Concat/Push Object keys to Array

Question

I have the following problem to concat multiple object values into one Array!

My current code:

const coins = [];
Object.keys(prices).forEach((key) => {
    coins.push(prices[key]);
    console.log("prices", prices);
    console.log("prices[key]", prices[key]);
    console.log("coins", coins);
});

Output:

prices { ETH: { USD: 1332.03 }, BTC: { USD: 14602.09 } }
prices[key] { USD: 1332.03 }
coins [ { USD: 1332.03 } ]
prices { ETH: { USD: 1332.03 }, BTC: { USD: 14602.09 } }
prices[key] { USD: 14602.09 }
coins [ { USD: 1332.03 }, { USD: 14602.09 } ]

What needs to be achieved:

coins =  [ 1339.64, 14617.95 ]

I only need the values to do mathematical operations with them.

Answer 1

Pushing the USD property would do:

coins.push(prices[key].USD);

But you can do it better:

Object.values(prices).map(price => price.USD);

Answer 2

As stated in the comments, push the USD price in instead of the whole object:

 const coins = []; const prices = { ETH: { USD: 1332.03 }, BTC: { USD: 14602.09 } }; Object.keys(prices).forEach((key) => { coins.push(prices[key].USD); /* <- here is the change, add the key of the price */ console.log("prices", prices); console.log("prices[key]", prices[key]); console.log("coins", coins); });