Question

Javascript please show me how to do these two exercises and comment so I can understand what's happening. Thank you.

// Execise #1

/*

Modify the function so that it returns the length of an array recursively, without using the .length property. Use recursion!

Hint: when you index outside of an array, it returns undefined

*/

function getLength(array, i = 0) {

}

// To check if you've completed the challenge, uncomment these console.logs!

// console.log(getLength([1])); // -> 1

// console.log(getLength([1, 2])); // -> 2

// console.log(getLength([1, 2, 3, 4, 5])); // -> 5

// Exercise #2

/*

Modify the function so that it returns true if a number is even (and false if it's not) assume input will be a positive integer Use recursion!

*/

function isEven(n) {

}

// To check if you've completed the challenge, uncomment these console.logs!

// console.log(isEven(0)); // -> true

// console.log(isEven(5)); // -> false

// console.log(isEven(10)); // -> true

Answer 1

PLEASE GIVE IT A THUMBS UP, I SERIOUSLY NEED ONE, IF YOU NEED ANY MODIFICATION THEN LET ME KNOW, I WILL DO IT FOR YOU

function getLength(array) {
    return 0 in array ? 1 + getLength(array.slice(1)) : 0;
}

function isEven(n) {
    if (n === 0) return true;
    if (n === 1) return false;

    return isEven(n - 2);
}