How to produce an array from an object where the number of elements is determined by Object.values?

Question

I have an object like so:

{ green: 2, blue: 1, red: 2}

How can I turn it into an array that looks like this:

[ \'green\', \         


        

Answer 1

Using map and flat if you don't want to use flatMap directly

const obj = { 
   green: 2, 
   blue: 1, 
   red: 2
};

const responseArray = Object.entries(obj)
    .map(([key,value]) => {
        return Array(value).fill(key)
}).flat();

console.log(responseArray);
//  ["green", "green", "blue", "red", "red"]