Transform an object to an array
state = { ingredients: { salad: 1, bacon: 1, cheese: 2, meat: 2 } }
const transformedIngredients = Object.keys(props.ingredients) .map(igKey => { return [...Array(props.ingredients[igKey])].map((_, i) => { return <BurgerIngredient key={igKey + i} type={igKey} /> }) });