Jassif Team Institution

let str = "HELLO WORLD";
str.charAt(0);     // returns H

let str = "HELLO WORLD";
str[0];           // returns H

var str = "       Hello World!        ";
alert(str.trim());

const fruits = ["Banana", "Orange", "Apple", "Mango"];

result = Array.isArray(fruits);

const numbers = [45, 4, 9, 16, 25];

numbers.forEach(myFunction);

const numbers1 = [45, 4, 9, 16, 25];
const numbers2 = numbers1.map(myFunction);

function myFunction(value) {
  return value * 2;
}

const numbers = [45, 4, 9, 16, 25];
const over18 = numbers.filter(myFunction);

function myFunction(value) {
  return value > 18;
}

const txt = '{"name":"John", "age":30, "city":"New York"}'

const myObj = JSON.parse(txt);

const myObj = {name:"John", age:30, city:"New York"};
const myJSON = JSON.stringify(myObj);

// Create an Object:
const person = {
  firstName: "John",
  lastName: "Doe"
};

// Create new Object
const man = Object.create(person);
man.firstName = "Peter";

// Create an Object
const person = {
  firstName: "John",
  lastName: "Doe",
  age: 50,
  eyeColor: "blue"
};

// Get the Keys
const keys = Object.keys(person);

// Create an Object:
const person = {
  firstName: "John",
  lastName : "Doe",
  language : "NO",
};

// Change a Property:
Object.defineProperty(person, "language", {
  value: "EN",
  writable : true,
  enumerable : true,
  configurable : true
});

var timInMSs = Date.now();

const d = new Date();
document.getElementById("demo").innerHTML = d.toISOString();

// Create an object:
const Person = {
  firstName: "John",
  lastName : "Doe",
  get fullName() {
    return this.firstName + " " + this.lastName;
  }
};

// Display data from the object using a getter:
document.getElementById("demo").innerHTML = Person.fullName;

const Person = {
  firstName: "John",
  lastName : "Doe",
  language : "NO",
  set lang(value) {
    this.language = value.toUpperCase();
  }
};

// Set an object property using a setter:
person.lang = "en";

// Display data from the object:
document.getElementById("demo").innerHTML = Person.language;

const person = {
  firstName:"John",
  lastName: "Doe",
  fullName: function () {
    return this.firstName + " " + this.lastName;
  }
}

const member = {
  firstName:"Hege",
  lastName: "Nilsen",
}

let fullName = person.fullName.bind(member);