Omer Goldberg Arieg419

## functionsInArray.js
const add = (x,y) => x + y;
const subtract = (x,y) => x - y;
const multiply = (x,y) => x * y;

const arrayOfFunctions = [add, subtract, multiply];

arrayOfFunctions.forEach(calculationFunction => console.log(calculationFunction(1,1))); // 2 0 1

## setTimeout.js
const timeout = () => {
    setTimeout(() => alert("WoW"), 1000);
}

## anonymousFunctionAsArgument.js
const jsonfile = require('jsonfile')

const file = '/tmp/data.json'
const obj = {name: 'JP'}

jsonfile.writeFile(file, obj, (err) => console.error(err))

## functionAsArgument.js
const jsonfile = require('jsonfile')

const file = '/tmp/data.json'
const obj = {name: 'JP'}

const errorLoggerFunction = (err) => console.error(err);

jsonfile.writeFile(file, obj, errorLoggerFunction)

## declarative.js
// triple the value of every item in a given array
const triple = (arr) => arr.map((currentItem) => currentItem * 3)

// sum all the elements in a given array
const sum = (arr) => arr.reduce((prev, current) => prev + current, 0)

## imperative.js
// triple the value of every element in a given array
const triple = (arr) => {
  let results = []
  for (let i = 0; i < arr.length; i++){
    results.push(arr[i] * 3)
  }
  return results
}

// sum all the elements in a given array

## index.html
<!DOCTYPE html>
<html>
<head>
  <script>
    const setCookie = (key,val,days_till_expiration) => {
      let d = new Date();
      d.setTime(d.getTime() + (days_till_expiration*24*60*60*1000));
      const expires = "expires=" + d.toGMTString();
      document.cookie = key + "=" + val + ";" + expires + ";";
    }

## setCookie.js
const setCookie = (key,val,days_till_expiration) => {
  let d = new Date();
  d.setTime(d.getTime() + (days_till_expiration*24*60*60*1000));
  const expires = "expires=" + d.toGMTString();
  document.cookie = key + "=" + val + ";" + expires + ";";
}

## getUserData.js
const getUserData = () => {
  let username = fetchCookie();
  if (username != "") {
    alert("Welcome again " + username);
  } else {
    username = prompt("Please enter your name:","");
    setCookie("username", username, 30);
  }
}

## fetchCookie.js
const fetchCookie = () => {
  const name = "username" + "=";
  const cookie_array = document.cookie.split(';');
  for(let i = 0; i < cookie_array.length; i++) {
      let c = cookie_array[i];
      if (c.indexOf(name) == 0) {
          return c.substring(name.length, c.length);
      }
  }
  return "";
	const add = (x,y) => x + y;
	const subtract = (x,y) => x - y;
	const multiply = (x,y) => x * y;

	const arrayOfFunctions = [add, subtract, multiply];

	arrayOfFunctions.forEach(calculationFunction => console.log(calculationFunction(1,1))); // 2 0 1
	const timeout = () => {
	setTimeout(() => alert("WoW"), 1000);
	}
	const jsonfile = require('jsonfile')

	const file = '/tmp/data.json'
	const obj = {name: 'JP'}

	jsonfile.writeFile(file, obj, (err) => console.error(err))
	// triple the value of every item in a given array
	const triple = (arr) => arr.map((currentItem) => currentItem * 3)

	// sum all the elements in a given array
	const sum = (arr) => arr.reduce((prev, current) => prev + current, 0)
	// triple the value of every element in a given array
	const triple = (arr) => {
	let results = []
	for (let i = 0; i < arr.length; i++){
	results.push(arr[i] * 3)
	}
	return results
	}

	// sum all the elements in a given array
	<!DOCTYPE html>
	<html>
	<head>
	<script>
	const setCookie = (key,val,days_till_expiration) => {
	let d = new Date();
	d.setTime(d.getTime() + (days_till_expiration2460601000));
	const expires = "expires=" + d.toGMTString();
	document.cookie = key + "=" + val + ";" + expires + ";";
	}
	const getUserData = () => {
	let username = fetchCookie();
	if (username != "") {
	alert("Welcome again " + username);
	} else {
	username = prompt("Please enter your name:","");
	setCookie("username", username, 30);
	}
	}
	const fetchCookie = () => {
	const name = "username" + "=";
	const cookie_array = document.cookie.split(';');
	for(let i = 0; i < cookie_array.length; i++) {
	let c = cookie_array[i];
	if (c.indexOf(name) == 0) {
	return c.substring(name.length, c.length);
	}
	}
	return "";