Method constructor

src/TableHeader.js:7–13

(props)

class TableHeader extends Component {
  constructor (props) {
    super(props);
    this.state = {
      asc: 0
    };
    this.onSort = this.onSort.bind(this);
  }

  onSort () {
    let asc = this.state.asc === 0 ? 1 : 0;