How can I use map, filter, and forEach effectively in JavaScript?

How can I use map, filter, and forEach effectively in JavaScript?

You can use map to transform arrays, filter to select elements based on conditions, and forEach to execute a function on each element.

Can you give me an example of using map?

Sure! If you have an array of numbers, you can use map to double each number: const doubled = numbers.map(num => num * 2);.

What about filter? How does it work?

filter creates a new array with elements that pass a test. For example, const evens = numbers.filter(num => num % 2 === 0); gives you all even numbers.

And forEach? When should I use it?

Use forEach when you want to perform an action for each element without creating a new array. For example, numbers.forEach(num => console.log(num)); logs each number.