = triggerPromise();
    subscribe('ch1', (msg) => {
      result = msg;
      resolve();
    });
    publish('ch1', 1);
    await asyncWithTimeout(promise);

whitelizard

const asyncWithTimeout = (promise, timeout = 900) =>
  Promise.race([
    promise,
    new Promise((_, reject) =>
      setTimeout(() => reject(Error('Async timeout')), timeout)
    ),
  ]);