Javascript Array.filter 工作不正常
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Array.filter is not working properly
提问by Pranav C Balan
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.
我有一个数组，我想从中删除我使用过的记录，Array.filter()但它返回的数组与原来的数组相同。
My Code:
我的代码：
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));
回答by Pranav C Balan
You need to return trueor falsein filter in order to filter data from an array, Return true to keep the element, false otherwise. So you can do something like this using filter()
您需要 returntrue或falsein filter 以从数组中过滤数据，返回 true 以保留元素，否则返回 false。所以你可以使用filter()
newCart = Cart.filter(function(item) {
return parseInt(item.orderId, 10) != parseInt(orderId, 10);
});
