bug: Documentation for array loops is wrong

[rramsey]

bug: Documentation for array loops is wrong

[rramsey]

It might not hurt to show a more complicated example as well. Say you are looping through an array of data and you don't know what fields are present and you are building a table from the data. You might do something like this. Assuming you have an array of objects and each object has the same properties, but since you are making a generic html element, you don't know in advance what those properties are.

const unknownProps = Object.keys(dataSource[0]);

return 
  <table>
    <thead>
      <tr>
        { unknownProps.map( p => {
            return (<th>{p}</th>);
          });
        }
      </tr>
    </thead>
    <tbody>
      {
        dataSource.map( data => {
          return ( 
            <tr>
              { 
                unknownProps.map( p => {
                  return { <th>{data[p]}</th>);
                })
              }
            </tr>
          )
        });
      }
    </tbody>
  </table>                  

I think that is right. Had to cut down my code to make it even more generic but that should build you a table whether your data looks like { first: 'Jane', last: 'Doe' } or { city: 'Beverly Hills', state: 'California', zip: '90210' } with the property names as the table header.