Learn Anonymous Functions | Modern and Advanced Function Patterns

Anonymous functions are functions that are defined without a name. Instead of declaring a function with a specific identifier, you create the function directly where it is needed. Anonymous functions are especially useful when you want to pass a function as an argument to another function, or when the function is only needed for a short period and does not need to be reused elsewhere in your code.

Common use cases for anonymous functions include callbacks in array methods like map, filter, and forEach, as well as event handlers in browser programming. By using anonymous functions, you can write concise, focused code that is easy to read and maintain, especially when the logic is simple and localized.


              1234567
            
const numbers = [1, 2, 3, 4];

const doubled = numbers.map(function (num) {
  return num * 2;
});

console.log(doubled); // [2, 4, 6, 8]

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Section 3. Chapter 4

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              1234567
            
const numbers = [1, 2, 3, 4];

const doubled = numbers.map(function (num) {
  return num * 2;
});

console.log(doubled); // [2, 4, 6, 8]

Everything was clear?

Thanks for your feedback!

Section 3. Chapter 4