I have following JSON struncture:

```
{
  "daypart": [
    {
      "dayOrNight": [
        null,
        "N",
        "D",
        "N",
        "D",
        "N",
        "D",
        "N",
        "D",
        "N",
        "D",
        "N"
      ]
    }
  ]
}

```

What i want to do is reach keys array inside `narrative` . But whenever I try to get those keys l get forecast `undefined` or forecast `[object Object]`

Code 

```
 async forcast(){
    this.http.get("xxxxxxxxxxxxxxx")

    .subscribe(data => {

      let f = data
      this.dforecast = f["daypart"]["narrative"]

      console.log("forecast "+ this.dforecast )

    })
  }

```