What are some common collection methods in JavaScript?

What are some common collection methods in JavaScript?

In JavaScript, common collection methods include map(), filter(), reduce(), and forEach(). Would you like to know more about any specific method?

Can you explain how the map() method works?

Sure! The map() method creates a new array by applying a function to each element of the original array. For example, if you have an array of numbers and you want to double each number, you can use map() to achieve that.

Can you show me a code example of using filter()?

Absolutely! Here's a simple example:

const numbers = [1, 2, 3, 4, 5];
const evenNumbers = numbers.filter(num => num % 2 === 0);
console.log(evenNumbers); // Output: [2, 4]

This filters the array to include only even numbers.

What about the reduce() method?

The reduce() method executes a reducer function on each element of the array, resulting in a single output value. For example, you can use it to sum all numbers in an array.