var rawDataList =
[
{
"countDate": "2018-04-08",
"countNum": "5"
},
{
"countDate": "2018-04-18",
"countNum": "2"
},
{
"countDate": "2018-04-23",
"countNum": "7"
}
]
这样的一个json数组,怎么能根据countNum的value值删除某一项,并返回一个新数组呢?