Hey, I'm trying to access my state in the handle toggle event. Right now, on line 10, 'tilesData' is only set to run this toggle of expanding/collapsing the card on position 0 of the array...

gistfile1.txt

export default class Cardz extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      tilesData: [
        {
          img: 'http://loremflickr.com/640/400/breakfast/all',
          title: 'Breakfast',
          author: 'jill111',
          featured: true,
          expanded: false,
        },
        {
          img: 'http://loremflickr.com/640/400/burger/all',
          title: 'Tasty burger',
          author: 'pashminu',
          expanded: true,

        },
        {
          img: 'http://loremflickr.com/640/400/camera/all',
          title: 'Camera',
          author: 'Danson67',
          expanded: false,

        },
        {
          img: 'http://loremflickr.com/640/400/morning/all',
          title: 'Morning',
          author: 'fancycrave1',
          featured: true,
          expanded: false,

        },
        {
          img: 'http://loremflickr.com/640/400/hats/all',
          title: 'Hats',
          author: 'Hans',
          expanded: false,
        },
        {
          img: 'http://loremflickr.com/640/400/honey/all',
          title: 'Honey',
          author: 'fancycravel',
          expanded: false,
        },
        {
          img: 'http://loremflickr.com/640/400/vegetables/all',
          title: 'Vegetables',
          author: 'jill111',
          expanded: false,
        },
        {
          img: 'http://loremflickr.com/640/400/plant/all',
          title: 'Water plant',
          author: 'BkrmadtyaKarki',
          expanded: false,
        },
      ]
    };
  }


  handleToggle(event, toggle) {
    var newState = update(this.state, {tilesData: {0: {expanded: {$set: toggle}}}})
    console.log(this.state.tilesData)

    this.setState(newState);
  };



  render() {
    return (
      <div>
      {this.state.tilesData.map((tile) => (
      <Card
        style={{flex: .5, flexDirection:'row'}}
        onClick={this.handleToggle.bind(this)}
        expanded={tile.expanded}
        onExpandChange={this.handleExpandChange}
        style={{width: '60%',
               marginLeft: '10rem'}}   >
        <CardHeader
          title={tile.title}
          subtitle={"Subtitle"}
          avatar="http://lorempixel.com/100/100/nature/"
          actAsExpander={true}
          showExpandableButton={true}
        />
        <CardText>

        </CardText>
        <CardMedia
          expandable={true}
          overlay={<CardTitle title="Overlay title" subtitle="Overlay subtitle" />}
        >
          <img src={tile.img} />
        </CardMedia>
        <CardTitle title="Card title" subtitle="Card subtitle" expandable={true} />
        <CardText expandable={true}>
          Lorem ipsum dolor sit amet, consectetur adipiscing elit.
          Donec mattis pretium massa. Aliquam erat volutpat. Nulla facilisi.
          Donec vulputate interdum sollicitudin. Nunc lacinia auctor quam sed pellentesque.
          Aliquam dui mauris, mattis quis lacus id, pellentesque lobortis odio.
        </CardText>
        <CardActions>
          <FlatButton label="Expand" onTouchTap={this.handleExpand.bind(this)} />
          <FlatButton label="Reduce" onTouchTap={this.handleReduce.bind(this)} />
        </CardActions>
      </Card>
    ))}


      </div>
    );
  }
}