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 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

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

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

  let size = () => length;

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

aykutyaman

// isValid -> Date -> Bool
const isValidDate = d => d instanceof Date && !isNaN(d.getTime())

aykutyaman

// it works only with strings
const isPalindrome = ([head, ...tail]) => {
   if (tail.length === 0) return true
   if (head !== tail[tail.length - 1]) return false
 	 
   return isPalindrome(tail.slice(0, tail.length - 1))
}

aykutyaman

const sumUntil = (a, target) => 
	[...a].reduce((acc, n, _, arr) => n === target ? (arr.length = 0, acc) : acc + n)
  
  sumUntil([1, 2, 3, 36, 4], 36) // 6

aykutyaman

[
  'Ankara',
  'Milano',
  'Berlin'
]

aykutyaman

const http = require('http')

const Countries = [
  'Turkey', 'Italy', 'Germany'
]

const app = http.createServer((req, res) => {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.writeHead(200, { 'Content-Type': 'application/json' })
  res.end(JSON.stringify(Countries));