const foods = [
{no:1, name: 'Brad', quantity: '10'},
{no:2, name: 'Egg', quantity: '50'},
{no:3, name: 'Milk', quantity: '5'},
]
const arr1 = [];
foods.forEach(function(food,index){
arr1[index] = { no: food.no, n: food.name, q: food.quantity };
});
console.log(arr1);
const arr2 = foods.map((food) => ({ no: food.no, n: food.name, q: food.quantity }));
console.log(arr2);