update state list with key and index react code example

Example 1: react native update state array of objects

let markers = [ ...this.state.markers ];
markers[index] = {...markers[index], key: value};
this.setState({ markers });

Example 2: react arrays

const numbers = [1, 2, 3, 4, 5];
const listItems = numbers.map((number) =>  <li>{number}</li>);