如何在TypeScript Angular 2中将Json对象数组映射到另一个Plain json对象

Response Body;

响应机构;

[
  {
    "professionalId": {
      "cib_code": "30003",
      "thirdPartyId": "RS30004"
    },
    "nationalIdentifier": "984538926",
    "nationalIdType": "SIREN"
  },
  {
    "professionalId": {
      "cib_code": "30003",
      "thirdPartyId": "RS30008"
    },
    "nationalIdentifier": "944316926",
    "nationalIdType": "SIREN"
  }
]
[
  {
    "professiona