react key for user list code example

Example 1: react create list of array in react

const App = props => {  const quoteArray = props.quotes.map((quote) => {    return (      <Quote text={quote.text} author={quote.author} />    );  });  return (    <div>      <h2>Famous Quotes</h2>      {quoteArray}    </div>  );};App.propTypes = {  quotes: React.PropTypes.array}

Example 2: jsx map with index

materials.map((material,index) => console.log(index +" = " + material + " = " + materials[index]));