Arrays

// Creating an array with various data types
const myArray = [1, "hello", { key: "value" }, true];
  
// Accessing elements by index
const firstElement = myArray[0]; // 1
const secondElement = myArray[1]; // "hello"
  
// Modifying array elements
myArray[1] = "world"; // Changes the second element
  
// Adding elements to the end of the array
myArray.push("new element");
  
// Removing elements from the end of the array
myArray.pop(); // Removes "new element"
  
// Getting the length of the array
const arrayLength = myArray.length; // 3 (after removing "new element")
  
//displaying array
console.log(myArray)

const numbers = [1, 2, 3, 4, 5] //number array
const fruits = ["apple", "banana", "cherry"] //string array
const mixed = [1, "hello", true] // mixed array
  
//displaying complete array
console.log(numbers)
console.log(fruits)
console.log(mixed)

const numbers = new Array(1, 2, 3, 4, 5); //Number Array
const fruits = new Array("apple", "banana", "cherry"); //String Array
const mixed = new Array(1, "hello", true) // Mixed Array
  
//displaying complete array
console.log(numbers)
console.log(fruits)
console.log(mixed)

//initializing arrays
const numbers = []
const fruits = []
const mixed = []
  
//moving data by using different methods
numbers.push(2, 3)
fruits.push("apply")
mixed[0] = 1
mixed[1] = "Hello"
  
//displaying complete array
console.log(numbers)
console.log(fruits)
console.log(mixed)

//initializing array
const myArray = [1, 2, 3]
console.log(myArray) //diplaying at intialize stage
  
myArray.push(4) // Adds 4 to the end of the array
console.log("Adding 4 at last: \n", myArray) //displaying to confirm
  
myArray.unshift("an array") // Adding at beginning of the array
console.log("Adding 'an array' at start: \n", myArray) //displaying to confirm
  
myArray[2] = 15.51 //adding at 3rd position
console.log("Adding 15.51 at 2nd index: \n", myArray) //displaying to confirm
  
// Creates undefined "holes" in myArray because index=7 is not defined
myArray[8] = "Lemon";
console.log("undefined holes: \n", myArray)

const numbers = [0, 1, 2, 3, 4, 5, 6, 7] //initializing
console.log(numbers) //diplaying at intialize stage
  
numbers.pop() // Removes the last element (7)
console.log("Last Element 7 is removed: \n", numbers) //displaying to confirm
  
numbers.shift() // Removes the first element (0)
console.log("First Element 0 is removed: \n", numbers) //displaying to confirm
  
numbers.splice(2, 3) // start from 2nd index, delete 3 elements
console.log("Remove 3 elements from 2nd Index to onward (start counting from 2nd index): \n", numbers) //displaying to confirm

const numbers = [0, 1, 2, 3, 4, 5, 6, 7] //initializing
console.log(numbers) //diplaying at intialize stage
  
//removing and saving
const removedElement = numbers.splice(2, 3)
console.log("Removed Elements are: \n", removedElement) //displaying to confirm

//initializing array
const fruits = ["apple", "banana", "cherry"];
console.log(fruits) //diplaying at intialize stage
  
fruits[1] = "kiwi"; // Updates 1st indexed element to "kiwi"
console.log("kiwi instead of banana: \n", fruits) //displaying to confirm
  
fruits.splice(2, 1, "strawberry") //update 1 element from 2nd index
console.log("strawberry instead of cherry: \n", fruits) //displaying to confirm
  
fruits.splice(1, 2, "cherry", "mango") //update 2 elements from 1st index
console.log("cherry and mango instead of kiwi and strawberry: \n", fruits) //displaying to confirm

const numbers = [1, 2, 3];//1st array
const moreNumbers = [4, 5, 6];//second array
  
const combined = numbers.concat(moreNumbers); // Combines both arrays
  
console.log(combined)//display to confirm

//declaration
const numbers = [3, 1, 2, 10, 5, 0]//number array
console.log("Original Numeric Array:\n", numbers)//display
const chars = ["A", "Z", "H", "G", "E", "X"]//string array
console.log("Original String Array:\n", chars)//display
  
 // Reverses the order
numbers.reverse()
console.log("Reversed Numbers:\n", numbers)
  
//sorting string-data
chars.sort(); //by default: ascending order
console.log("Ascending:\n", chars)
  
//sorting number array
numbers.sort((a, b) => a - b); // ascending order
console.log("Ascending Number:\n", numbers)
  
//decending number array
numbers.sort((a, b) => b - a); // descending order
console.log("Descending Number:\n", numbers)

//const is used to declared array
const cars = ["Saab", "Volvo", "BMW"]
  
//displaying each element by using loop
for(let i=0; i<cars.length; i++)
console.log(cars[i])

//const is used to declared array
const cars = ["Saab", "Volvo", "BMW"]
  
//displaying each element by using loop
for(const arrayElement of cars) {
        console.log(arrayElement)
}

//const is used to declared array
const cars = ["Saab", "Volvo", "BMW"]
  
//displaying each element by using loop
cars.forEach((cars)=>{
        console.log(cars)
})

    const numbers = [1, 2, 3];
  
//each element will be squared, new array is squaredNumbers
const squaredNumbers = numbers.map((number) => number * number);
  
//display for confirmation
console.log(squaredNumbers)// Output will be [1, 4, 9]

const numbers = [1, 2, 3, 4, 5];
  
//finding data according to given condition and extract them
const evenNumbers = numbers.filter((number) => number % 2 === 0);
  
//display for confirmation
console.log(evenNumbers)// Output will be [2, 4]

const fruits = ["apple", "banana", "cherry"]
  
//finding data according to given condition and extract them
const searchResult = fruits.filter((fruit) => fruit.startsWith("a"))
  
//display for confirmation
console.log(searchResult)

const fruits = ["apple", "banana", "cherry"];
const index = fruits.indexOf("cherry")
if (index != -1) {
        console.log("Your data exists at index-", index)
}else{
        console.log("Doesn't exist")
}

const fruits = ["apple", "banana", "cherry"];
const index = fruits.includes("cherry")
if (index === true) {
        console.log("Data Exists")
}else{
        console.log("Sorry, Data Doesn't exist")
}

const numbers = [1, 2, 3, 4, 6]
const evenNumber = numbers.find((number) => number % 2 === 0);
if (evenNumber != undefined) {
        console.log("Your required data is:\n", evenNumber)
}else{
        console.log("Sorry, Data Doesn't exist")
}