title: react native converting array into string
body: <p>I am trying to print out array's value, converting into string in the description of  <code>mapview</code> marker. 
  when I put <code>&lt;Text&gt;nameList&lt;/text&gt;</code> inside of <code>return()</code> under <code>&lt;View style={styles.container}&gt;</code> is okay, but <code>description={nameList.toString()}</code> in  is just print out <code>{object,object}, {object,object}, {object,object}</code></p>
  
  <p>Please let me know how would I solve. </p>
  
  <pre><code>constructor(){
  super()
  this.state = {name: []}
  
  }
  
    componentDidMount(){
  
     return fetch('https://transportapi.com/v3/uk/bus/stop/6090282/live.jsonapp_id=8425e834&amp;app_key=a9de6fe50081ecf38d2e9c9d5f1a87e0&amp;group=route&amp;nextbuses=yes')
  .then((response) =&gt; response.json())
  .then((responseJson) =&gt; {
  for(var x in responseJson.departures){
  this.setState({ 
  state : this.state["name"].push(responseJson.departures[x][0])
  
  });
  }
  
  
  
     })
  .catch((error) =&gt; {
    console.error(error);
  });
    }
  
  
  
  
  render() {
  
  
  const info = this.state.name;
  const nameList = info.map(name =&gt;{
    return(
  
      &lt;Text key={name.line}&gt;{name.line}{name.aimed_departure_time}&lt;/Text&gt;
    ) 
  
  })
  
   return (
  
    &lt;View style={styles.container}&gt;
      &lt;MapView
  initialRegion={{
    latitude: 37.78825,
    longitude: -122.4324,
    latitudeDelta: 0.0922,
    longitudeDelta: 0.0421,
  }}
  &gt;
  
    &lt;MapView.Marker
     coordinate={{
     latitude: 37.78825,
    longitude: -122.4324,
     }}
     title={'Hello'}
     description={nameList.toString()}
  
     /&gt;
  
      &lt;/MapView&gt;
  
   &lt;/View&gt;
  
   }
  </code></pre>