What are some examples of iterators in programming?

What are some examples of iterators in programming?

Iterators are objects that allow you to traverse through a collection, like lists or arrays. Examples include Python's iter() and Java's Iterator interface.

Can you explain how a Python iterator works?

Sure! In Python, an iterator is an object that implements the __iter__() and __next__() methods. You can use it to loop through items in a collection.

What is the difference between an iterator and an iterable?

An iterable is an object that can return an iterator, while an iterator is the object that actually iterates over the elements. For example, a list is iterable, but the list iterator is what you use to access its elements one by one.

Can you give me a code example of a custom iterator?

Certainly! Here's a simple custom iterator in Python:

class MyIterator:
    def __init__(self, limit):
        self.limit = limit
        self.current = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.current < self.limit:
            self.current += 1
            return self.current - 1
        else:
            raise StopIteration