使用基于标题搜索的JavaScript修改JSON对象

Question

我有一个ASP.Net隐藏字段，其中包含JSON格式的数据，如下所示

[
{
"RegionName": "USA",
"Contact": {
"LegalName": "somethinglegal",
"StreetAddress": "hello",
"City": "Test",
"State": "Test",
"Zip": "8888",
"Country": "USA",
"VAT": "VAT"
},
"EntityContact": {
"LegalName": "Test",
"Email": "[e-mail]",
"Phone": "9998887777"
}
},
{
"RegionName": "Mexico",
"Contact": {
"LegalName": "somethinglegal",
"StreetAddress": "hello",
"City": "Test",
"State": "Test",
"Zip": "33333",
"Country": "Mexico",
"VAT": "VAT"
},
"EntityContact": {
"LegalName": "Amex",
"Email": "[e-mail]",
"Phone": "9998887777"
}
}  
]

使用以下代码在Javascript中读取

var value = $('#countryInvoice')[0].defaultValue;

现在我想使用基于Region名称的javascript搜索这个JSON，并从隐藏字段中删除记录。所以我想删除美国的数据点，所以只有下面的

[    
{
"RegionName": "Mexico",
"Contact": {
"LegalName": "somethinglegal",
"StreetAddress": "hello",
"City": "Test",
"State": "Test",
"Zip": "33333",
"Country": "Mexico",
"VAT": "VAT"
},
"EntityContact": {
"LegalName": "Amex",
"Email": "[e-mail]",
"Phone": "9998887777"
}
}  
]

有人能告诉我如何在JQuery或Javascript中做到这一点吗。

感谢

Answer 1

//ES5
var res = value.filter(function(e) { return e["RegionName"] != "USA"; })
//ES6
var res = value.filter(e => e["RegionName"] != "USA")

注意：Arrow函数是ES6语法。

Answer 2

您只需要使用Array.prototype.filter()过滤掉它。

查看此处的MDN文档

下面的片段过滤掉了美国

let value = [{
"RegionName": "USA",
"Contact": {
"LegalName": "somethinglegal",
"StreetAddress": "hello",
"City": "Test",
"State": "Test",
"Zip": "8888",
"Country": "USA",
"VAT": "VAT"
},
"EntityContact": {
"LegalName": "Test",
"Email": "[e-mail]",
"Phone": "9998887777"
}
},
{
"RegionName": "Mexico",
"Contact": {
"LegalName": "somethinglegal",
"StreetAddress": "hello",
"City": "Test",
"State": "Test",
"Zip": "33333",
"Country": "Mexico",
"VAT": "VAT"
},
"EntityContact": {
"LegalName": "Amex",
"Email": "[e-mail]",
"Phone": "9998887777"
}
}
];
let newArray = value.filter(arr => arr.RegionName !== 'USA');
console.log(newArray);