Question

我正在使用犀牛。我想使用变量来定义地图的键，如下所示：

var name = "Ryan";
var relationshipType = "brother";
var relatedName = "David";

var json = {
                "name": name,
                "relationships": {
                    relationshipType: relatedName
                }
           };

当我解析这个json，键＆＃34; relationshipType＆＃34;时，它是文字而不是定义的变量，它解析为＆＃34; brother＆＃34;。有什么想法吗？

＆＃34; relationshipType未被解析为＆＃34;兄弟＆＃34;，如下面的输出所示：

{
    "name": Ryan,
    "relationships": {
         relationshipType: David
    }
};

Answer 1

您可以使用bracket notation，就像这样

var grouped = from d in db.MyTable
          group d by new {
  User = d.User, 
  Date=d.Date.HasValue ? d.Date.Value.Date : (DateTime?)null} into g
  select new {User=g.Key.User, Date=g.Key.Date, Count=g.Count()};

如果您可以使用ES6语法，那么您可以像这样解决这个问题

var name = "Ryan";
var relationshipType = "brother";
var relatedName = "David";

var json = {
  "name": name,
  "relationships": {}
};

json[relationshipType] = relatedName;

console.log(json);

Example

如何在json对象中使用可变定义的键？

1 个答案: