Array.filter 工作不正常

Question

I have an array and i want to remove a record from it i have use Array.filter() but its return same array as it is.

My Code:

var url = window.location.pathname,
    orderId = url.split('/').slice(-2)[0];
var Cart = JSON.parse(localStorage.getItem('Cart'));
newCart=Cart.filter(function(item) {
    if (parseInt(item.orderId) == parseInt(orderId)) {
        return {};
    }
    else
    {
        return item;
    }
});
localStorage.setItem('Cart',JSON.stringify(newCart));

Answer 1

You should return true or false in the filter in order to filter data from an array.
Return true to add the element in the filtered list, false otherwise.
So you can do something like this using filter()

newCart = Cart.filter(function(item) {
    return parseInt(item.orderId, 10) != parseInt(orderId, 10);
});