react arrays
this.state.data.map(function(item, i){
console.log('test');
return <li key={i}>Test</li>
})const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map((number) => number * 2);console.log(doubled);const numbers = [1, 2, 3, 4, 5];
const listItems = numbers.map((number) => <li>{number}</li>);
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