I have an cart object. I want to change the qty of a product in cart for which i have created a changeQty method inside which I am using filter method to find the respective product and then I am updating the qty.
let cart = [
{
id: 1,
title: "Product 1",
qty: 1
},
{
id: 2,
title: "Product 2",
qty: 1
},
]
const changeQty = (pid, qty) => {
cart = cart.filter(product => product.id === pid ? product.qty = qty : product)
console.log(cart);
}
changeQty(1, 0)
If I pass other than 0 it works properly. But if I pass 0 as quantity to the changeQty method the product get's removed from the cart.
According to my knowledge filter works based on the return value. But here I am assigning qty to product.qty. And also If I use map instead of filter I am geting 0 in place of that product. So my doubt is what does product.qty = qty returns ?
