Arturszott

class QNode {
  constructor(value) {
    this.val = value;
    this.next = null;
  }
}

class MyQueue {
  constructor() {
    this.head = null;

Arturszott

import { useState, useCallback, useMemo, useEffect } from 'react';
import { useMutation } from '@apollo/client';

const INITIAL_DATA_VALUE = undefined;
const useResetableMutation = (query, options) => {
  const [customData, setCustomData] = useState(INITIAL_DATA_VALUE);
  const customOptions = useMemo(() => {
    const onCompleted = (responseData) => {
      setCustomData(responseData);
      options && options.onCompleted && options.onCompleted(responseData);

Arturszott

// thunk based action creator example, cannot be tested while calling mapDispatchToProps beside checking if dispatch was called
function saveScore (score) {
  return (dispatch) => {
    fetch('/scores', { method: 'POST', { score } })
      .then(() => {
        dispatch({ type: SAVE_SCORE_SUCCEEDED })
      })
  }
}