rohit012

class Person {
  constructor(name = '', age = 0) {
    this.name = name;
    this.age = age;
  }
  
  getName() {
    return this.name;
  }
}

rohit012

var multiplyAndPrint = (num1, num2) => {
  let result = num1*num2;
  return result;
}

// no brackets or return is required if function has just one line
var square = num => return num*num;

rohit012

const person1 = 'Bob';
const person2 = 'Fred';

//using typical string concatenation
let oldConcatStr = 'We know that ' + person1 + ' is friends with ' + person2;

//using template strings
let newConcatStr = `We know that ${person} is friends with ${person2}`

rohit012

// without default params
var myFunc = function (value, options){
  var value = value || 0;
  var options = options || {};
    // do some stuff 
}

// with default params
var myFunWithDefaultParam = function (value = 0, options = {}){
  // do some stuff

rohit012

var bodyObj = {
  height: 16,
  width: 9,
  breadth: 20;
};

//without destructuring
var height = bodyObj.height;
var width = bodyObj.width;
var breadth = bodyObj.breadth;

rohit012

// rest param example

var multipleInputs = function (value, ...restParamValues ) {
    restParamValues.forEach( function(paramVal){
      // do something with paramVal
    });
}

rohit012

var state1 = {
  val1 : 'abc',
  val2: 'xyz'
};

var state2 = {
  val2 : 'mno',
  val3: 'xyz'
};

rohit012

var value1 = 100;
let value2 = 100;
{
  var value1 = 200
  let value2 = 200  
}

console.log(value1); // 200
console.log(value2); // 100

rohit012

var myPromise = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve(10);
  }, 1000);
});

// handler can't change promise, just value
myPromise.then((result) => {  
  console.log(result);
}).catch((err) => {

rohit012

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class TriesContacts {

	static class Node {
		HashMap<Character, Node> links = null;
		boolean isFinish;