hitrik

// Алгоритм "бегущего окна"
// Сложность - O(k*n), где n - длина массива, k - размер искомой последовательности
// Найти макс сумму из трех последовательных элементов в массиве

const arrInt = [1, 4, 7, 2, 34, 9, 0, 1, 5];

// функция принимает входной массив числел и какое кол-во элементов брать для подмассива
function findMaxSummSubArray(arr: number[], k: number) {
  // сделаем две переменных, одну для хранения суммы, вторая запишем длину входного массива
  let maxSum: number = 0;

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  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions

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  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions

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const startUserAuth = () => new Promise(res => setTimeout(res('qazzaq'), 1000))

const userMachine = Machine({
    id: 'user',
    context: {
        user: null,
        error: false
    },
    initial: 'idle',
    states: {

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const useAnimationUnmount = (duration = 300, useNativeDriver = true) => {
  const [animation] = useState(() => new Animated.Value(1));
  const [unmount, setUnmount] = useState(false);

  const start = useCallback(
    () =>
      Animated.timing(animation, {
        toValue: 0,
        useNativeDriver,
        duration,

hitrik

import React, { Component } from 'react';
import { render } from 'react-dom';
import {Subject, interval} from "rxjs";
import {takeUntil, tap} from "rxjs/operators";

//hook creates subject that will destroy on unmount component
const useDestroyedSubject = () => {
  const subject$ = new Subject();
  React.useEffect(() => () => {
    console.log("destroy subject");

hitrik

//wrapper for react tree with multi fetch
import React, { useState, useEffect, useMemo } from "react";

const apiUrl = `https://jsonplaceholder.typicode.com`;

const isValid = (checker, ...args) =>
  args.filter(checker).length === args.length;

const fetch = async ({ url, ...options }) => {
  try {

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//Reactjs custom hook
export const useFetch = ({ url, ...options = {} }) => {
  let [data, setData] = useState(null);
  const [error, setError] = useState(null);
  const [status, setStatus] = useState(null);
  const [loading, setLoading] = useState(true);
  const ref = useRef();

  useEffect(
    () => {

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/*
* Reactive wrapper for Socket.io powered by rxjs@6.2.0
*/

const io = require("socket.io");
const { pipe, of, fromEvent, timer } = require("rxjs");
const {
  map,
  merge,
  takeUntil,

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    //compose
    const compose = (...fns) => arg =>
      fns.reduce((composed, fn) => fn(composed), arg);

    //fetch all urls
    const fetchUrls = urls => urls.map(url => fetch(url));

    //parse body like json
    const parseResponses = responses =>
      responses.map(response => response.then(data => data.json()));