Array & Objects

JavaScript File

    // Arrays & Methods
// Array is collection of elements stored in variable 

let arr = [22, 33, 54, true, 21, 'Helloarray', 37];
document.writeln("Accessing Array with indexes [0],[1],[2] ....
");
document.writeln(arr[0],arr[3],arr[5]);

document.writeln("

");


document.writeln("Checking array length : ", arr.length);

document.writeln("

");

let arr2 = [32, 40, 32, 55, 89, 54, 772];
// for (let i = 0; i < arr2.length; i++) {
//     document.writeln(arr2 ,"
");
    
// }
// How to iterate in array
for (const i of arr2) {
    document.writeln(i);
}
document.writeln("

");

// Array methods
document.writeln("
Array Methods 

");

let arr3 = [233, 431, 433, 654, 213, 689, 900];
for (const i of arr3) {
    document.writeln(i)
}
document.writeln("

");
document.writeln("Indexof method :", arr3.indexOf(43), "

");

document.writeln("Push method :",arr3.push(31),arr3.push(300), arr3, "

")

document.writeln("Pop method :",arr3.pop(), arr3, "
Remove one item from last

")

document.writeln("Slice method :",arr3.slice(2,5), arr3, "

")

// Spread Operator 
// To merge two arrays 
document.writeln("Spread Operator: ");
let a = [33, 14, 67, 87, 42];
let b = [93, 42, 57, 97, 65, ...a];
document.writeln(b);


// Rest Operator
// to store all arguments in parameter , basic examole of rest 



// Destructing Array & Objects 

JavaScript Output :