无法从Angular上的购物车中删除商品

Question

I need to delete all the added to cart items by pressing button clear. I started to write a function but it refused to work. I consider the mistake is that I didn't push items to cart. How can I do these 2 things ? Anyway, if you see any mistakes, please, mention.

angular.module('TransactionApp', [])
    .controller('TransactionsCtrl', function($scope) {
        $scope.title = 'Add to cart';

        $scope.itemsArray = [{
                price: 50,
                name: "Whey protein",
                img: 'img/item-1.png',
                quantity: 0
            },
            {
                price: 60,
                name: "Protein bar",
                img: 'img/item-1.png',
                quantity: 0
            },
            {
                price: 35,
                name: "BCAA",
                img: 'img/item-1.png',
                quantity: 0
            },
            {
                price: 50,
                name: "Whey protein",
                img: 'img/item-1.png',
                quantity: 0
            },
            {
                price: 60,
                name: "Protein bar",
                img: 'img/item-1.png',
                quantity: 0
            },
            {
                price: 80,
                name: "BCAA",
                img: 'img/item-1.png',
                quantity: 0
            }

        ];

        $scope.addTo = function(item) {
            item.quantity += 1;
        }

        $scope.getCost = function(item) {
            return item.quantity * item.price;

        }

        $scope.cart = [];

        $scope.getTotal = function() {
            return $scope.itemsArray.reduce((a, b) => a + b.price * b.quantity, 0);
        }

        $scope.clearCart = function() {
            return $scope.cart.length = 0;
        };
    });

Answer 1

Juse reset the items in the array,

   $scope.cart = [];

you do not need to return anything, and you can get the count by using length.

Answer 2

should be

$scope.clearCart = function() {
  $scope.cart = [];
};

Answer 3

To make it empty use following:

$scope.cart = [];

or to reduce one by one:

$scope.cart.slice(start, end);//start is an index from where you want to delete and the end is number which represents how many to delete.

To insert something on the array at last index, you do require to push:

$scope.cart.push(item);