oleh-zaporozhets

  on(name, listener) {
    if (!this._events[name]) {
      this._events[name] = [];
    }

    this._events[name].push(listener);
  }

oleh-zaporozhets

  removeListener(name, listenerToRemove) {
    if (!this._events[name]) {
      throw new Error(`Can't remove a listener. Event "${name}" doesn't exits.`);
    }

    const filterListeners = (listener) => listener !== listenerToRemove;

    this._events[name] = this._events[name].filter(filterListeners);
  }

oleh-zaporozhets

  constructor() {
    this._events = {};
  }

oleh-zaporozhets

  emit(name, data) {
    if (!this._events[name]) {
      throw new Error(`Can't emit an event. Event "${name}" doesn't exits.`);
    }

    const fireCallbacks = (callback) => {
      callback(data);
    };

    this._events[name].forEach(fireCallbacks);

oleh-zaporozhets

class MyEventEmitter {
  constructor() {
    this._events = {};
  }

  on(name, listener) {
    if (!this._events[name]) {
      this._events[name] = [];
    }

oleh-zaporozhets

class MyEventEmitter {}

oleh-zaporozhets

const fs = require('fs');

const str = fs.readFileSync('./str.txt', 'utf8');

console.log('String length:', str.length);

console.log('---------');

function test() {
  console.time('Split speed');

oleh-zaporozhets

const fs = require('fs');

const str = fs.readFileSync('./str.txt', 'utf8');

console.log('String length:', str.length);

console.log('---------');

function test() {
  console.time('Call speed');

oleh-zaporozhets

const fs = require('fs');

const str = fs.readFileSync('./str.txt', 'utf8');

console.log('String length:', str.length);

console.log('---------');

function test() {
  console.time('Loop speed');

oleh-zaporozhets

const path = require('path');
const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');

module.exports = {
  mode: process.env.NODE_ENV,
  devtool: 'none',
  target: 'node',
  context: path.resolve(__dirname, 'src'),
  entry: 'index.ts',
  output: {