JavaScript generate random number except some values

Question

I\'m generating random numbers from 1 to 20 by calling generateRandom(). How can I exclude some values, say 8 and 15?

function generateRandom(mi         


        

Answer 1

Here is a slightly modified answer that is similar to all the others but it allows your to pass a single or an array of failing numbers

function generateRandom(min, max, failOn) {
    failOn = Array.isArray(failOn) ? failOn : [failOn]
    var num = Math.floor(Math.random() * (max - min + 1)) + min;
    return failOn.includes(num) ? generateRandom(min, max, failOn) : num;
}