What are some examples of the decorator pattern in programming?

What are some examples of the decorator pattern in programming?

The decorator pattern allows behavior to be added to individual objects, either statically or dynamically, without affecting other objects. A common example is in GUI frameworks where you can add features like borders or scrollbars to windows.

Can you give me a specific coding example?

Sure! In Python, you can use decorators to modify the behavior of functions. For instance, you can create a decorator that logs the execution time of a function.

How would that look in code?

Here's a simple example:

import time

def time_logger(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        result = func(*args, **kwargs)
        end_time = time.time()
        print(f"{func.__name__} executed in {end_time - start_time} seconds")
        return result
    return wrapper

@time_logger
def my_function():
    time.sleep(1)

my_function()

That's really helpful! Are there other use cases for the decorator pattern?

Yes, decorators can be used for logging, access control, caching, and more. They provide a flexible way to extend functionality.