const items = [
    { name: "Item1", price: 450 },
    { name: "Item2", price: 1500 },
    { name: "Item3", price: 350 },
    { name: "Item4", price: 2000 },
    { name: "Item5", price: 1200 },
    { name: "Item6", price: 300 }
];

const groupedItems = items.reduce((groups, item) => {
    // Define price ranges
    let groupKey = "";
    if (item.price < 500) {
        groupKey = "Under 500";
    } else if (item.price > 1000) {
        groupKey = "Above 1000";
    }

    // Add item to appropriate group
    if (groupKey) {
        if (!groups[groupKey]) {
            groups[groupKey] = [];
        }
        groups[groupKey].push(item);
    }

    return groups;
}, {});

console.log(groupedItems);


// json
{
    "Under 500": [
        { "name": "Item1", "price": 450 },
        { "name": "Item3", "price": 350 },
        { "name": "Item6", "price": 300 }
    ],
    "Above 1000": [
        { "name": "Item2", "price": 1500 },
        { "name": "Item4", "price": 2000 },
        { "name": "Item5", "price": 1200 }
    ]
}