Cheat sheet de métodos de arrays

const items = [1, 2, 3, 4];

items.at(1); //2

items.pop(); //[1, 2, 3]

items.push(4, 5); //[1, 2, 3, 4, 5]

items.join("-"); //[1, 2, 3, 4, 5] -> '1-2-3-4-5'

items.shift(); //[2, 3, 4, 5]

items.reverse(); //[5, 4, 3, 2]

items.reverse(); //[2, 3, 4, 5]

items.unshift(1); //[1, 2, 3, 4, 5]

items.includes(2); //true

items.includes(99); //false

items.map((num) => { return num * 2 }); //map verboso

items.map(num => num * 2); //map compacto

items.some(num => num > 3); //true

items.find(num => num > 2); //3

items.every(num => num > 0); //true

items.filter(num => num > 2); //[3, 4, 5]

items.findIndex(num => num > 2); //2

items.reduce((acc, num) => acc * num); //120

items.fill(1); //[1, 1, 1, 1, 1]