Question

javascript中怎么删除对象中的数组

{ "Sid": "19", "Food": [ null, { "Pstandard": "1", "Pname": "天目山笋干烧肉", "SkuID": "15879572", "SkuName": "天目山笋干烧肉", "SkuPrice": "28", "SkuNum": 3 } ]}我用delete或重新赋值都会产生一个null或一个""。怎么才能测底删除？因为做购物车。空值没法算呀。

Answer 1

arr.splice(要删除或增加的元素的index, 要删除的元素的个数, 要增加的元素A, ..., 要增加的元素B) //返回所有被删除的元素组成的数组
arr.splice(1, 1) //删除第二个元素
另外要创建一个新对象推荐的写法是var obj = {}，同理的创建一个新数组推荐的写法是var arr = []

Answer 2

var obj = {
"Sid": "19",
"Food": [
null,
{
"Pstandard": "1",
"Pname": "天目山笋干烧肉",
"SkuID": "15879572",
"SkuName": "天目山笋干烧肉",
"SkuPrice": "28",
"SkuNum": 3
}
]
}

obj.Food.splice(0, 1);// array.splice(index, 1) 删除指定index元素