map state react code example

Example 1: react map

{array.map((item)=>{
  return (
    <div key={item.id}>I am one Object in the Array {item}</div>
  )
})}

Example 2: map function in react

function NameList() {
	const names = ['Bruce', 'Clark', 'Diana']
    return (
    	<div>
      {names.map(name => <h2>{name}</h2>)}
      	</div>
    )
}

Example 3: new Map() collection in react state

function MapComponent(){
  const [myMap, setMyMap] = useState(new Map());
  const updateMap = (k,v) => {
    setMyMap(new Map(myMap.set(k,v)));
  }
  return(
    <ul>
      {[...myMap.keys()].map(k => (
        <li key={k}>myMap.get(k)</li>
      ))}
    </ul>
  );
}

Example 4: react map

const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map((number) => number * 2);console.log(doubled);

Example 5: 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}