What array processing methods do you know?

In JavaScript, there are many methods for working with arrays that allow for efficient data processing and transformation. Here are the main ones:

• forEach — iterates over each element of the array, executing a function, but does not return a new array.
• map — creates a new array by applying a function to each element of the original array.
• filter — creates a new array containing elements that satisfy a condition.
• reduce — reduces the array to a single value by applying an accumulator function.
• find — returns the first element that satisfies a condition.
• some — checks if at least one element satisfies a condition.
• every — checks if all elements satisfy a condition.
• sort — sorts the array based on a given criterion.
• concat — combines arrays.
• slice — returns a part of the array without modifying the original.

Example of using map and filter:

const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map(n => n * 2); // [2, 4, 6, 8, 10]
const even = numbers.filter(n => n % 2 === 0); // [2, 4]

These methods allow writing clean and readable code when working with arrays.