Javascript 如何将Json数据放入变量2中？

在

params.value

中，我有3个数组，其中的名称需要放在一个变量中。我试着通过ForEach做，但是我做不到，怎么了

var roles = params.forEach(x => params.value.Name);
return roles;

{"Object":[{"TerritoryId":1,"TerritoryName":"Russia","FirmPieRotationRuleId":1,"FirmPieWorkedYears":0,"FirmPieCoolOff":5,"FirmPieRoles":[{"TeamRoleId":1,"Name":"Engagement Leader","MinCount":1,"MaxCount":1,"SortOrder":0},{"TeamRoleId":2,"Name":"Signing Partner","MinCount":1,"MaxCount":1,"SortOrder":0},{"TeamRoleId":3,"Name":"Engagement Manager","MinCount":1,"MaxCount":1,"SortOrder":0}],"StatutoryPieRotationRuleId":null,"StatutoryPieWorkedYears":null,"StatutoryPieCoolOff":null,"StatutoryPieRoles":[],"NonPieRotationRuleId":null,"NonPieWorkedYears":null,"NonPieCoolOff":null,"NonPieRoles":[]}],"Code":0,"ErrorMessage":null,"Errors":[]}

Array#forEach

不返回任何内容。尝试使用

Array#map

var roles = params.map(x => params.value.Name);

---

值是数组。试试这个：

var roles = params.value.map(val => val.Name)

虽然我使用了“import'rxjs/Rx'”；“@ValitskiyDmitriy
params
变量来自asynchro请求，但我有错误“params.map不是函数”？不，没有这样的请求。这是一个表，它与来自服务器的响应一起工作。对于合适的演讲者，它包含您需要的部分{headerName:“角色”，字段：“FirmPieRoles”，可编辑：true，cellEditorFramework:DropdownEditorComponent，cellEditorParams:{values:RolesDictionary}，cellRenderer:function（params）{var roles=params.map（x=>params.value.Name）；返回角色；}，@ValitskiyDmitriy它是有角度的吗？不管怎样，您传递给
cellRenderer
函数的参数是什么？