imvpn22

const withCache = (fn, limit) => {
    const cache = {};
    const cacheQueue = new Array(limit);
    
    return (params) => {
        // console.log('cache', cacheQueue, cache)
        
        const key = fn.name + '$$' + JSON.stringify(params);
        
        if (cache.hasOwnProperty(key)) {

imvpn22

import React, { useRef } from "react";
import ReactDOM from "react-dom";

import "./styles.css";

const API_TOKEN = "MfwZLqWeh1YPrvrlULOqgzZfOlRkIR7r";
const BASE_URL = "https://api.giphy.com/v1/gifs/search?api_key=";
const SEARCH_URL = BASE_URL + API_TOKEN + "&q=";

/*

imvpn22

// Callback to Promise

const printMessage = (param, callback) => {
    console.log('Executing...', param);
    callback('err', {param: param, done: 'yes'});
}

const proisify = fn => params =>  new Promise((resolve, reject) => {
            fn(params, (err, data) => {
                if (err) reject(err);

imvpn22

// Implement a runOnlyOnce function

const runOnlyOnce = fn => {
    let flag = false;
    let result = null;
    
    return (...args ) => {
        if (flag) return result;
        result = fn(args);
        flag = true;

imvpn22

const str1 = 'my--name---is-vipin-'; // myNameIsVipin
const str2 = '---this-is-awesome----day---too'; // ThisIsAwesomeDayToo

const snakeToCamel = (str) => {
    const strArr = str.split(/-+/);
    const flag = str.startsWith('-')
    
    return strArr.map((st, i) => {
        let firstChar = st.charAt(0);

imvpn22

// Possible sum without neighbours

const arr = [4,1,5,7,2,3,8,6];
const arr2 = [1,1,1,4,1,2,4]

function maxSum(arr) {
    if (!arr.length) return 0;
    
    if (arr.length === 1) {
        return arr[0];

imvpn22

// Implement lodash cloneDeep

const a = {
	val: 1,
  prop: {
  	val2: 0,
  	val3: { name: 'a', condition: false, myArr: [1,2,3,4]}
  }
};

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const obj = {asdf: "jkl", num: 2, bool: false, subObj: {a: 1, b: true}, arr: [1, 'abc', true]};

const str = JSON.stringify(obj);
console.log(str);

const myStringify = (value) => {
    let str = '';
    if (typeof value === 'string') {
            str += '"' + value + '"';
        } else if (typeof value === 'number') {

imvpn22

const S = "timetopractice";
const P = "toc";

const P_arr = P.split('');
const matchedSubStr = [];

let i = 0;
let win = P.length;
while (i + win <= S.length) {
    const subStr = S.substring(i, i+win);

imvpn22

const romanMap = {
    1: 'I',
    2: 'II',
    3: 'III',
    4: 'IV',
    5: 'V',
    6: 'VI',
    7: 'VII',
    8: 'VIII',
    9: 'IX',