aykutyaman

const combineReducers = reducers => (state = {}, action) =>
  Object.keys(reducers).reduce((acc, key) => ({
    ...acc,
    [key]: reducers[key](state[key], action)
  }), {})

aykutyaman

const sum = ([x, ...xs]) => (
  xs.length === 0
    ? x
    : x + sum(xs)
);
console.log(sum([2, 4, 6])); // 12

const count = ([x, ...xs]) => (
  xs.length === 0
    ? 1

aykutyaman

const LinkedList = () => {
  let length = 0;
  let headNode = null;

  let Node = (element) => ({
    element,
    next: null,
  });

  let size = () => length;

aykutyaman

const express = require('express');
const xl = require('excel4node');

const app = express();

const makeReport = (request, response) => {
  const wb = new xl.Workbook();
  const ws = wb.addWorksheet('Ödenmiş Mesai Raporu');

  // Create a reusable style

aykutyaman

// reverse a string using stack data structure

const reverse = s => {
  let stack = [];
  let reversed = '';

  // push all characters of string to stack
  for (var i = 0; i < s.length; i++) {
    stack.push(s[i]);
  }

aykutyaman

const isOpening = (s, m) => m[s];
const isClosing = (s, m) => (
  Object.values(m).includes(s)
);
const isValid = (last, s, m) => (
  m[last] !== s
);

const balancedParens = s => {
  const mapping = {

aykutyaman

/**
 * Complexity Analysis
 * push: O(1)
 * pop: Amortized O(1), Worst-case O(n)
 * empty: O(1)
 * peek: O(1)
 */
function Queue() {
  var stack1 = [];
  var stack2 = [];

aykutyaman

class Child extends React.Component {
  greeting() {
    return 'hello world';
  }
}
class Parent extends React.Component {
  render() {
    return (
      <TheChild ref='foo' />
    )

aykutyaman

getCachedExpensiveComputation() {
  if (this._cachedSomeProp !== this.prop.someProp) {
    this._cachedSomeProp = this.prop.someProp;
    this._cachedComputation = doExpensiveComputation(this.prop.someProp);
  }
  return this._cachedComputation;
}

aykutyaman

<div>
  <CustomList items={this.props.items} />
  <ComplexForm props={this.props.complexFormProps} />
</div>