react flat list code example

Example 1: how to use flatlist keyextractor

<FlatList 
  data={[{name: 'a'}, {name: 'b'}]} 
  renderItem={
    ({item}) => <Text>{item.name}</Text>
  } 
  keyExtractor={(item, index) => index.toString()}
/>

Example 2: flatlist like in reactjs

There is no specific component like it is in react-native to do this kind of stuff, so I usually just use map() to achieve this kind of things.

But if it is reusable you can surely create a List component for yourself so that you don't write map() function each time for the same list.

Kind of like this:

function Item(props) {
   return <li>{props.value}</li>;
}

function MyList(items) {
   return (
    <ul>
      {items.map((item) => <Item key={item.key} value={item} />)}
    </ul>
  );
}