Some coding challenges for the AO front end team who are learning JavaScript

Sum calculator

// write a function that returns the sum of two numbers
// then modify it to...
// return the sum of three numbers
// then the first argument is an array of numbers
// then the first argument may or may not be an array
// then there are an unknown amount of numbers and arrays passed in

function add(...nums) {
    return nums.reduce((a,b) => a.concat(b), []).reduce((a,b) => a+b, 0);
}

add(5,4,[4,4,4,4,4,4,4,4,4,4,4,4],[10,10,10,10],3);