Summary  
This chapter introduces high-order functions—functions that take other functions as arguments or return functions—demonstrated by using Python’s map to apply a given function to each element of an iterable.

General domain of usage  
Data transformation and processing

A **high-order function** in programming is a function that can either **take** other functions as arguments or **return** a function as its result, or both. This concept is closely related to **first-class functions**, which are treated like any other variable in a language (can be stored in a variable, passed as an argument to a function, or used in control statements). **High-order functions** are a key feature in *functional programming*, enabling more abstract or general-purpose code, facilitating code reuse, and making it easier to manipulate functions or data.

def square(x):
    return x * x

numbers = [1, 2, 3, 4, 5]
squared_numbers = map(square, numbers)

# Convert the map object to a list
squared_numbers_list = list(squared_numbers)
print(squared_numbers_list)

A classic example of a **high-order function** is the `map` function in Python. This function takes two arguments: a *function* and an *iterable* (like a list). It *applies the given function to each item* of the iterable and *returns a map object* (which can be easily converted into a list or another iterable type).

In this example:

* `square` is a simple function that squares its input.
* `map` is the **high-order function** that takes square and a list of numbers as arguments.
* The result is each number in the list numbers squared.

In this course, you will learn advanced topics such as function arguments, iterators, generators, closures, and decorators. Dozens of practice exercises will help you grasp these topics.

You'll find this topic enjoyable, and you'll learn how to pack and unpack values in a single assignment.

Explore the power of Python's function arguments, *args, **kwargs, and learn how to effectively use functions as arguments.

Discover the higher-order functions and how functions can be passed as arguments to other functions in programming.

What is variable scope, and how did we manage without it before? This topic is essential for understanding the following subjects: Closures and Decorators. I assure you that this topic will be both enjoyable and practical. You will gain knowledge about local, nonlocal, and global variables.

This section provides an in-depth exploration of Python decorators, a powerful feature that allows for the modification and enhancement of function behavior. Participants will learn how to write their own decorators, understand built-in decorators, and apply decorators in practical scenarios.

High-Order Functions in Python: Passing Functions as Arguments

Løsning

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High-Order Functions in Python: Passing Functions as Arguments

Løsning

Awesome!