JavaScript Array Methods Explained Simply

forEach() - loop over array's items
map() - new array by calling the provided function in every element
filter() - new array with only elements that pass the condition

const scores = [10, 25, 30];
const passing = scores.filter(score => score >= 20);
const labels = passing.map(score => score + " points");

console.log(labels.join(", "));
console.log(scores.join(", "));
scores.push(15);
console.log(scores.join(", "));

Output25 points, 30 points 10, 25, 30 10, 25, 30, 15

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