lior-amsalem

//localStorage.js
export const loadState = () => {
   try {
     const serializedState = localStorage.getItem('state');
     if (serializedState === null) {
       return undefined;
     }
     return JSON.parse(serializedState);
   } catch (err) {
     return undefined;

lior-amsalem

/**
This is for educational purpose only and for fun.
*/

class customPromise {
  constructor(functionToResolve) {
    this.status = "pending";
    this.onFulfilledCallbacks = [];
    this.onRejectedCallbacks = [];

lior-amsalem

let cache = {};

var yourself = {
    fibonacci : function(n) {
        if (n === 0) {
            return 0;
        } else if (n === 1) {
            return 1;
        } else {
            let r = cache[n] = cache[n] ? cache[n] : this.fibonacci(n - 1) +

lior-amsalem

/**
Examples
"the-stealth-warrior" gets converted to "theStealthWarrior"
"The_Stealth_Warrior" gets converted to "TheStealthWarrior"
**/
function toCamelCase(str){
  return str.replace(/[-_][a-zA-Z]/g, (i) => i.replace(/[-_]/g,'').toUpperCase());
}

lior-amsalem

/**
solution('XXI'); // should return 21
**/

const helper = {
'I': 1,
'V': 5,
'X': 10,
'L': 50,
'C': 100,

lior-amsalem

/**
list([ {name: 'Bart'}, {name: 'Lisa'}, {name: 'Maggie'} ])
// returns 'Bart, Lisa & Maggie'
**/

function list(names){
  let formatNames = '';
  
  names.map((a,b) => (b < names.length-2) ? formatNames += a.name + ', ' : ((b === names.length-2) ? (formatNames += a.name + ' & ') : (formatNames += a.name)))
  

lior-amsalem

/**
array = [[1,2,3],
         [4,5,6],
         [7,8,9]]
snail(array) #=> [1,2,3,6,9,8,7,4,5]
**/
snail = function(array) {

  let results = [],
    botArray = [];

lior-amsalem

/**
var result = solution("apples, pears # and bananas\ngrapes\nbananas !apples", ["#", "!"])
// result should == "apples, pears\ngrapes\nbananas"
**/

function solution(input, markers) {
  return input.replace(new RegExp('(\\s?['+markers.join('?') + '?' + '\-?]\\s?)(.*)','gm'),'');
}

lior-amsalem

/**
generateBC("mysite.com/pictures/holidays.html", " : ") == '<a href="/">HOME</a> : <a href="/pictures/">PICTURES</a> : <span class="active">HOLIDAYS</span>'
**/

function generateBC(url, separator) {
  url = url.replace(/(http[s]?:\/\/[A-Za-z0-9]{3,}\.[A-Za-z]{2,})/g,'');
  let r = '',
    BC = ['/HOME'];

  BC.push(...url.match(/\/(?!index)([A-Za-z0-9-]+)/gi)||[]);

lior-amsalem

/**
Example:

Calculator().evaluate("2 / 2 + 3 * 4 - 6") # => 7
**/

const Calculator = function() {
    this.resolveMultiDivision = mathString => {
        var resolvedTop = mathString.replace(new RegExp(/(\d*\.?\d*)([\/\*])(\d*\.?\d*)/), (match, group1,group2,group3) => {
          return group2 === '*' ? group1 * group3 : group1 / group3;