Question

I’ve had trouble writing this code. I’m supposed to make a function that can take either an array of numbers or the arguments array and calculate the average without using a for or while loop. It says I have to use recursion. How do I do this?

Answer 1

I was able to finish it myself thanks to what you guys suggested. I was confused on how to go about the actual average calculation until after reading what you guys posted. If this code can be improved please tell! Thanks!

function mean( list, more ) {

    if ( more ) {

        list = [].slice.call( arguments );

    } else if ( !list || list[0] === undefined ) return;

    var a = list,
        b = list.length;


    return (function execute() {

        if ( !a.length ) return 0;

        return ( a.pop() / b ) + execute();

    })();

}