Retornar os dois últimos valores de matriz em JavaScript
arr.slice(Math.max(arr.length - 5, 1))
Fancy Fox
arr.slice(Math.max(arr.length - 5, 1))const cutOffFirstAndLastFive = (array) => {
const [first, ...rest] = array;
return rest.slice(-5);
}
cutOffFirstAndLastFive([1, 55, 77, 88]);
console.log(
'Tests:',
JSON.stringify(cutOffFirstAndLastFive([1, 55, 77, 88])),
JSON.stringify(cutOffFirstAndLastFive([1, 55, 77, 88, 99, 22, 33, 44])),
JSON.stringify(cutOffFirstAndLastFive([1]))
);var arr1 = [0, 1, 2, 3, 4, 5, 6, 7],
arr2 = [0, 1, 2, 3];
document.body.innerHTML = 'ARRAY 1: ' + arr1.slice(1).slice(-5) + '<br/>ARRAY 2: ' + arr2.slice(1).slice(-5);